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Jun 18, 2011 | 08:48 PM

#9 (permalink)

onehundred80

Senior Member

Joined: Apr 2006

Posts: 25,432

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From: Ontario

Re: 185 crank pulley allignment problems

Quote:

Originally Posted by MikeR

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My understanding is that the pulley has a mechanical dampening system built in....not just a simple AL wheel on a steel hub....

I do agree that is sounds like the machinist may be making some kind of error... there have been a few of these reported.

My original 181 had an undersized hole(~.002"-.003")on the steel hub and would not go on the crankshaft... the replacement slipped right on.

I did not say they had no damping system, I said without the damping system they should cost the amount stated. Not having seen the system employed I am unable to access its cost. Frankly it cannot cost too much and I fail to see why an OEM hub and damper could not be used and a pulley attached by welding or bolts and balanced. I tend to think that some of these pulleys have no damper anyway.
I vaguely remember some system which employed springs, whether these had been engineered or guessed at is another matter. Loading the springs to get the correct result would not be easy and assembly a biitch. Having a damping system does not guarantee it does anything positive. OEM dampers have the benefit of a large engineering backup and elastomer's possess known qualities.
If the quality of the bores are as stated I would think that they are being made on the cheap by the lowest bidder. The aluminum for the pulley would not be my first choice, and was selected for ease of machining.
Too much faith is put in some add ons, which may or may not have been designed by someone with the correct skills and knowledge. The failure of some after market Crossfire parts shows this to be sadly too true.

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