Classic Winnebagos & Vintage RVs

Topic Boards => Dodge - Chrysler Chassis => Topic started by: bagodriver26 on September 14, 2009, 07:54 PM

Title: Correct thermostat for 440-3?
Post by: bagodriver26 on September 14, 2009, 07:54 PM
Sent: 6/10/2004

what degree thermostat do I need for the 440?
Title: Re: Correct thermostat for 440-3?
Post by: Sea Hag on September 14, 2009, 07:56 PM
Sent: 6/10/2004

The thermostat for a 440 is 185 Degree . It also has to be the skirted type , for the 440 which has the lower portion ( engine side )of the thermostat enclosed with three ports for the water flow - this restricts the coolant flo to  keep it in the engine block a little longer to properly cool the engine evenly . with the non skirted type installed the 440 3 will run too hot as the coolant passes through the block and radiator too fast , not allowing the coolant to properly asorb engine heat . I,ve been told that this can cause  coolant to boil and force coolant away from portions of the block  and cause major engine damage . There is a OEM sticker on the air-horn of air-cleaner that shows a drawing and also in the Dodge chassis service manual . Mine is hard to read but has Dodge part number 3837 609 From what I can make out .This differs from the parts catalog  . if someone else can read theirs and these are incorrect please post the proper number .The 360 can use either type  and I believe the 318 and 413 can also .  Only the 440 3 needs the skirted one . Sea Hag
Title: Re: Correct thermostat for 440-3?
Post by: winnedaygo619 on September 14, 2009, 07:57 PM
Sent: 7/9/2004

i found it  went to five different auto part stored 2 dodge dealers and dodge dealer had it skirted thermostat heres a pic  it was only 11 bucks
Title: Re: Correct thermostat for 440-3?
Post by: denisondc on September 14, 2009, 07:57 PM
Sent: 7/9/2004

And you can order them from www.summitracing.com (http://www.summitracing.com/). Their part number is MRG-4367 for the 180 degree unit, MRG-4366 for the 160 degree unit. Similar cost.

Stewart Components Inc also has the skirted type thermostats, and their web page says you can order from them directly.

https://www.stewartcomponents.com/index.php?route=product/product&path=61&product_id=63

Title: Re: Correct thermostat for 440-3?
Post by: AlienImpulse on September 14, 2009, 07:59 PM
Sent: 7/24/2004

Hag, I have a 1978 440-3, and the thermostat # (3837609) you posted is correct. Mine is easily readable. Currently mine has no thermostat. Wondering if I should put one in? I'd feel better having one installed but who knows what other problems it might bring up!

Jeff
Title: Re: Correct thermostat for 440-3?
Post by: Sea Hag on September 14, 2009, 08:00 PM
Sent: 7/24/2004

Alan - YES you need to install a thermostat or you will ruin your engine  - I left a reply to you other post prior to reading this one . the manual calls for a 185 degree . But since the only coolant control vacuum switch is for the EGR and it is a 85 degree switch ( for 76 anyway ), so going to one of the 180 degree thermostats above should work fine . I guess I should of gone to Chrysler before replacing mine but I hate paying the big $$$$$$ at a Chrysler dealer . Sea Hag
Title: Re: Correct thermostat for 440-3?
Post by: AlienImpulse on September 14, 2009, 08:00 PM
From: AlienImpulse
Sent: 7/24/2004

winnedaygo619...is there any chance you could post the part number? I cannot read it from the pic!
Title: Re: Correct thermostat for 440-3?
Post by: winnedaygo619 on September 14, 2009, 08:01 PM
Sent: 7/25/2004

part # e-4  3418459  this is the 190 thermostat
Title: Re: Correct thermostat for 440-3?
Post by: AlienImpulse on September 14, 2009, 08:02 PM
Sent: 7/25/2004

