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| | | | Joined: Aug 2006 Posts: 486 'Bolter | | 'Bolter Joined: Aug 2006 Posts: 486 | I'm putting a 292 six with a NP440 transmission into a '68 gmc. I'm not a mechanic so I'm trying to follow the manuals I have as closely as I can. One of them states that when installing a new clutch the flywheel and clutch assembly must be balanced. None of the other manuals I have mention balancing. I've checked around and can't find anyone in my area that balances flywheels any more. I was told the only place within reasonable driving distance that still does it takes several weeks to do it. One mechanic I talked to said that very few people balance them because it's so hard to get it done around here. How dangerous is it to skip this step? I don't want to take any chances that might cause me to have to take this all apart. Thanks for any advice.
Jeff
'64 swb stepside (gone)
'57 1 ton
'53 phone truck
'59 swb
'46 1 1/2 ton
'68 swb gmc
| | | | | Joined: Feb 2000 Posts: 5,228 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,228 | On a recent Pontiac V8 build I did, the machine shop that I use, that specializes in crankshafts told me if the engine is balanced internally, the flywheel will be balanced by itself. I didn't have it done and felt no vibrations or anything odd. I really doubt you will have any problems. A fellow I work with came from UPS, he was one of the truck mechanics. Listening to some of his stories about the 292's, I don't think you could ever hurt one.
Joe | | | | | Joined: Feb 2004 Posts: 29,841 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,841 | When the pressure plate is manufactured or reconditioned, it's balanced as part of the process. Ditto for the flywheel. At the normal RPM range a street engine is likely to run, extra balancing isn't necessary. If you're planning to rev one into the 6K RPM range or above, it might be a good idea to do some more precise balancing, but the engine is going to need some detail work to approach that speed.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Mar 2011 Posts: 1,146 Shop Shark | | Shop Shark Joined: Mar 2011 Posts: 1,146 | Read this Post / Thread ,Flywheel/pressure plate balance? | | | | | Joined: Nov 2011 Posts: 1,611 'Bolter | | 'Bolter Joined: Nov 2011 Posts: 1,611 | I felt compelled to open your link to see who else asked the question... My setup has operated with no problems for over a 1000 miles so far. I think all is okay.
Last edited by Paul_WNC; 09/11/2016 1:20 PM.
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