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General E46 Forum
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Old 12-03-2010, 11:10 AM   #41
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I would not suggest it. Not saying for sure but It may be a water pump and would not push it if I did not have to. If I remember right I think you need the T50 torx to release the tensioner the correct way. Did your pump have a warranty? Is that why you want to drive 30 miles? check your WP for play once you remove your belt.
i tried using the t50 torx and the other way to loosen the tensioner but its wont move. also im driving 30 miles to get my car fixed because my friend is a mechanic at bmw, and he helps me out with stuff i cant fix or help diagnose problems, so im taking it to the dealership for him to work on it. i normally take it there if the repair requires a lift like bushings, motor mounts etc. or i cant find out the problem.
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Old 12-03-2010, 11:14 AM   #42
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i tried using the t50 torx and the other way to loosen the tensioner but its wont move. also im driving 30 miles to get my car fixed because my friend is a mechanic at bmw, and he helps me out with stuff i cant fix or help diagnose problems, so im taking it to the dealership for him to work on it.
Its is your car and I am not 100% that it is the wp. Just make sure that you keep your eyes glued to the bat light and your temp. As well as use your nose to smell coolant. Radio off and avoid as much stop and go as possible. Good luck and let us know what it was.
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Old 12-05-2010, 05:19 PM   #43
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On my 330, one of my tensioners is bolted on with the T50 and the other uses an allen head. They should move no problem. My guess is the WP, too. I botched up a coolant change recently and mine sounds similar to yours. Mine noises are quieter, but they sound identical. From the video, I think the noises come from the WP "choking" as it trys to pump the coolant through the system. I think the pressure kind of builds and then releases as the WP struggles. Just 2 cents from an enginerd.
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Old 12-05-2010, 05:36 PM   #44
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If it was transmission related, the noise would change with the transmission. You would control the noise by using the clutch, for example. Since the car is not moving, then it wouldn't be the transmission itself unless it was a bearing on the Input shaft, and should occur in N while standing, or in gear if moving.

Since the noise does not change by depressing the clutch pedal, then the noise is not the transmission or the clutch.

A hanging bendix spring on the starter is a possibility, but these springs are usually pretty robust and not often a source of a problem. If it is your problem, then it won't take long for the starter gear to rip the living crap out of the flywheel, or chew the starter gear up so badly that it won't turn the engine over anymore.
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Old 12-05-2010, 05:40 PM   #45
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Old 12-05-2010, 08:43 PM   #46
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take off the fan belts and start the car and tell us what you hear. This will isolate the pully, water pump and alternator.
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Old 12-05-2010, 09:04 PM   #47
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I wouldn't discount e9coupe's suggestion that it might be the starter motor, if the starter gear doesn't retract completly after starting the motor it can drag on the fly creating the mechanical noises similiar to what you're experiencing. I've had this experience with a boat motor.
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Old 12-07-2010, 11:18 AM   #48
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It was the starter motor...when i got to the dealership i turned off my car, went inside to drop off the keys. they wanted to hear the sound i was talking about so they went outside to start my car, it wouldnt crank so my starter is completely messed up. so they had to push start it to get it in the service area. ill get my car back hopefully tomorrow.
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Old 12-07-2010, 02:18 PM   #49
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Old 12-07-2010, 02:25 PM   #50
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Post some photo's of what the old starter bendix looked like when they removed it.
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Old 12-07-2010, 04:07 PM   #51
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Post some photo's of what the old starter bendix looked like when they removed it.
ill ask my friend to take a pic of it.
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Old 09-18-2013, 03:43 AM   #52
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Hey my car does the same thing..the sound is very loud ...but the sound on mine is constant....did u find the problem???
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