OK the one from Summit is 10 bucks with another 10 bucks for a "handling" charge which means I get it some time in the next 14 days and it costs me 20 bucks for a thermostat, and the one from Stewart says that I 'must" have a Stewart water pump to use it, and it will end up being the same price & shipping time as the one from Summit. I'm leaving Friday for a short trip. Fact is I went from RI to Tennessee & back, sat in slow moving traffic for 5 hours in, and 5 hours back with no thermostat, so I would think installing a non skirted thermostat has gotta be better than none.
While I was at NAPA yesterday I gave them the 3837609 part number, and it cross referenced to a non skirted NAPA thermostat. I think I'm just gonna put in the NAPA thermostat in for now, and see if I can get the skirted one later.
I understand what a thermostat does, and have installed many over the years, but it was my own fault for taking it for granted that the idiot who owned the RV before me would have yanked out the old thermostat! In other words, had I known that there was no thermostat before I left for Tennessee I would have most definitely installed one before I left!
Between the problems with the Tranny (had to rebuild), 17.5" tire replacement (a grand to buy), trying to get my brakes working, trying to fix my gas gauge, get my refrigerator working, rebuilding the ceiling, and waterproofing the roof, and quiet down a rotted out (entire) exhaust, I never got a chance to pull the thermostat...or lack there of!!
Thanks again everyone,
Jeff
Title: Re: Correct thermostat for 440-3?
Post by: Crazytrain on September 14, 2009, 08:03 PM
Sent: 8/4/2004

Hi Girls and Guys ,

went hunting for a skirted thermostat, and the part guy told me that Chrysler don't list these anymore.

where can I find a skirted thermostat???

Crazy Train
Title: Re: Correct thermostat for 440-3?
Post by: metrawatt on September 14, 2009, 08:04 PM
Sent: 8/5/2004

I just bought mine from jegs.com its made by  a company called BeCool part number 134-78007, it looks just like the factory original in my RV right now.  I have yet to install it but as soon as I opened the box I knew I had bought the right one, not like the ones NAPA, Advance, Dodge dealer and Summit tried to sell me.

Some folks say the skirted stat is a restricted flow, this is NOT so.   Take a skirted stat and a "normal" one and boil them on your stove.  You will see the huge difference in flow.  The skirted stat has a much bigger opening and apparently fails to open!

Title: Re: Correct thermostat for 440-3?
Post by: denisondc on September 14, 2009, 08:05 PM
Sent: 8/5/2004

The skirted thermostats I got from Summit Racing looks just like the one is winnedaygo619s picture, message #4 earlier in this thread, though of course summit sells the regular passenger car thermostats also.
Title: Re: Correct thermostat for 440-3?
Post by: Jupp318 on September 14, 2009, 08:05 PM
Sent: 8/8/2004

When I had my overheating problem with the electric fan, I checked with my service manual that I had the correct thermostat. I was surprised to find that the skirted thermostat is only correct in the 413 & 440 engines.  The 318 has a non-skirted version.

Cheers Ian...
Title: Re: Correct thermostat for 440-3?
Post by: Sea Hag on September 14, 2009, 08:06 PM
Sent: 8/10/2004
The 440 is the only one that needs the skirted thermostat. the parts manual says 413 318 & 360 can use either type . Sea Hag
Title: Re: Correct thermostat for 440-3?
Post by: denisondc on September 14, 2009, 08:07 PM
Sent: 8/11/2004
I believe that parts catalog has a mistak W%
The air cleaner inlet horn on my 413 has a label showing the skirted thermostat. I just uploaded a picture of the thermostat mount in my 413 water pump housing, showing why the skirted thermostat is needed. Its in my photo album, which is now on page 10 of the pictures, and on the 2nd page of my album - along with a picture of the thermostat label on the air cleaner. I had a regular thermostat in there for a while many years back, and my water temperature wandered up and down whenever it liked - though it didn't overheat, probably because the radiator had just been cleaned that spring. Afterward I made up a steel collar to fit down into the area below that collar, to close off the warm-up loop. That worked okay for years, but I replaced it last spring when I got a skirted thermostat. Now my water temp readings stay very steady - even when its hot outside and Im climbing hills or sitting in traffic. I have not seen a 440 water pump housing with the thermostat removed, so I don't know if it looks the same inside. My 32 Chevy sedan takes the same type of skirted thermostat, though smaller in diameter.
Title: Re: Correct thermostat for 440-3?
Post by: Sea Hag on September 14, 2009, 08:09 PM
Sent: 8/11/2004

Dave , I though I may have misspoke when I posted the 413 info . the parts catalog does not match my air cleaner horn sticker number on my 440 either . It as actually in my 76 service manual that stated the 360 could use either type . I recently replaced the thermostat in my 440 after flushing and rinsing the block ,swapping radiators for one from a donor chassis that wasn't clogged and installing the missing fan shroud .The thermostat that was in there from PO was the wrong one . I Installed a Slant 13478  180 degree non skirted type ' but has a much smaller center valve opening than others Ive seen makes me wounder if thats how they restrict the flow . it supposedly crossed over from the Chrysler number on my air cleaner sticker . On my recent trip the temp stayed around 190 or less even in traffic jambs . ambient air temp was mild for this time of year at around 80 degrees . at speeds over 65 MPH in hilly country the temp got to 200 or a touch over not near 210 which is the next mark on the gauge and would drop back under 200 if I kept it under 65MPH . the changes in temp were gradual  and stayed pretty steady . It would be interesting to see what the difference is if I can find a correct skirted one with the original part number .
      Metrawatt - the skirted thermostat does restrict the flow . not by the valve opening but by the skirt and the three or four small ports in the bottom of the skirt . I was told that it slows the flow to allow the coolant to adsorb more engine heat by a very knowledgeable and reputable mechanic friend of mine . he said with out one the block or heads can biol the coolant in spots and force coolant away from that area , it is a major problem with some of the Chrysler engines . Sea Hag
Title: Re: Correct thermostat for 440-3?
Post by: denisondc on September 14, 2009, 08:10 PM
Sent: 8/11/2004

If your radiator is pretty clean, then a normal thermostat will probably work fine for a couple of years at least. As the radiator loses its effectiveness though, I believe the original style thermostat will be nicer to have. With most of my old cars, having the thermostat out results in the water temp reading staying low -- assuming the radiator was good. In my little 3 cylinder 2 stroke saab however, leaving the thermostat out meant overheating on every hill - the temp needle would seesaw up and down like an altimeter! It must depend on the relative sizes and capabilities of the cooling system parts; water jacket, radiator, pump, things like that.
Title: Re: Correct thermostat for 440-3?
Post by: Sea Hag on September 14, 2009, 08:11 PM
Sent: 8/12/2004

Yes My radiator and block are very clean inside . before I removed the old radiator I  drained the system including the block . Flushed and rinsed it twice . then filled the system with water to test and rinse  after I had the donors radiator cleaned , tested and installed . I then drained it and filled the system with antifreeze and a Bottle of  anti rust/ lubricant additive . after all that work I intend to change the coolant every couple of years at least , to keep it that way . The old radiator had been previously damaged and repaired at one time . it also had a lot of junk deposits in it . Not alot of rust and no oil in old coolant but due for a change .
  In reply #19 I meant to say running the wrong Type thermostat ill cause damage to the engine not running with no thermostat .  Sea Hag
Title: Re: Correct thermostat for 440-3?
Post by: lockman on September 14, 2009, 08:12 PM
Sent: 8/28/2004

Had a beast of a time finding a skirted thermostat. First Chrysler dealer said part # 3837609 was no longer available and I should go to my local parts store. No luck there, tried every chain in town, and the cost to bring one in from on-line suppliers in the States was very expensive. Did some web research and found Chrysler # 3512998 is a direct replacement. Second dealer was more helpful, confirmed #3512998 was a skirted 185 degree thermostat and even found me a dealer across town that had one in stock. Caused a little flurry of interest at the counter as some of the new kids had never seen one before. It fit perfectly and dropped my high temps by about 10 degrees. Cost me approx. $14.00 US, cheap insurance in my books.
Title: Re: Correct thermostat for 440-3?
Post by: Crazytrain on September 14, 2009, 08:13 PM
Sent: 9/6/2004

Hi everybody.

I have to admit. I thought that the skirted type thermostat was an urban legend. My 440 had the tendency to run a little hot. I bought a Mr.Gasket 180 skirted thermostat and I replace the 160 standard type.

I did 400 miles this week end towing my car and the temp is stable!!!

I'M A BELIEVER!!! The skirted thermostat is mandatory on a 440-3.

