My '99 Sentra (manual transmission) has started making a squeeling sound. The sound only seems to happen if the car is under a load (increasing speed either slowly or quickly). It seems to start around 2000 RPM and gets faster (more constant) with higher RPM's again only under a load. If I take my foot off the gas or push in the clutch the sound goes away immeadiately. The car has 104,000 miles.
I've already replaced the break pads, rotors, and rechecked it all twice and checked the calipers. I've replaced a CV Joint that had a split boot. I've also had the belts replaced and a new pully put on. The sound is still there.
Anyone else heard of this before? The sound is driving me crazy as it's getting quite loud.
I would try to isolate the problem by driving the car at the speed at which the noise is the loudest and then put the transmission in neutral and shut off the engine. If the noise is still there then it's prolly in the drive train or possible in the transmission... if the noise is gone, then it may be your clutch or the engine.
Careful when you do this test, you wanna make sure you'll be able to stop your car. I'm aiming high assuming it's the pilot bearing making that noise but I can't really tell till I drive the car. Are you going to fix it yourself no matter what it is?
Thanks, I tried your test. The moment I push in the clutch and put the car in neutral the noise went away - even before I shut the engine off. With the engine off there was no noise. Again as soon as you remove the load (ie neutral) the noise goes away.
I did discover the noise seems to occur only around 2300 - 2600 RPM and then slowly quiets down at higher or lower RPMs.
Yes, I am planning to fix this problem no matter what it is. Does this sound like the Pilot Bearing to you?
Quote:
Originally Posted by Twiz
I would try to isolate the problem by driving the car at the speed at which the noise is the loudest and then put the transmission in neutral and shut off the engine. If the noise is still there then it's prolly in the drive train or possible in the transmission... if the noise is gone, then it may be your clutch or the engine.
Careful when you do this test, you wanna make sure you'll be able to stop your car. I'm aiming high assuming it's the pilot bearing making that noise but I can't really tell till I drive the car. Are you going to fix it yourself no matter what it is?
He had the belts replaced, perhaps he should check the tension? Measure the deflection of the belts.. look up the specs and see if there's enough tension or not.
If it's a clutch related problem has to be fixed right away before it turns into a major problem. Does it sound like a bearing seizing up? You'll want to run a couple more tests before you consider servicing the clutch. I found this thru a quick search. I replaced clutches on diff cars before... VW Golf (very difficult), Alfa Romeo (really easy to replace) and Acura CL (somehow difficult) but I did it cause the clutch was slipping, I didn't have a bearing problem.
How about goode ole vacuum leak? Clean your idle control valve and change the gasket, same with throttle body. You probably need it by now, anyway.
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93 Sentra XE 5spd, running well... 82 924 Turbo under construction... 82 Suzuki GS650G, under construction... 76 Firebird Formula 5.7, waiting for the next summer.
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