Belt Squealing Unresolved, Losing Patience (04-09-07)
***UPDATE April 9, 2006***
why would a brand new tensioner pully squeak? Is there anything I can do to fix it? I have tried WD-40, only works for a short time, as does everythign else. It is NOT the tensioner pulley as I thought it was. everything spins nicely. The alternator makes slight mechanical noises when turned, but the noise stops when a little water is sprayed on it, for only a couple mins though. WD-40 only works for a few mins too. I have done everything, I cleaned the whoel engine bay thoroughly last night, and sprayed some protectant (tire shine cleaning foam, I always use it for underhood) on it, it was quiet for the whole night. Then today, I started it up, and it was just squealing away. I sprayed a little protectant on the belt again, and it was quiet. I suppose this rules out any bearing or pulleys, etc. The belt itself looks like new though. There are no cracks or shining, nothing. The mechanics all said it was fine too. Looks like new. I don't understand it.
I took the belt off, and put it back on. It was quiet for a minute or so, then started squealing. It goes away under accelaration above 2k rpms, then comes back when the engine slows down.
I tried belt dressing, I will never use that again, it did nothing, it actually made it worse and was messy and my mechanic told me never to use it.
1998 PONTIAC BONNEVILLE SE, 182K mi