Crazy Train
Title: Re: Correct thermostat for 440-3?
Post by: oldRoadRanger_al on September 14, 2009, 08:14 PM
Sent: 2/18/2005

Hi all,
What resource this site is, here’s some important info on this subject.
I bought a proper balanced/skirted thermostat like the original Chrysler from jegs.com (BeCool part number 134-78007) for 20 bucks +, I then ran across the info below on a skirted Robertshaw available at Autozone for $4.99. Oh well… at least you guys can now have the correct skirted design thermostat at a cheap price!

"Robertshaw Extra Performance # 370-180 which is the correct design and part number for the 440 motor at Autozone for $4.99
The Robertshaw Extra Performance series thermostats have a dual function.
Unlike the flat disc-type t-stat, this one has a skirt that moves up and down.
If the t-stat housing is made for this unit, it will have a seat down below the skirt.
When the engine is cold, the water flows from the block through a bypass hose or passage, maintaining good flow in the block.
When the engine gets to temp, the skirt drops, allowing less flow through the bypass and more through the radiator.
When the engine is pulling a good hill (temp above setpoint), the skirt blocks the bypass completely, and the bulk of the flow is directed to the radiator.
Advantages include better flow in the block, better warm-up, and better cooling flow through the radiator.
Using a flat-type t-stat in a housing that has a bypass port will not allow full flow to the radiator, limiting cooling capacity. In addition, the skirted design is balanced- water pressure from the pump does not effect opening and closing at all.
Design is used extensively in bigger diesel engines."
Title: Re: Correct thermostat for 440-3?
Post by: denisondc on September 14, 2009, 08:16 PM
Sent: 2/20/2005

     Thanks for the autozone part no.    I think RoberShaw actually produces the thermostats for half a dozen different brands sold by different retailers. 
    I have tried all 3 temperature thermostats available, the 160, the 180, and the 195.  They all work fine with my 413, just the temperature needle points to a different part of the center section on the gauge; left-of-center, centered, or right-of-center.   I have the 160 in now, since we were using it in summer time temps in the southern U.S. and towing a car.   It probably wasn't necessary, so I expect to switch back to the 180 the next time I have it opened up.  The 195 makes the heater work a little better in cold weather though.  Still doesn't get the interior warm if its below freezing outside.
Title: Re: Correct thermostat for 440-3?
Post by: oldRoadRanger_al on September 14, 2009, 08:18 PM
Sent: 2/23/2005

It looks like I flapped my beak a little too quick in the earlier post. I went down to Autozone and in this part of the country they no longer carry RobertShaw Extra Performance thermostats, still listed in the computer though.
Further Internet study has shown RobertShaw was sold and that the BeCool & Mr. Gasket 'stats are one and the same as... and made by RobertShaw (the BeCool I got even has #370-180 stamped in it).
The search continues for this skirted thermostat at a good price....
Title: Re: Correct thermostat for 440-3?
Post by: intofire1 on September 14, 2009, 08:19 PM
Sent: 3/6/2005

Hi,
Has anyone had trouble with the part that houses the thermostat. Where would I get this part? Gil
Title: Re: Correct thermostat for 440-3?
Post by: denisondc on September 14, 2009, 08:20 PM
Sent: 3/6/2005

If you cant find one anywhere else, I expect to have one arriving via media mail in a week or two. Hopefully it wont be badly corroded. Would be glad to pass it on to you for what it cost me. -which isn't much-.
In the meantime you make send an email to Arizona RV and ask them if they have one. www.azrvinc.com (http://www.azrvinc.com/).
I was kind of thinking of trying to get someone to cast up a few new ones in bronze. 
Title: Re: Correct thermostat for 440-3?
Post by: intofire1 on September 14, 2009, 08:21 PM
Sent: 3/6/2005

Thanks I will take mine off this week and I will let you know the out come. Gil
Title: Re: Correct thermostat for 440-3?
Post by: intofire1 on September 14, 2009, 08:21 PM
Sent: 3/11/2005

Replaced the thermostat and flush the radiator. It all look good once I clean the engine up. The old thermostat look like the new one so I will keep as a spare part. Spent from 6am to 4pm working on the MH most in the shop on wheel bearings (that's another post). My wife states that I could not have a girlfriend because I was covered with grease. It was an enjoyable day. Thanks for the help. gil
Title: Re: Correct thermostat for 440-3?
Post by: Easybago on September 14, 2009, 08:23 PM
Sent: 10/20/2005

Tonight I removed my 195 degree skirted thermostat and replaced it with a regular 180 degree Stant thermostat (NAPA man said I don't need a skirted thermostat). I'm thinking 195 - 210 degrees is just too hot. After getting everything back together, I fired her up and let it idle for about 25 minutes. Everything looked good until I put her on the road. As soon as I started driving, the temp started rising. I only drove it about 5 miles round trip but the temp reached 220, higher than it has ever been. Needless to say, a skirted thermostat will be going back in. I'm gonna look real hard tomorrow for a 160 degree skirted thermostat.

