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Belt treatment helped, noise is intermittent but seems to be getting worse. Afraid it may be a bearing going bad. Any tips on how to figure out which one?
Sound does increase with higher rpm on engine with transmission in neutral. Appears to be coming from front of engine. Maybe alternator or water pump pulley going bad. Any tips on how to check them or something else that might be making that high squeal sound with increase in rpm? Thanks
Quick check: open and close throttle while you lightly spray water on the belt(s).
Would also be helpful if you post a video of the engine while it's running, so we can hear the type of squealing and how changes in rpm change the sound.
Tom M.
Get the next smaller fan belt. If it is a bearing, a LONG screwdriver with tip in contact with the different devices (waterpump, alternator, air pump) with engine running and your ear on the handle, it will become evident which one has a bad bearing. Be VERY CAREFUL the screwdriver stays out of moving engine parts!
Get the next smaller fan belt. If it is a bearing, a LONG screwdriver with tip in contact with the different devices (waterpump, alternator, air pump) with engine running and your ear on the handle, it will become evident which one has a bad bearing. Be VERY CAREFUL the screwdriver stays out of moving engine parts!
Before you do that take of the fanbelt and start it up - running for a couple of minutes won't hurt then engine and you will instantly know whether the alternator or the water pump are the problem.
Oh and, - does this B have a fan clutch? If so, it could be that - and there is a cheap and easy fix on youtube.
It may be the harmonic balancer. Mark the inner and out rings with chalk or white out. Then after you hear the squeal check to see if the marks are still aligned.
.
Hi y’all, most here won’t know me, I have a Healey. But as JPSmit says take the belt off and run the engine. U can run for enough time to ascertain the noise. But also while the belt is off, WITH ENGINE STOPPED, turn and wiggle the pulleys. You may feel them loose or ruff running. Not spinning smoothly.
How old are the belts ? They lose their grip over time and my squeel even though perfectly adjusted. I am going through this issue with my 1992 Miata (with original belts).
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