Quote:
Originally Posted by KenMasters
Even with a heavier clutch disk? This would more than compensate for the amount of material taken off.
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Why would you think that? "Heavier" should not apply to the Disc, but to the PP, and only then by meaning more clamping force or added rigidity, and had damned well better be made to precision tolerances and NOT EVER "make up" for machine work done to a flywheel that shouldnt have ever been done in the first place.
Heres how I view it, and feel free to disagree with me all you want, its just MHO.
A manufacturer has a very very difficult balancing act between making a part servicable, and making a part people can afford, while ensuring decent quality. Somewhere some engineer who is specifically paid to figure out the flywheel/clutch/powertrain package evaluated whether or not the flywheel should be turned to be put back into service, and if so how much can be removed before replacement. No specification is given, so we must conclude they dont want us resurfacing them. This could be due to several things. The flywheel might be made to tolerance for the material used, clamping force of the intended clutch, etc. it might be surface hardened, it might not be. If it is surface hardened the depth to which it has been hardened might not allow surfacing, resulting in hot spots( places in the fly where material superheats and re-hardens, creating very very hard points that lead to clutch failure, chatter, slip, etc) cratering, grooving, etc. ESPECIALLY when used with an aftermarket clutch disc that it was never intended to be used with. if its at tolerance resurfacing may remove too much material and lead to catastrophic failure -unlikely, Mitsu operates on a very high failure ratio, but it IS a possibility, especailly when subjected to higher than expected loads, abuse, and simple wear and tear.
For the guy working at home doing his own clutch job- its up to you if you want to resurface or not. As a shop I cant afford to risk something like this, and I am very surprised any reputable shop would. A flywheel is a couple hundred bucks, having to re-do a clutch because it wore prematurely, or replace a trans because the trans died an early death because the disc was never really out of the friction zone, etc, is a LOT more.