When I got back in the house, I did a little research on skirted thermostats and found an interesting article on how the skirted thermostats work in Land Rovers. I assume the 440's work on the same principle. The following is the article, author unknown.

"The series III and earlier Land Rovers use a skirted thermostat. There is a cylinder or skirt that moves when the thermostat opens. This moving cylinder is actually a coolant flow valve.

The thermostat housing has an oval opening in the side which leads to the bypass hose. The bypass hose forms a passage between the radiator entrance and exit allowing coolant to be pumped through the engine while the thermostat is closed.

If there were no coolant flow while the thermostat is closed local hot spots will occur in the head that will eventually cause head cracks.

The skirt on the thermostat closes off the oval bypass opening when the thermostat is open. When the thermostat is closed, the skirt is away from the opening so that water can flow through the bypass.

If you use the common skirtless thermostat the by-pass opening remains open continuously regardless of engine temperature. The pump of course will pump the same amount but the flow will take the line of least resistance which is through the by-pass rather than the long way around through the radiator.

This will cause your engine to run hotter in warm weather. The temperature gauge sender is located at the front of the engine by the thermostat. With most of the water bypassing the radiator, temperatures at the rear of the head can be significantly higher than your temperature gauge indicates. The high temperature gradient can cause the head to crack.

Engines from the 110 onwards have a different thermostat housing and uses the common skirtless thermostat. Instead of the large oval opening the housing has a bypass hole about 3/8" in diameter.

When the thermostat is closed, the small opening to the bypass hose provides sufficient bypass flow to keep hot sports from occurring in the head.

When the thermostat is open the small hole provides more restriction than the radiator forcing most of the coolant to flow through the radiator."
Title: Re: Correct thermostat for 440-3?
Post by: Cooneytoones on September 14, 2009, 08:24 PM
Sent: 10/20/2005

Randy.....The NAPA guy is wrong...  in the 440, the skirted Thermostat is a must....I got a Stant.....   bought at NAPA......I'll post the parts number tomorrow...

Timmy
Title: Re: Correct thermostat for 440-3?
Post by: Easybago on September 14, 2009, 08:25 PM
Sent: 10/20/2005

Yeah, he's way off on alot of things. He also gave me the spark plugs with the gaskets when I told him it takes tapered plugs. However, I did get the right starter! Only because I took the old one with me...lol

After I told him I was getting my info from the site, he says, and I quote..."It's just someone elses opinion". So now after doing all this work and gonna have to do it again, I have formed an opinion about him and it's not too good.

The PN would be great! Thanks!
Title: Re: Correct thermostat for 440-3?
Post by: Cooneytoones on September 14, 2009, 08:26 PM
Sent: 10/21/2005

The original Mopar thermostat is almost impossible to find. Not impossible but very hard..they do exist but are rare.....None of NAPA's numbers cross over to the original Dodge part  number.....after extensive searches, and I think another post on CWM, the thermostat I'm using now is a NAPA Superstat 532080 ...it is made by Stant, and is skirted. The 440's run much hotter than most of Chrysler's other engines, the skirted thermostat also has a larger opening in it and the skirting slows down the flow just enough to keep the coolant in the radiator for a few seconds more allowing the coolant to cool properly, the other good thing about the skirted thermostat is, if they fail....they fail in the open position, not closed, and you won't be walking out of Dodge to get it fixed.
According to the Dodge Chassis Service Manual... "ALL 440-3's must to use the skirted thermostat and nothing else or they will run too hot and fail.....the 413's however can use either. " Dodge not only states this, they illustrate it in the manual with two pictures saying for the 440's use this one, NOT this. Pointing to the skirted and non-skirted....Tell the NAPA guy it's not anybodies opinion, it's a fact from the Dodge engineers. And the only opinion that counts in the parts business is weather you buy parts from his NAPA store, or go down the road to CarQuest, Advanced Auto Parts or some other store that is knowledgeable about what part will fit correctly.

