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M52 Engine Ticking

Discussion in 'E36 M3 (1995-1999)' started by Tetris, Jun 24, 2010.

    Tetris guest

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    S52 Engine Ticking

    On Rev
    http://www.youtube.com/watch?v=IgupecXbeVE
    At Idle
    http://www.youtube.com/watch?v=4chjjv7WkOw


    I purchased my 1999 M3 about a month ago. During the 2 weeks I drove it, I noticed a really loud raspy hammer on metal sound coming from my engine. I emailed the previous owner who said it was the oil being too thin. I changed the oil (15w50 and a quart of 0w-40), to no success.

    I took it to a BMW performance shop who said it was definitely bad lifters. When pulled, the lifters were pitted and squishy. They had a machine shop check them who confirmed they were bad. Lifters replaced, engine buttoned up, noise was a lot quieter, but still could hear it, especially at cold start. For 10-15 seconds the noise would be loud and then get quieter by about 30%. (This is what the shop has told me since they have had the car for the past 2 weeks).

    I was told that the last of the ticking could be coming from a faulty lifter carrier, not keeping the oil centralized around the lifter. I was also told that it could also be oil viscosity, air in the lines still, or a gasket that's allowing air into the system. Oil pressure is good.

    The shop is currently researching it to its full extent, but I wanted to do my own investigation to help them along as much as I can. Any suggestions/help/whims would be much appreciated!
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    steven s

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    You sure it's not the VANOS?

    Tetris guest

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    VANOS tick sounds different than what I have.

    Update:
    After a conference call with the shop and the person that re-built the engine, we decided the next best step is to drop the oil pan and see if the oil pump/gasket are functioning properly and not letting air into the system. This stemming from the re-builder not replacing the oil pump/gasket on rebuild.
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    yahweh

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    What is your oil pressure at?

    Tetris guest

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    Problem found. Person that rebuilt the engine used incorrect bolt sizes, didn't torque the bolts, and put the gasket on backwards for the oil pump....
    [IMG]
    [IMG]
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    lcjhnsn

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    find a tree and some rope!
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    yahweh

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    ouch, so i take it scrapped the motor?

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