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Thread: 225k mile S52 motor for sale

  1. #1
    Join Date
    Jul 2012
    Location
    Herndon, VA
    Posts
    625
    My Cars
    98 M3/4/5, RIP 528e

    225k mile S52 motor for sale

    SOLD SOLD SOLD!

    I'm selling the original motor out of my 1998 M3/4/5 and it has about 225k on it. I pulled it from the car last year due to what I thought was a blown head gasket and oil consumption. Turns out the HG is fine, my problem was due to incomplete burping of the cooling system. I purchased a CO2 tester and it didn't show any CO2 in the coolant system. It never overheated during my ownership (about 1.5 years at the time), and it ran great at rally-x and auto-x events. Here are the leak down numbers from a month or so before it was pulled. Cylinder one couldn't be tested due to the heli-coiled spark plug threads in the head, which came out with the plug. The plug went back in fine and was raced on without issue.


    #1 cold: XXX hot: XXX
    #2 cold: 98% hot: 97%
    #3 cold: 96 hot: 94
    #4 cold: 70 hot: 71 (air coming through crankcase, so rings are bad)
    #5 cold: 82 hot: 85
    #6 cold: 74 hot: 96


    This corresponds with the compression test results:
    1- XXX
    2- 230
    3- 220
    4- 190. Went up to 200 with oil added.
    5- 225
    6- 225


    As it sits now on the engine stand, it's pretty much just the long block. An 80a alternator is on it but not much else. The water pump, thermostat, M50 intake manifold, injectors, starter, and exhaust manifolds are all off the motor, but I still have them if the buyer wants them. Compared with the 175k engine I installed in its place, the internals of this engine were pristine compared to how the 175k engine looked. It was burning about a quart of oil every 500 miles.









    I'm located in Herndon, VA and would prefer to not ship this engine. I'm asking $1,000.

    Thanks for reading!
    Last edited by 95maxrider; 11-10-2018 at 08:52 AM.

  2. #2
    Join Date
    Jan 2004
    Location
    NY
    Posts
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  3. #3
    Join Date
    Mar 2011
    Location
    Cinci
    Posts
    114
    My Cars
    1998 M3/4/5
    Wish I’d seen this a month ago..

  4. #4
    Join Date
    Jul 2012
    Location
    Herndon, VA
    Posts
    625
    My Cars
    98 M3/4/5, RIP 528e

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