Author Topic: Chevy 454 Distributor Remove/Replace  (Read 9347 times)

Offline DaveVA78Chieftain

  • 16 year member
  • *
  • Posts: 3594
  • Member since: 2003
  • I own: I don't own one but I'm a vintage RV enthusiast!
  • Year: 1978
  • Make: Winnebago
  • Model: Chieftain
  • Chassis: Dodge M400
  • Engine: 440-3
Chevy 454 Distributor Remove/Replace
« on: May 24, 2014, 09:42 PM »

Offline ClydesdaleKevin

  • 14 year member
  • *
  • Posts: 4603
  • Member since: 2005
  • I own: a Motor Home
  • Year: 1995
  • Make: Itasca
  • Model: Suncruiser G34RQ
  • Chassis: Oshkosh
  • Engine: Cummings Turbo Diesel
Re: Chevy 454 Distributor Remove/Replace
« Reply #1 on: May 24, 2014, 10:05 PM »
Great and clear instructions, Dave!  Thanks!

Kev
Kev and Patti, the furry kids, our 1981 Ford F-100 Custom tow vehicle, and our 1995 Itasca Suncruiser Diesel Pusher.

Offline DaveVA78Chieftain

  • 16 year member
  • *
  • Posts: 3594
  • Member since: 2003
  • I own: I don't own one but I'm a vintage RV enthusiast!
  • Year: 1978
  • Make: Winnebago
  • Model: Chieftain
  • Chassis: Dodge M400
  • Engine: 440-3
Re: Chevy 454 Distributor Remove/Replace
« Reply #2 on: May 24, 2014, 10:22 PM »
Copy paste from the Service manual.

Offline BrandonMc

  • *
  • Posts: 190
  • Member since: 2016
  • I own: a Motor Home
  • Year: 1987 coach / 1988 chassis
  • Make: Winnebago
  • Model: Chieftain
  • Chassis: P30
  • Engine: 454
Re: Chevy 454 Distributor Remove/Replace
« Reply #3 on: June 05, 2018, 01:27 PM »
This may be obvious but I still need to ask,


To install a distributor do you use the TDC of #5 cylinder using the bottom timing mark on the harmonic balancer rather than using #1 for TDC plug per the instructions?

The instructions say to use the alternate position #5 when timing the engine. But for simply installing the distributor I am not clear if you would still need to use #1 to find TDC? because simply, I am not able to see the upper side mark, and I'm also assuming the bottom mark isn't going to be good to line up 0 for the #1 cylinder.

Likewise, if my assumption is correct to use TDC at #5, the rotor would then need to be placed between the number 5 and 7 position when installed.

Offline tmsnyder

  • *
  • Posts: 646
  • Member since: 2016
  • I own: a Motor Home
  • Year: 1976
  • Make: GMC Motorhome
  • Model: Eleganza II
  • Chassis: GMC
  • Engine: 455
Re: Chevy 454 Distributor Remove/Replace
« Reply #4 on: June 05, 2018, 02:00 PM »
If you use the #5 pointer, that means #5 is going to be at TDC.   The distributor rotor will be pointing at the #5 spark plug wire on the cap.  So it's the same instructions as if you were using #1, just use #5 instead.


That assumes you are on the compression stroke and not 180 degrees off under the distributor cap.  I use a long regular screwdriver to turn the oil pump a little so as the distributor rotates as it drops down in, it engages the oil pump and turns it that last little bit.   Otherwise you end up with the distributor not seating down in fully into the block, it sits on top of the oil pump.  Just don't drop the screwdriver down into the block LOL  Use a bit enough one that it won't fit down in there!



Offline BrandonMc

  • *
  • Posts: 190
  • Member since: 2016
  • I own: a Motor Home
  • Year: 1987 coach / 1988 chassis
  • Make: Winnebago
  • Model: Chieftain
  • Chassis: P30
  • Engine: 454
Re: Chevy 454 Distributor Remove/Replace
« Reply #5 on: June 08, 2018, 09:02 PM »
Thanks for the replies! I thought Dave had replied earlier too.


Well, I had to ask because I was troubleshooting a brand new distributor, and turns out - out of the box brand new DST1845 wasn't sending the spark at the posts. Ended up ordering another distributor, and sent the old one back. This new one worked like a charm.


Also, I found this video helpful for a diagnosis after testing the coil among other things per the flowcharrt in the service manual: https://www.youtube.com/watch?v=763z6IGyExI

Offline TerryH

  • 6 year member - Full time RVer
  • *
  • Posts: 763
  • Member since: 2013
  • I own: a Motor Home
  • Year: 1992
  • Make: Winnebago
  • Model: Brave 27RC
  • Chassis: GMC P30
  • Engine: 454 Dual Fuel
Re: Chevy 454 Distributor Remove/Replace
« Reply #6 on: June 08, 2018, 10:52 PM »
Are you quite sure that the video you linked to is the one you wished to post?

https://www.youtube.com/watch?v=763z6IGyExI
“Who is more foolish? The fool or the fool who follows him?”
Obi Wan Kenobi, Star Wars, but very current.

Offline Rickf1985

  • 6 year member
  • *
  • Posts: 5928
  • Member since: 2013
  • I own: a Motor Home
  • Year: 1989
  • Make: Winnebago
  • Model: Chieftain
  • Chassis: Chevy
  • Engine: 454
Re: Chevy 454 Distributor Remove/Replace
« Reply #7 on: June 09, 2018, 08:03 AM »
Running a distributor with no loads on the terminal is NOT a good idea!