Author Topic: 440 exhaust BIG NUTS  (Read 73 times)

Online postman

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  • Posts: 132
  • Its all about prayers and shares
  • Member since: 2017
  • I own: a Motor Home
  • Year: 1977
  • Make: Itasca
  • Model: Suncruiser
  • Chassis: Dodge
  • Engine: 440-3
440 exhaust BIG NUTS
« on: March 13, 2019, 09:13 PM »
 :)rotflmao  it really shows!





I am just glad the manifolds arent cracked and all the studs came out. I am thinking of wrapping these nuts in Reynolds wrap. Anyone seen these nuts before?


Offline LJ-TJ

  • 14 year member
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  • Posts: 2433
  • Member since: 2003
  • I own: a Motor Home
  • Year: 1975
  • Make: Winnebago
  • Model: D21
  • Chassis: Dodge
  • Engine: 440-3
Re: 440 exhaust BIG NUTS
« Reply #1 on: March 14, 2019, 08:05 AM »
Yep! Scary isn't it. Imagine snapping one of those off. D:oH!

Offline BamBam

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  • Posts: 38
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  • I own: I don't own one but I want one!
Re: 440 exhaust BIG NUTS
« Reply #2 on: March 14, 2019, 10:57 AM »
Those are just oversized spacers basically, don't lose them and make sure you put it back together the way it came apart. Good Luck

Online postman

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  • Posts: 132
  • Its all about prayers and shares
  • Member since: 2017
  • I own: a Motor Home
  • Year: 1977
  • Make: Itasca
  • Model: Suncruiser
  • Chassis: Dodge
  • Engine: 440-3
Re: 440 exhaust BIG NUTS
« Reply #3 on: March 14, 2019, 02:40 PM »
Yep! Scary isn't it. Imagine snapping one of those off. D:oH!

Yep, if you look close at the left one you'll see the exhaust manifold stud that broke loose rather that giant cap nut. One of the other ones like this I held the stud with vice grips and torqued the cap nut and of course it smoothed off the threads. I ordered stud kit and it has arrived. I am going to make my own thread chaser. I will locktite on reassembly.

Later I will post a pic of the passenger side with a built in butterfly valve that needs some discussion. I can't believe the logic of a built in butterfly valve, and NO exhaust manifold flange to pipe gasket!

OHHH!  DAVE!!!

Offline DaveVA78Chieftain

  • 14 year member
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  • Posts: 3511
  • Member since: 2003
  • I own: a Motor Home
  • Year: 1978
  • Make: Winnebago
  • Model: Chieftain
  • Chassis: Dodge M400
  • Engine: 440-3
Re: 440 exhaust BIG NUTS
« Reply #4 on: March 14, 2019, 05:09 PM »
Do not loctite.  Just use anti-seize (bolts protrude into water jacket and can freeze in place so only anti-seize is used).   Do not over torque.  Will crack the manifold for sure.  Yes that low torque value is for real (something like 10 or 15 if I recall correctly).

Offline BamBam

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  • Posts: 38
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Re: 440 exhaust BIG NUTS
« Reply #5 on: March 14, 2019, 05:18 PM »

Later I will post a pic of the passenger side with a built in butterfly valve that needs some discussion. I can't believe the logic of a built in butterfly valve, and NO exhaust manifold flange to pipe gasket!

OHHH!  DAVE!!!



It's a Mopar, you can't question their logic and the way they did things. The manifold had no gaskets to the block as well as the pipe, it is what it is with Mopars. The butterfly valve was to divert heat to the manifold to warm to motor up quicker. If the coiled spring is broke or missing, you can just safety wire the valve open with no issues. That is if it's not rusted shut. Good Luck

Online postman

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  • Posts: 132
  • Its all about prayers and shares
  • Member since: 2017
  • I own: a Motor Home
  • Year: 1977
  • Make: Itasca
  • Model: Suncruiser
  • Chassis: Dodge
  • Engine: 440-3
Re: 440 exhaust BIG NUTS
« Reply #6 on: March 14, 2019, 06:49 PM »
WOW                                                                         WOW
And to think they put this motor in a variety of boats at 50% power just cruising. Makes you wonder how many hours they held together. ???
 

Brings to mind the theme for the U.S.S. Minnow. Pics to come.


Online postman

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  • Posts: 132
  • Its all about prayers and shares
  • Member since: 2017
  • I own: a Motor Home
  • Year: 1977
  • Make: Itasca
  • Model: Suncruiser
  • Chassis: Dodge
  • Engine: 440-3
Re: 440 exhaust BIG NUTS
« Reply #7 on: Today at 07:05 PM »
Do not loctite.  Just use anti-seize (bolts protrude into water jacket and can freeze in place so only anti-seize is used).   Do not over torque.  Will crack the manifold for sure.  Yes that low torque value is for real (something like 10 or 15 if I recall correctly).


OHHH! DAVE!!!  W%


Where can I find those torque specs? OKAY anti-seize it is  ??? , sounds like you've been there done that. Took nuts to machine shop. They decided it was likely the exhaust studs would break anyways, so they are gonna drill them out on a lathe and chase the threads with a plug tap. If worse gets to worse they have the example to make new ones.  D:oH!

 

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