Date: Wed, 27 Jul 2005 07:35:02 -0400
From: Malt_Hound <Malt_Houndnospamm*>
Subject: Re: 1982 900 crankshaft pulley source?

James Sweet wrote: >>The crank pulley, or harmonic balancer, consists of two pieces of steel >>- an inner disk and an outer ring - with a rubber band sandwitched >>between them. >> >>As the rubber ages, it is no longer capable of transmitting full torque >>to the outer ring, so you get slippage between inner disk (driven by the >>crankshaft) and outer ring (which drives the belts). >> >>The symptoms usually start with a squeal on startup, and on revving etc. >>Similar to belt squeal. This gradually gets worse, until the pulley >>eventially comes apart. >> >>A good way to keep an eye on it: using white marker, draw a couple of >>lines on the outer surface of the pulley (the face you can see), running >>from the center to the outer edge. These lines cross the rubber band. If >>you ever get slippage, the lines will no longer line up. A quick glance >>at the pulley at service time will tell you if there's been any slippage. >> >> > > > > Ah, that makes sense, didn't realize the belts were driven through the > harmonic ballancer. > > As versus what? AFAIK all belt drives come off the harmonic balancer... -Fred W

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