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Thread: E38 resurrection- any tips for removing calcium deposits

  1. #1
    Join Date
    Feb 2013
    Location
    Brisbane, Queensland, AUS
    Posts
    182
    My Cars
    '89 535i, '00 735i sport

    E38 resurrection- any tips for removing calcium deposits

    Hi all, am in the final stages of cleaning everything prior to reassembly. Anyway, after lifting valley pan I have discovered quite a few areas where the gasket has failed and very hard calcium deposits have formed on the gasket fitting surface! Any recommendations as to how to dissolve this without damaging the aluminium?

    Also, rather than detach the crimped lower cover which overlays the oil pumps inlet (to allow cleaning of the timing guide remnants from the wire strainer), I decided to disassemble the pump instead. This allow pretty easy cleaning of the entire pump and I flicked out all of the debri tucked under the outer crimped cover using a combination of a large bent safety pin and a piece of flat packing tape. There is no gasket to worry about though I have to wait for my Bentley service manual to arrive for the torque settings!
    thanks John

  2. #2
    Join Date
    Oct 2009
    Location
    Rutland, Vermont
    Posts
    4,398
    My Cars
    E30 E38 E46 E85 F150 GTI
    Maybe try Simple Green Like Scale Remover?

    Also here's a torque value guide. It's all keyed to the TIS, was very helpful.
    http://e38.org/M62torques.pdf
    2000 740i Sport | 2004 330xi | 1988 325i Vert | 2003 Z4 2.5 | 1995 Ford F150 | 2018 GTI

  3. #3
    Join Date
    Nov 2012
    Location
    Westfield IN/Hinsdale IL
    Posts
    208
    My Cars
    2006 750Li, 2005 V70R
    Vinegar soak.

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