86 351W fuel pump eccentric question

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Jul 18, 2012 | 12:16 AM

FordFETruck

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From: Algona,WA

86 351W fuel pump eccentric question

I'm going to start ordering parts soon, timing chain etc for my 351W and does anyone know if my 86 351W H.O has the 2 piece eccentric or the 1 piece? if anyone could tell me when the 2 piece and 1 piece were used I'd appreciate it. Can't seem to find that info anywhere else.

Jul 18, 2012 | 12:26 AM

ctubutis

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From: Denver Metro Area, CO

I am almost positive it'll be a 2-piece but I'll want to confirm that in the parts book tomorrow. Send me a reminder PM, OK?

2 or 4V carb?

Jul 18, 2012 | 12:26 AM

FordFETruck

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Will do, 4V

Jul 18, 2012 | 09:46 AM

ctubutis

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Thanks for the PM reminder, you might be surprised how useful those things are sometimes.

OK, it's a 2-piece, made up of two different part numbers even:

ECCENTRIC (CAMSHAFT FUEL PUMP DRIVE) Fits 1980/ 351Wheezers
D5AZ-6287-B - Inner
D0AZ-6287-A - Outer

Jul 18, 2012 | 11:16 AM

NumberDummy

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From: Simi Valley, CA

Quote:

Originally Posted by ctubutis

Thanks for the PM reminder, you might be surprised how useful those things are sometimes.

OK, it's a 2-piece, made up of two different part numbers even:

ECCENTRIC (CAMSHAFT FUEL PUMP DRIVE) Fits 1973/1996 351W
D5AZ-6287-B - Inner / D0AZ-6287-A - Outer

Fixed it for you.

Jul 18, 2012 | 11:38 AM

Franklin2

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Quote:

Originally Posted by FordFETruck

I do not know this for a fact, but knowing the design they used on the eccentric, any engine that had a carb and mechanical fuel pump will have a 2 piece eccentric, any engine that was fuel injected and did not have a mechanical fuel pump will have a 1 piece unit(basically just used as a large washer for the bolt).

If you use the 1 once piece unit with a mechanical fuel pump, the eccentric will rub directly on the pump arm. This may or may not be a problem, but I don't think it would be a good thing.

That's why I try to mention to anyone converting a fuel injected engine to carb, if they change out the timing cover to use a mechanical pump, they need to change the eccentric also.

You will see what I am talking about once you get the parts in your hand and look at how they work.

Jul 18, 2012 | 11:42 AM

FordFETruck

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From: Algona,WA

Thanks and no problem lol, the reason why I needed to know which one I had is they make timing chains for the two different eccentrics and I want to get the right chain the first time lol.