351w flywheel
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Post Fiend
Joined: Nov 2005
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From: Charles Town, W bygod Va
351w flywheel
Since I put my rebuilt motor in, it seems a little rough at idle. I dissmissed it as a liitle cam lope(rv cam), but I am finding conflicting info on the flywheel. The block I rebuilt has a 2 piece rear seal and I reused the flex plate from my old one piece motor. Autozone shows the same flex plate for 82 and 86, but different rear mains(1 piece/2 piece) Summit racing shows one for internal balance with 2 piece rear and external with 1 piece.WTH!!
Flexplates - summitracing.com
Flexplates - summitracing.com
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Joined: Dec 2008
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From: Page Az.
Your engine is external balance unless you spent a lot a money having it rebalanced for internal. I believe the 351s stayed 28 oz external through the 80s and then 50 oz external in 90 something. I can't remember the year for sure I don't usually play with newer windsors. Did you check your harmonic balancer? If you have the wrong flywheel it will shake the engine pretty hard as you accelerate.
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Post Fiend
Joined: Nov 2005
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From: Charles Town, W bygod Va
I bought a used 351w from an 86 e350 to rebuild, but it was a napa reman that had a few miles on it. I did new rod/main bearings, rings/hone D0oe heads rv cam dual plane intake, but apparently it was an older block (its a 2 piece rear main). I used the balancer that came on the used engine, and the flex plate from my worn out, newer block (1 piece rear). It runs pretty good power wise, just a little rough at idle. Like I said it just seems a little shaky ay idle, not sure if the little bit of cam I put in would be even noticeable as far as a lope goes. Its an edelbrock low end cam, dont remember the specs. Can anyone explain why summit shows different flexplates for 1 & 2 piece rear seals?
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Post Fiend
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From: Charles Town, W bygod Va
I ASSume it is the oe 86 engine I pulled, not sure on the "new" one thats in there now but it has a 2 piece rear, so its an older block. (kinda confusing, my new engine is older than my old engine)
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From: Page Az.
Did you ever look at the casting numbers on both blocks? that will tell you the years they are but it doesn't sound like the flywheel is a problem.
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Cargo Master
Joined: May 2007
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From: British Columbia
All production 351W/5.8 engines are balanced at 28 oz-in. Probably the difference in the flexplates is to match up to different torque convertors or different number ring gear teeth etc.
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Ford Parts Specialist
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From: Simi Valley, CA
D1ZZ6375A .. Flexplate: 1980 / 1982/89.
EOAZ6375A .. Flexplate: 1981
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From: Page Az.
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
Parts catalog sez for 1981 Econolines sold new in CA.
It also says 1981 F150/350, but makes no mention of CA.
-------------------------------------------------------
And...5 DIFFERENT Harmonic balancers 1980/89!
1980: D2AZ6316A / Parts catalogs do not list ID number, only the dimensions: 6 3/8" O.D. / 4 1/8" long
1981/83: E1TZ6316A / With EEC / Marked: E1TE-CA
1981/83: E2TZ6316A / Without EEC / Marked: E1TE-DA > > replaced by > > E4TZ6316B
1984/87: E4TZ6316B / Parts catalog doesn't list ID number.
1988/89: E8TZ6316A / Marked: E8TE-AA
This jazz was typed directly from the 1980/89 Ford Light Truck Parts Catalog.
Dimensions for D2AZ6316A were taken from the 1965/72 Ford Passenger Car Parts Catalog.
Ford Parts Specialist
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From: Simi Valley, CA
Note the added harmonic balancer info above.