The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums
Re: Call for aid: what IS that noise? (long) (archive)
[ Follow Ups ] [ 2002 Message Board ] [ Msg. Board FAQ ]
Posted by Peter S on July 16, 2000 at 15:51:11:

In Reply to: Call for aid: what IS that noise? (long) posted by Chris R on July 16, 2000 at 14:32:05:

Perhaps the alternator being misaligned is causing the belt to run twisted a bit on the pulley. Slipping belts certainly sound like you're describing. High squeel usually. In my experience a bad water pump sounds something like really bad pinging. The AC clutch could be an issue too. Does the noise change when the AC is on? Either remove the belt(s) for a brief test or use some belt dressing spray. You will at least rule out the belts doing this test.
Or there is a cat jammed into the engine somewhere and is screaming with pain.
Peter s



My tii is turning heads these days...because of the insane squealing coming from the front of the engine. At first I suspected the water pump, which I had replaced with an NOS piece last month (V-belt and injection pump belt also replaced then) or the alternator, which was listing due to shot bushings. But the cooling system seems to be working fine, and I've rebushed the alternator and it's quiet. I don't relish undoing earlier work until I know what I need to pull off. My tubing "stethoscope" points to the crank pulley area.

Further info: This high-pitched noise started occasionally on ignition, then soon started to come on under load. Now it's constant until engine warms up, then disappears until revs exceed 2000 or so. It changes pitch with engine RPM. Maybe 200 miles run since repairs and onset of noise. AC compressor is fitted but not the problem.

My questions: Could a crank bearing go bad so quickly, and would it be really loud like this? If yes, am I trashing the bottom end by continuing to drive the car? Could it be the crank pulley itself? Would that tilted alternator have so quickly screwed up the shaft or impeller of the water pump? Is it possible internal lube of water pump deteriorated in years on the shelf? Could it be something else horrible, like the timing chain? THese are the questions that keep me awake at night.

Please post or email your comments and theories, expert or crackpot welcome. TIA




Follow Ups:


[ Follow Ups ] [ 2002 Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk.
Roadfly.com Logo © 1997 - 2009 Jump Internet Inc. All rights reserved.