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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Help diagnose serpentine belt squeak



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      12-11-2015, 09:19 PM   #1
Heel Toe
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Help diagnose serpentine belt squeak

Ordered new pulleys and belt.

Last edited by Heel Toe; 12-14-2015 at 09:58 AM.
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      12-13-2015, 01:39 AM   #2
stashtrey
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Just replace the belt and upper and lower individual pulleys. I just did the same and it solved my squeaking. Sounded exactly like that. Easy job.
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      12-13-2015, 05:01 PM   #3
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Belt, tensioner and idlers since they are probably the originals and it looks like you have an oil filter housing gasket leak..
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      12-13-2015, 06:44 PM   #4
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Quote:
Originally Posted by GMWNashville
Belt, tensioner and idlers since they are probably the originals and it looks like you have an oil filter housing gasket leak..
Yeah, that's how much oil it's leaked over 2 years, when I cleaned it last. It burns about 1/3qt per 7000 miles so I'm not too worried about that.
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      12-13-2015, 11:20 PM   #5
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Quote:
Originally Posted by Heel Toe View Post
Yeah, that's how much oil it's leaked over 2 years, when I cleaned it last. It burns about 1/3qt per 7000 miles so I'm not too worried about that.
But it drips on to the belts, thats why my belts were making noise
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      12-14-2015, 09:24 AM   #6
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Quote:
Originally Posted by Mixmaster View Post
But it drips on to the belts, thats why my belts were making noise
No. If anything it would quiet it. A good way to test to see what is squeaking is put a lubricant on the pulleys, this will tell you which one is squeaking. Plus, 1/3qt per 7000 miles isn't dripping oil.. lol. That's how much has leaking over the past 2 years.
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      12-14-2015, 09:42 AM   #7
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I would still get the leak fixed first and clean the belt. Some belts have shredded due to the leak and get wrapped around the crank.
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      12-14-2015, 09:49 AM   #8
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Quote:
Originally Posted by msjt View Post
I would still get the leak fixed first and clean the belt. Some belts have shredded due to the leak and get wrapped around the crank.
I have a spare gasket, just haven't put it in yet. I'll probably replace it in the spring when it's warm again.
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