and that's the facts
Timmy
Title: Re: Correct thermostat for 440-3?
Post by: Easybago on September 14, 2009, 08:27 PM
Sent: 10/22/2005

That number is sweet music to my eyes. After going to every dealer in town today and coming up with nothing, nada, zilch, 0, I will confront my local NAPA man with this Monday morning to see what he has to say about that.

I went ahead and re-installed my original 195 degree skirted thermostat this afternoon so we could make our little trip to the lake in the morning. I ran Annabelle for at least 20 miles after re-installing the thermostat and she never got above 205 degrees. Can't hardly wait for a 160 or 180 degree thermostat.

You da man Timmy! Thanks!

Randy
Title: Re: Correct thermostat for 440-3?
Post by: SmallDiscoveries1 on September 14, 2009, 08:28 PM
Sent: 11/1/2005

Grr!. Napa part number 532080 is not a skirted thermostat. I used this thread to order one. It is now sitting in my car. Timmy would you care to photocopy that manual and send it to me or post a picture here.

I cannot find this thermostat. I was told by the Dodge dealer that part number 3512998 is not in stock at any dealer in the country and does not cross-reference to a new part number. It is obsolete. I went to AutoZone without any part numbers. They couldn't help me. I called back with Robert Shaw part number 370-180. I was told it was not in stock but they had some on order and it would be on the shelf tomorrow. The lying SOB. I went there today. None have been ordered since 2001. They have not had any in stock since 2002. The part was no longer stocked by them. They again could not help me. They are going to get a letter and a frequent customer card sent back to them. My shadow will never again grace their doorway, to many problems, to many times.

I went then to Napa where I had ordered part 532080 yesterday. It was in but not skirted. I heard a story from the manager that he has been selling parts since 1972 and the 440 has always been this one particular part no matter what 440 it is. The one I bought, part number 532080 is not skirted. Timmy, I want to take the information from your service manual into him and tell him to post it on his forehead so he won't forget that they indeed are different.

Needless to say. I have not found the correct skirted thermostat locally and the thermostat put in by Greene's is not the correct one. I guess I have to pay $20 some odd dollars at Jeg's and hope that the one that comes to me is skirted. According to Jeg's: "Product images may differ from actual product appearance."
Steve who is so ticked off that he didn't eat lunch.
Title: Re: Correct thermostat for 440-3?
Post by: Easybago on September 14, 2009, 08:29 PM
Sent: 11/1/2005

I'll take partial blame for your frustrations today. I ordered the 532080 from NAPA last week and found out it is not skirted. I was going to post about that but with being so busy trying to get everything ready for my trip this past weekend, I simply forgot. I feel your pain as I have exhausted all avenues locally of finding one.

I ended up just putting the 195 degree thermostat back in seeing as the weather is cooling off somewhat. Hopefully, I'll find one by next spring.
Title: Re: Correct thermostat for 440-3?
Post by: Elandan2 on September 14, 2009, 08:30 PM
Sent: 11/1/2005

OK,  I'll try again.  Go to www.stewartcomponents.com (http://www.stewartcomponents.com/) .  They have skirted thermostats in all temperature ranges for $10.95.  They are made by Robertshaw.
Rick
Title: Re: Correct thermostat for 440-3?
Post by: Cooneytoones on September 14, 2009, 08:30 PM
Sent: 11/1/2005

I have a NAPA 532080 Superstat.........    and it is skirted......looks exactly as the picture in the 1976 Dodge Service Manual...  I will scan the Manual page tomorrow and post it right here....yes the Dodge Part is obsolete and nothing crosses over....but the Robertshaw T-stats also will work as well (they are skirted)
Timmy
Title: Re: Correct thermostat for 440-3?
Post by: Cooneytoones on September 14, 2009, 08:31 PM
Sent: 11/1/2005

Here is a photo of a Skirted Thermostat.....The NAPA 532080 Superstat looks just like this...


