Question about 2001 BMW 325

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Engine noise I have noice coming from the upper part of the engine. It doesn't appear to be the water pump. A neighbor thought it could be the time chain?

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  • carlton23 Nov 01, 2008

    It sounds like a fast ticking/grinding noise. My first guess was that it was a fan pulley or similar, so I used a metal rod against my ear trying to isolate the noise and appears to be loudest at this aluminum part that sits directly above the water pump, to the right/front of valve cover. I could take a pic and send it to you if it helps. The noise seems to increase slightly with I rev the engine, but not in the same ratio as the increase rpms. The sound is consistent and not intermittent like the noise from my water pump before it went out a couple of years ago.

  • RICHARD HAWKINS
    RICHARD HAWKINS May 11, 2010

    There could be a few different areas giving the noise, is it a ticking, whirring or knocking noise

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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

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