Quote:
Originally Posted by Ultramaroon
Yeah, I responded to your earlier thread on this. Get an inexpensive mechanic's stethoscope. Or if you have short hair, a screwdriver will do. Touch the alternator while it's running and lay your ear on the handle. I bet you'll hear that whine coming from it.
The other thing you can do to test is disconnect the accessory belt. Don't have to completely remove it so it takes only a couple minutes. Just make sure it's not hanging near the crankshaft. Start the engine and quickly listen for the sound. Do not run it any longer than, I dunno, 15-30 seconds because the water pump is not running.
If you still hear the sound, which I seriously doubt, you'll be in for a real treat because, unless you failed to tell us about having a blower, the only other thing that could potentially make that sound is the oil pump.
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Thanks for the advice, I actually bought an automotive stethoscope yesterday and I tried for a few mins listening with it touching the alternator and didn't hear the sound. It isn't constant and seems to go away after the car warms up which made me wonder if it is the tob. ( I didn't spend enough time listening to the alternator to rule it out however) This weekend I will have more time to hopefully diagnose where this inconsistent sound comes from. I did come across this post which also describes what I'm experiencing
Quote:
Originally Posted by Ganthrithor
In the last few weeks, my car has developed a new noise. - On a cold start, there is a squealing sound from the engine bay... sounds a little like a quieter version of a fluid-starved power steering pump with the car on the lock stops.
- The noise seems to minimize at idle (500-700rpm), but as soon as I bump the RPM to 1000 or above, the noise returns and seems RPM-sensitive (the sound changes with RPM).
- The squealing sound persists regardless of clutch position (although the sound sometimes fluctuates a bit as the pedal is being moved in or out).
- I poked my head around the engine bay trying to figure out where the noise was coming from but couldn't locate its origin. My mechanic at a local shop put the car on a lift and said he though it was coming from the clutch and said it sounded like a throwout bearing.
- The noise lessens as the car warms up.
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So @ultrmoon you don't think this is a tob issue and likely something else causing the sound?