M42 squeal

[shEck3lls0]

If it is not the belts, then I would imagine it would be some type of bearing. Let us know how it goes.

[pogiE30]

Hi all, yes I have fixed it for now, it seems like my alternator belt was loose so I tightened and it went away for now, its been about a week, *crosses fingers. Although last night I heard it squeal but a different lower tone squeal just for a little bit and went away, hopefully it doesn't come back.

Ill definitely keep you guys updated. Thanks.

[Chigga]

Hey Pogi, did the sound come back? I just replaced all 3 belts on my wife's 318i because the noise, then the alternator belt proceed to snap apart due to bad bushings, replaced that, was fine for 3-4 weeks, now the noise is back on wet mornings again.

[- jay]

Hey Pogi, did the sound come back? I just replaced all 3 belts on my wife's 318i because the noise, then the alternator belt proceed to snap apart due to bad bushings, replaced that, was fine for 3-4 weeks, now the noise is back on wet mornings again.

Whats up Chigga, this is my new account i've been using. Nope, ever since I tighten the alternator belt it went away. I heard one quick squeal a few weeks later but after that, start ups been great. I do really need to change them out though, I think they are in need of a replacement.

Although its normal for belts to squeal under moisture, I'm going to let the more knowledgeable guys chime in. ;)

[Chigga]

Whats up Chigga, this is my new account i've been using. Nope, ever since I tighten the alternator belt it went away. I heard one quick squeal a few weeks later but after that, start ups been great. I do really need to change them out though, I think they are in need of a replacement.

Although its normal for belts to squeal under moisture, I'm going to let the more knowledgeable guys chime in. ;)

After weeks of observing and play around, I've noticed the alternator moves on the bracket over time and causes the belt to slack, and the squeal noise, I've re-adjust the bracket again and noise went away even in wet morning.

Just in case in the future some peeps that are facing the similar problem.

[ck_taft325is]

Those brackets are chintzy at best. Yay, BMW. I'm an "Emergency Garage Mechanic" for a neighbor with a '91 318i and he just broke his alternator belt. After replacement, the new one broke. Bad water pump bearings. He's in process of getting a new water pump and yet another alternator belt. Luckily the alternator bracket has survived 20+ years of adjustment and my own recently.

Glad you tightened the belt and that solved the problem but, if you haven't addressed the water pump or alternator/bracket in awhile (remove, clean thoroughly and replace anything that looks even remotely worn) I would look into doing so in short order. My neighbor was stranded at the bottom of our 875' elevation hill with a dick HOA that threatened within 2 hours to tow his vehicle.

[lookitsranday]

sorry to bring life to the dead, i have the same problem i have all new belts replaced since i did the water pump, and thermostat. its coming from the alternator. help?

just so you guys know as well, when i took the belts off and all that good stuff, i watered down the engine to kind of clean it. i did wipe all of the fluid in sight.