wh1-Denver
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- Joined
- Aug 15, 2002
- Messages
- 259
I need to know if the OEM engines are internal or externally balanced.
Thanks.
Thanks.
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SignUp Now!Originally posted by The Pro
PM me his information, I'd love to speak to this idiot.
Originally posted by Chuck Leeper
Production engines are EXTERNALLY balanced. EVERY stage 2 I've EVER seen is internally balanced.. This allows for acessories to be moved from engine to engine without a re-balance...
The meaning of this is:
Per the BUICK performance manual, "the production v-6 engines are balanced as a complete assy, so when changing con rod, crank, piston,FLYWHEEL, or balancer, you must rebalance the engine."
The above statement means that the components are specific to that assy, and as such contribute to the balance of the engine.
Having said that, I looked at the flywheel and balancer in my shop.[86GN, prod. engine]
The flywheel DOES NOT have external wts on it. It has a series of 6 cutouts and a couple smaller holes in it. The circle of 6 has 3 that are cut out completely and the opposing 3 are cresent shaped slots. This puts the wheel w/ an OFFSET of wt to the cresent side.
The harmonic balancer has a rather LARGE wt cast on ONE side. This puts the balancer w/ an OFFSET of wt to 1 side.
Therefore: the balancer, the flywheel, the crank and the bobwts have to be spun as an assy.[That's why the flywheel is drilled off location on 1 hole and the balancer has a key in it..
With an engine that is INTERNALLY balanced, the accessories such as the flywheel and harmonic balancer, are NEUTRAL or ZERO balanced, INDEPENDENT of the crank.
The crank alone is balanced w/ the bobwts.
Make sense??
As for the wrong wheel on an engine, a good way to make your car into your GF's "bestest friend".. a 3700# VIBRATOR!!!