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post #1 of (permalink) Old 05-30-2003, 10:31 PM
kernel
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4.3 problems

I'm just finishing up a 4.3 install into a 4runner. I just started it up tonite, it runs but makes a horrible screeching sound from the underside of the engine. At first we thought it might be the torque converter cover rubbing on the flywheel but taking it off makes no difference. Anybody have any suggestions? 95 CPI Vortec.
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post #2 of (permalink) Old 05-30-2003, 11:37 PM
 
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Re: 4.3 problems

Try shimming the starter.
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post #3 of (permalink) Old 05-31-2003, 03:38 AM
kernel
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Re: 4.3 problems

With anything in particular or would a couple of washers work? Thanks
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post #4 of (permalink) Old 05-31-2003, 10:38 AM
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Re: 4.3 problems

I think they make shims just for that, but a washer would do in a pinch.
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post #5 of (permalink) Old 06-01-2003, 09:22 PM
 
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Re: 4.3 problems

The washers would be a temporary fix because they would shim the starter too much and not give enough contact between the starter gear and ring gear, leading to wear on both.
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post #6 of (permalink) Old 06-05-2003, 11:50 PM
 
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Re: 4.3 problems

Does it make noise only when turning over, or only while the engine is running? Does the pitch of the noise change with a change in RPM, or with the A/C on or off?

As far as shimming out the starter to the correct position, the slip shaft inside the starter should be exactly 1/8" from the flexplate or flywheel teeth. You'll need the correct diameter rod or a 1/8" drill bit to check the position of the starter. A decent Chilton's manual will show you in detail exactly how to inspect the starter position.

The noise you described doesn't sound like a misadjusted starter though. I'm thinking a slipping drive belt or something rubbing against a drive pulley?
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