Timmy
Title: Re: Correct thermostat for 440-3?
Post by: Easybago on September 14, 2009, 08:32 PM
Sent: 11/1/2005

It may be that Stant changed their thermostat but kept the same number. The one I got was just a regular unskirted thermostat, but it sure was pretty and shiny! It's looking like the Stewart Components thermostat may be our only option now.

Now, I'm going down in temperature, but do I go all the way down to 160 or 180 degrees? I live in eastern NC and it gets very hot and humid here in the summer.
Title: Re: Correct thermostat for 440-3?
Post by: SmallDiscoveries1 on September 14, 2009, 08:32 PM
Sent: 11/2/2005

I will take a picture of the new napa part number 532080 and post it. It doesn't look like that at all. As Easybago said, it is bright and shiny. It looks just like any other thermostat. Too bad there is not a manufacturer out there reading this thread.

I'm thinking if I can find a number of the correct ones for $4.99, I just might buy 10 of them, keep a couple and offer the rest up for sale here. This is ridiculous trying to find the correct thermostat for an engine that is in thousands of motorhomes.
Title: Re: Correct thermostat for 440-3?
Post by: denisondc on September 14, 2009, 08:33 PM
Sent: 11/2/2005

The unskirted thermostats will probably work if your cooling system is otherwise good, i.e. the radiator is fairly clean, fan clutch is good,…But with a fully warmed up engine you will still have some water getting pumped through the “warm-up” loop, instead of it all going through the radiator. You wont have 100% cooling. This would be more noticeable when the radiator has been in the vehicle for a few years and its heat transfer capacity is diminished by sludge, etc.
You can order the skirted thermostats on-line from www.summitracing.com (http://www.summitracing.com/), over the phone with a credit card. The part number is MRG-4367 for their 180° thermostat, about $10 plus shipping. They don’t seem to offer the 160 or 195 thermostats now, but you could call and ask them. A few years ago they did list them.
Another source is: www.stewartcomponents.com (http://www.stewartcomponents.com/). The catalog number for their ‘mopar big block’ skirted thermostats is: 304, 305, and 306, for 160°, 180°, and 195° respectively. They are each $13 plus shipping.
As for which thermostat temperature you choose; in my 413 I have used all 3 temperatures. They all work about the same, with only 2 differences: The location where the temp gauge needle points to, and how feeble the heater is during chilly weather with the 160° thermostat in it. With an unskirted thermostat, and a clean radiator, the water temp gauge needle would wander up and down mysteriously.
Since most of our use of our Winny is in summertime in the U.S. south, I have been using the 160° thermostat. Running too cool is not a problem in the Rio Grande valley in summer.
Title: Re: Correct thermostat for 440-3?
Post by: The_Handier_Man1 on September 14, 2009, 08:34 PM
Sent: 11/2/2005

I was given this info from an old parts guy and used it to find a couple of thermostats last year. If you go to http://www.partsvoice.com/ (http://www.partsvoice.com/) login as a guest with your zip code and then the find parts page you can locate dealers around the country that might have what you need. The part no. for my thermo is 3512998 . Good luck, Les
Title: Re: Correct thermostat for 440-3?
Post by: SmallDiscoveries1 on September 14, 2009, 08:35 PM
Sent: 11/4/2005

Ordered 3 thermostats from Summit Racing yesterday. I took pictures. Two are Miloden parts MIL-16405 and MIL-16406, the other is Mr Gasket, part MRG-4367. Remove the prefix for the manufacturer part number. They are all correct. The first part number is for the 160 degree thermostat. The other 2 are 180 degree thermostats. Here are pictures with the last one being a comparison of the now incorrect Napa part to the correct Mr Gasket part. Since they have been hard to track down in the correct configuration, you may want to get them while you can, before some cost cutting company wants to make a change like everyone else and start selling the wrong thermostat.

Don't bother paying the extra $2.07 for the Miloden. The Mr. Gasket and Miloden are exactly the same, even have the 370-180 stamped on them. There is no visual difference what-so-ever between the two. They are obviously made on the same assembly line.

Hope this helps. BTW - the opening for the Napa part is about half the size of the other thermostats. Think this has something to do with overheating?

