how much oil clearance in engine main bearing?

5 Answers

  • 8 months ago

    It depends on how worn the "bearings" are.

  • 8 months ago

    The Chilton's manual for that engine will tell what the bearing clearance should be. You can measure it with "plastigauge". Go to the public library and look in the manual for your answer.

  • Anonymous
    8 months ago

    The service manual will tell you.

  • Dan
    Lv 5
    8 months ago

    2 thousandths of an inch - .002" is a common spec for an average automobile engine.

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  • 8 months ago

    There is no universal figure for that. 

    Engines differ in type and construction but also hugely differ in size. I own a tiny Cox glowplug engine which is much smaller than my thumb. I’ve also worked on gigantic marine diesel internal combustion engines which dwarf the house I live in. They don’t have even remotely the same main bearing clearances. 

    Unless you state the make and model of engine then you may as well have asked “How long is a piece of string?”

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