351 with impropper flywheel
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New User
Joined: Apr 2008
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I actually already did it. To be honest there isn't enough vibration for me to notice it has the wrong flywheel. The only reason I know it isn't right is because I read on here that 351s need a 28oz flywheel- after I had already reused my 50oz from my 302.
Cargo Master
Joined: May 2007
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From: British Columbia
Years ago as a youngster I went to buy a surplus flywheel from a fellow who was swapping motors in a van. He had put a small block flexplate on his 300-6, or the other way around, I don't remember now. I advised him that I believed the balance was different, even pointing out the counterweight vs. no counterweight on the flywheels but he seemed to think there was no problem. I have no idea how it worked out.
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The 351 is a 95 and the 302 is a 94. It is definately a 50oz flywheel. There really is no vibration at all. Is it possible that the new crank isn't balanced at 28oz?
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Cargo Master
Joined: Jan 2004
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From: Cook Forest and Irwin PA
it depends on what the crank is set for. I have a TMD crank in my 347 and it balanced 50 - and the guy who did it balanced it to 7000rpm.
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Elder User
Joined: Jan 2004
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From: Troy,NY
It's possible but not likely. What crank is it? What balancer did you use?
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
All Ford harmonic balancers have ID numbers stamped on them.
302: E4TZ-6316-A / Marked: E4TE-AA / 1984/96
351W: E8TZ-6316-B / Marked: E8TE-AA / 1988/96
Ford does not mark the ounces on flywheels. The 1995 351W uses a different flywheel than a 1994 302. Some of these are marked, some are not.
Info source: 1980/89 & 1990/2002 Ford Light Truck Parts Catalogs.
302: E4TZ-6316-A / Marked: E4TE-AA / 1984/96
351W: E8TZ-6316-B / Marked: E8TE-AA / 1988/96
Ford does not mark the ounces on flywheels. The 1995 351W uses a different flywheel than a 1994 302. Some of these are marked, some are not.
Info source: 1980/89 & 1990/2002 Ford Light Truck Parts Catalogs.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Do you still have the ring part numbers, or the sales receipt?
Call the place you bought them from and ask them exactly what engines those rings fit.
According to several Ford parts catalogs I have, the rings used on 1969/96 351W's are the same part number as 1963/68 289's and 1968/85 302's, which means...the rings are the same.
Call the place you bought them from and ask them exactly what engines those rings fit.
According to several Ford parts catalogs I have, the rings used on 1969/96 351W's are the same part number as 1963/68 289's and 1968/85 302's, which means...the rings are the same.