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Thread: M20 Head swap

  1. 08-09-2005, 05:14 PM #1
    XandX325e
    XandX325e is offline Member
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    Question Help! i got head problems

    I have an 85 325e with about 220,000 miles and i have 50 psi compression on cyl #4, the rest are fine. So i figured if im gonna pull off the head might as well rebuild it all. Can i swap it with a 88 325e head, i heard those heads have bigger valves. Is there anything else i should do. also what should i check for when i have my head off and disassembled. any other information on this head or other possibilities would be greatful.

    thanx, Garren
    Last edited by XandX325e; 08-09-2005 at 05:55 PM.
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  2. 08-09-2005, 07:06 PM #2
    ryan_george's Avatar
    ryan_george
    ryan_george is offline Jesus Christ Monkey-Balls
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    Are you sure that the low compression is because of the head? Rings may be shot as well.
    The 88 325e head does have larger valves, but it also has a larger combustion chamber. This would drop your c/r too low, and you'd lose too much power.
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