The wrong harmonic balancer?

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May 31, 2010 | 10:08 PM

HOME WORKS

Thread Starter

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The wrong harmonic balancer?

Ok, I checked the #'s for my balancer and it's a 28oz. My engine is a 1991 302 with a few perfomance parts ie. RPM Performer heads & Edel. 2 x 4 intake & MSD ignition. It's mated to a t-5 also.
I got the engine as is from the previous owner and just fired it up recently and found the timing marks to be nowhere near the pointer. While determining true TDC I thought I'd verifie the balancer being correct,
So my question: is there any reason to use a 28 oz. balancer instead of the 50 oz.
Thanks in advance for your input, David

May 31, 2010 | 11:37 PM

littlehusky

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Joined: Aug 2009

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Is it a 5.0 HO or a Truck engine?
I/E what is your firing order?

Jun 1, 2010 | 12:22 AM

Handegard

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Quote:

Originally Posted by HOME WORKS

Are you positive it's not a 28oz crank and flexplate?

It's possibly if the engine was replaced that someone grabbed a older one....

The 28ox balancer, crank, and flywheel/flexplate are a combo. They aren't supposed to be mixed and matched...

Jun 1, 2010 | 06:38 AM

HOME WORKS

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The engine ID# indicates 1991 t-bird. The PO got the engine in a mustang he planned to drag race but decided to replace it after a short time with a stroker. The engine has been rebuilt.I've had the oil pan off and checked the rod & main bearings. They are marked standard and the crank has #E7AE-AA on it. The pistons are TRW (on the bottom) supposed to be 10 over? The cylinders still show the cross hatched patern and the pistons and rods show the grinding & drilling signs from balancing.
I purchased the t-5, along with all the necessary parts to install it ie. bell housing, pedal assembly, driveshaft, new flywheel etc. The flywheel is 157 tooth which I understand to be the 50oz. I'm pretty sure the PO had the engine hooked to an automatic trans.
Am I safe to just install a new 50oz. balancer and not worry about it?
By the way this engine is going into a 32 ford roadster I'm building.
Thanks everyone, David

Jun 1, 2010 | 06:52 AM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

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From: Simi Valley, CA

What is the Ford ID number marked on the harmonic balancer?

What number did you find on the engine that points to a 1991 T-Bird?

Jun 1, 2010 | 11:58 AM

HOME WORKS

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Hey NUMBER DUMMY,
The balancer is Is from C.A.T. Performance Engine Parts # HBF 302C
and the engine # next to the starter location reads F1SE BB

Jun 1, 2010 | 08:10 PM

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

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From: Simi Valley, CA

Quote:

Originally Posted by HOME WORKS

Hey NUMBER DUMMY,
The balancer is Is from C.A.T. Performance Engine Parts # HBF 302C
and the engine # next to the starter location reads F1SE BB

Just because the bare block casting number is 1991 T-Bird related, does not mean the engine was only used in T-Birds, or in 1991 only.

Casting numbers cannot be cross referenced to Ford part numbers, cannot be used to ID the size of the engine, or what it is from. Basically they are worthless.

So you are only assuming the block is from a Bird. It could be from a Mustang, Mark, Crown Vic, Grand Marquis, T-Bird/Cougar, Town Car.

The crankshaft ID number of E7AE-AA was Ford part number E7AZ6303A which was replaced by E4ZZ6303A and used in darn near every 302 from 1987 thru 2004.