Balancing problems
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Balancing problems
Hello everyone, my 1978 F-250 has a rebuilt 351w in it and i think it is out of balance. I know there were 2 different balancers I think. A pre 1980 and a post 1980 same as fly wheels. How do I tell the difference, and if so can i just change the balancer to match the flywheel since they are externally balanced?
thank-you in advance.
thank-you in advance.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Originally Posted by 78150
Hello everyone, my 1978 F-250 has a rebuilt 351w in it and i think it is out of balance. I know there were 2 different balancers I think. A pre 1980 and a post 1980 same as fly wheels. How do I tell the difference, and if so can i just change the balancer to match the flywheel since they are externally balanced?
thank-you in advance.
thank-you in advance.
4 different balancers used 1969/79.
5 different balancers used 1980/91.
Balancers have Ford ID codes stamped on them. List what you find.
Postmaster
Joined: Jun 2005
Posts: 2,656
Likes: 1
Originally Posted by 78150
Hello everyone, my 1978 F-250 has a rebuilt 351w in it and i think it is out of balance. I know there were 2 different balancers I think. A pre 1980 and a post 1980 same as fly wheels. How do I tell the difference, and if so can i just change the balancer to match the flywheel since they are externally balanced?
thank-you in advance.
thank-you in advance.
you have to match the flywheel Balancer and the crank.....
you cant use 28oz FW and B with a 50oz crank... it all has to match.
whats the history... engine swap, transmission change? why is it out?
.351W all were 28oz never changed like the 302/5.0
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Look at the casting numbers on the balancer, an E2 and up will be a 50 oz balancer, as far as I know they never changed the Windsor's balancers as pertains to casting numbers, they all were 28 oz. It is possible to put a 50 oz 5.0 balancer on a Windsor crank, although the imbalance is wrong for it. Good luck on the flywheel numbers, if it's got a non Ford flywheel.
Cargo Master
Joined: May 2007
Posts: 2,071
Likes: 35
From: British Columbia
As Baddad says, you will have to check the casting number (or possibly compare the counterweight appearance to examples of both weights) to insure you have the right weight. Someone could have put a late 302 or even a 300-6 flyweel and/or balancer on it. Well I'm not sure that the 6 cylinder balancer will bolt on, but its flywheel sure will. It has no counterweight as the six is internally balanced.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
It's actually a Ford engineering number that's stamped on the balancers, not a casting number.
Cars: 1969 only: C9OE-6316-E / 1970/74 = no #'s listed in parts catalogs / 1975/79 = D5AE-AA or AB or DA.
Trucks (not all balancer #'s are listed): 1975/79 = D5AE-AA or AB or DA / 1980/91 = E1TE-CA or DA; E8TE-BA.
--------------------------------------------------------------------------
Ford did mark some 351W flywheels with an engineering number.
Cars: 1969/74: C7TE-A on engine side, 164 teeth.
Trucks: 1975/87 #'s not listed / 1988/91 = E8TR-BA
While the balancers (and some flywheels) are usually marked, parts catalogs don't always show what the markings are. If you find a number that I didn't list, post it anyway...I can call someone and get the info.
Cars: 1969 only: C9OE-6316-E / 1970/74 = no #'s listed in parts catalogs / 1975/79 = D5AE-AA or AB or DA.
Trucks (not all balancer #'s are listed): 1975/79 = D5AE-AA or AB or DA / 1980/91 = E1TE-CA or DA; E8TE-BA.
--------------------------------------------------------------------------
Ford did mark some 351W flywheels with an engineering number.
Cars: 1969/74: C7TE-A on engine side, 164 teeth.
Trucks: 1975/87 #'s not listed / 1988/91 = E8TR-BA
While the balancers (and some flywheels) are usually marked, parts catalogs don't always show what the markings are. If you find a number that I didn't list, post it anyway...I can call someone and get the info.
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Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Originally Posted by NumberDummy
It's actually a Ford engineering number that's stamped on the balancers, not a casting number.
Casting number---Engineering number = same thing. And it is cast into the balancers, not stamped 
I use "casting" simply because it's easier to type.
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Originally Posted by baddad457
Casting number---Engineering number = same thing. And it is cast into the balancers, not stamped I use "casting" simply because it's easier to type.
Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
All the balancers I have in my possesion (almost a dozen, both small and big block) and all those I've had in the past, all had the numbers cast into the balancer. Hence the reference to it as a casting number. Engineering number is also correct, but in this case either applies. It's always possible to find one with the numbers stamped, but I've yet to see one. When it comes to what Ford did or did not do, I never rule anything out.
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