Steve
Title: Re: Correct thermostat for 440-3?
Post by: Elandan2 on September 14, 2009, 08:36 PM
Sent: 11/4/2005

I went to a parts outlet here that is listed as a Mr. Gasket dealer (Lordco Auto Parts)
and they have the Mr. Gasket skirted thermostats listed.  Only 13.89 Cdn.( that's about free in US dollars, lol)  Rick
Title: Re: Correct thermostat for 440-3?
Post by: brakeparts on September 14, 2009, 08:37 PM
Sent: 11/8/2005

Hi all !

For anyone looking for a top quality thermostat from the days when these things were made with real copper and real brass, I have 8 160 degree Dole thermostats for the Dodge 318 or 440 engine which have a wide skirt on them and are truly beautifully made - all brass with a copper core element! I have had these in the warehouse for some 25 years since the days when McQuay-Norris had the Dole brand thermostat line to sell.

Frankly, I would like to liquidate these parts as they have no place in my current business model. If anyone would like one or more, they are available for $12 each delivered via USPS Priority Mail to all 50 states, taxes included. A second thermostat is only $8 in addition, so two would be $20 delivered.

I am sorry, but I do not have any 180 or 195 degree units.

The Chrysler part number is 3514774; this part is shown by Dole/McQuay-Norris for both a 160 and a 180 model.

Contact me via email at brakeparts@mac.com or by phone at the whse.

Regards,

Geoff
Alretta Truck Parts Inc.
508-788 -9409 / 10:30-5:30 weekdays
Title: Re: Correct thermostat for 440-3?
Post by: Easybago on September 14, 2009, 08:38 PM
Sent: 11/8/2005

I called Geoff today and ordered two of the thermostats. I spoke with him for awhile and it was nice to speak with someone who sells parts and actually knows what we have! I'm sure I'll be dealing with him in the future for many of my winnie's needs.
Title: Re: Correct thermostat for 440-3?
Post by: zzzfly on September 14, 2009, 08:39 PM
Sent: 11/12/2005

Take a look on Ebay. Picked mine (Stant) up for 5.00 new and 2.00 shipping.

bob
Title: Re: Correct thermostat for 440-3?
Post by: OldEdBrady on September 14, 2009, 08:47 PM
Sent: 12/11/2005

It appears Stewart Components may have changed their email address. I received a catalog from them a couple for days ago, and they show an entirely new address.

They sell water pumps, thermostats, and a few other items.

http://www.waterpumps.com (http://www.waterpumps.com/)

Phone numbers:
(906) 789-28126
(906) 233-0305 - Fax
(336) 859-2555 - Tech
Title: Re: Correct thermostat for 440-3?
Post by: AllanCZ on September 14, 2009, 08:48 PM
Sent: 3/14/2006

According to the pictures on their website, it looks like Checker/Schuck's/Kragen might have the skirted thermostats.

http://www.cskauto.com (http://www.cskauto.com/)

Prestone Thermostat, Power Performance
PN's 370160, 370170, 370180, 370195
160, 170, 180 & 195 degrees respectively.
$12.99 each

We have Checker here so I'll go check in-store soon.

Allan
Title: Re: Correct thermostat for 440-3?
Post by: AllanCZ on September 14, 2009, 08:49 PM
Sent: 3/14/2006

Here's a link to it at the Prestone site:

http://prestone.com/products/capsThermostats.php (http://prestone.com/products/capsThermostats.php)

It's all the way at the bottom.

Allan
Title: Re: Correct thermostat for 440-3?
Post by: JCMAC on December 26, 2012, 05:46 PM
  Use a 180°F for max fuel economy and 160°F for max power.  This is the standard for internal combustion engines.

John
Title: Re: Correct thermostat for 440-3?
Post by: PwrWgnWalt on January 12, 2013, 08:01 PM
Here's a picture of the correct style of thermostat...  This brand was made by Robertshaw, as is common.  Got 4 of them at $4.99 each, plus a little S&H (off of eBay, see my other post)

(https://www.classicwinnebagos.com/forum/proxy.php?request=http%3A%2F%2Fs5.postimage.org%2Fsqjim7g9v%2F440_3_Tstat_3.jpg&hash=d107c61070b60711fb06173c5e8b4fb82adbfe67) (http://postimage.org/image/sqjim7g9v/)

- Walt