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Re: crankshaft pulley question Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Tue, 18 Jan 2005 12:39:11
In Reply to: crankshaft pulley question, mark, Tue, 18 Jan 2005 11:22:37 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Yes-
The Harmonic Balancer - aka Crank Pulley, is laminated to reduce vibration.
Usually, but not always, the crank pulley gives some warning. This would be a squeal at startup. The squeal lasts longer and longer. However, not all give this warning. But the pulley rarely goes from perfectly fine to fall apart all at once. A very simple test is to take a piece of chalk and draw it across the face of the pulley, edge to edge. Then start the car a few times, and after shutdown, see if the line is still straight. If the outer edges no longer line up with the inner portion, you know the pulley is shifting. It's quite common to drive the car with a shifting pulley for quite a while and not know it. Also, with the engine running, look at the alignment of the belt on the idler pulley. If it's running right in the middle of the idler, that's good. If the belt is wandering off to the side, that's a sign that the harmonic balancer is failing, and the outer portion drifting in or out on the inner portion.
But the chalk mark test is simple and easy. An inspection mirror on a telescopic arm helps.
Last time I bought a harmonic balancer, I bought it from eEuroparts. Ran a bit over $100, I think. Not a bad task to do yourself, but winter isn't the time. That was a '92 that showed no signs of problem except for a drifting serpentine belt. A casual examination of the pulley showed the rubber sandwich was cracking and damaged. I'm sure it had been that way for quite a while (weeks).
posted by 192.249....
, Tue, 18 Jan 2005 12:39:11 <-- Viewing This Message, Wed, 19 Jan 2005 20:13:04
, Tue, 18 Jan 2005 20:43:29
, Wed, 19 Jan 2005 04:40:45
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