Dave J
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| posted on 13/1/04 at 02:18 PM |
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flywheel balancing
Hi Guys,
Have just faced up my flywheel and got to the balancing bit
I've searched all over the forum for an answer to this one, so apologies if I'm going over old ground.
Question:
When balancing the flywheel, is it advisable to have the clutch back/ pressure plate fitted during the process?
Am doing it without at the moment.
I've got the flywheel rotating on two precision knife edges used in balancing grinding wheels.
Seems to work ok.
Thanks
Dave
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David Jenkins
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| posted on 13/1/04 at 03:33 PM |
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When I had my flywheel done at the shop, they did the crank, flywheel and clutch cover in one go.
Howver, they did it on a dynamic balancer, spinning the whole assembly while the machine told them how balanced it was, where the heavy bits were, and
so on.
David
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Dave J
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| posted on 13/1/04 at 04:05 PM |
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Thanks David.
Unfortunately I cannot go that route.
I'll pop the clutch back plate on and see what the difference is.
Cheers
Dave
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david walker
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| posted on 13/1/04 at 06:55 PM |
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The correct way to balance a crankshaft assembly is to balance the crankshaft then add front pulley and balance that, then the clutch, balance that
and finally the pressure plate.
Static balancing is little better than useless but as it is better than useless then OK do it. If you have only faced the flywheel rather than
lightened it then you would be OK to leave it, I doubt your knife edge method with show anything. Clutches are suppossed to be balanced by the
manufacturer anyway.
When flywheels have been lightened it is imperative to balance. The reasons for this are twofold: The machining process will have removed some or all
of the OE balancing holes and secondly some attempts at machining flywheels are so bad that they need doing for that reaon alone.
By the way balancing V8 crankshafts is a bit more awkward than 4 or 6 cylinder so always check should you look to have a V8 balanced.
Dave Walker, Race Engine Services - 07957 454659 or 01636 671277
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Dave J
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| posted on 14/1/04 at 11:20 AM |
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Thanks David, that's cleared up a few questions.
Dave
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