Question about 2001 BMW 325
From what you describe, the first step i would recommend is removing the aux belt that runs the alternator, power steering etc and check all the pulleys for wear or noise if ok then run the engine, but only for a few seconds to see if the noise is still there. if it is i would then remove the front timing cover and check all the pulleys for wear. every pully should be perfectly silent and smooth when turned by hand, the slightest noise would be exagerated when the engine is running. if they all check out ok it could well be a cam shaft problem. that can be checked by removing the cam cover and you should be able to do a visual inspection on the cam shaft, there should not be any scores on the lobes. let me know how you get on or are unsure about anything, just a point if a belt has been running to tight it will very quickly damage a pulley bearing resulting in a whirring or rumbling noise.
Posted on Nov 01, 2008
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jul 21, 2013 | Cars & Trucks
Sep 12, 2012 | Cars & Trucks
Sep 29, 2010 | 1999 Ford Taurus
May 24, 2010 | 1987 Honda Accord
Nov 19, 2009 | 2001 Chevrolet S-10
Apr 21, 2009 | 2004 Ford Taurus
Aug 24, 2008 | 2001 BMW 325
136 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: