1. #1
    TerryMason's Avatar
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    Four Cylinder 2.5Liter Jeep engine Specs

    AMC first introduced the inline 4 2.5L engine back in 1984. Back then, the engine was carbureted, but at the engine matured fuel injection was introduced. This engine was used on Wrangler TJ, Cherokee XJ, and Wrangler YJ.
    Last edited by TerryMason; 04-01-2008 at 04:15 PM.

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    TerryMason's Avatar
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    Four Cylinder 2.5Liter Jeep engine Specs - Technicals

    This applies to the 1984 through 2002 AMC four cylinder.

    Displacement150 cubic
    inches
    Cylinder numbers (front
    to rear)
    1-2-3-4
    Firing order1-3-4-2
    Spark Plug gap0.033 to 0.038
    Ignition timing9 to 11 degrees
    Idle speed (auto)600 +/- 70 rpm

    (manual)




    680 +/- 70 rpm
    Engine oilAPI SE of SF
    - Oil capacity4qts
    Automatic Transmission
    Fluid
    Mercon ATF
    - ATF Capacity4qts
    Last edited by TerryMason; 10-20-2009 at 10:55 AM.

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    98Chero's Avatar
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    Re: Four Cylinder 2.5Liter Jeep engine Specs

    what should be the compression reading in lbs per cylinder for a engine with low miles.

  4. #4
    Clarks Jeepn's Avatar
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    Re: Four Cylinder 2.5Liter Jeep engine Specs

    That says engione oil capacity 4 quarts. must not be including the filter. mine take five quarts to reach the full line on the dip stick.

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    TerryMason's Avatar
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    Re: Four Cylinder 2.5Liter Jeep engine Specs

    Clark - what year is your Jeep? Is it after 2002?

  6. #6
    Clarks Jeepn's Avatar
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    Re: Four Cylinder 2.5Liter Jeep engine Specs

    Quote Originally Posted by TerryMason View Post
    Clark - what year is your Jeep? Is it after 2002?
    Nope, 1990 2.5L 5sp manual

  7. #7
    Shandley's Avatar
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    Re: Four Cylinder 2.5Liter Jeep engine Specs

    Quote Originally Posted by 98Chero View Post
    what should be the compression reading in lbs per cylinder for a engine with low miles.
    The compression in each cylinder should be between 155 and 185 psi

  8. #8
    carnuck's Avatar
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    Re: Four Cylinder 2.5Liter Jeep engine Specs

    AMC first used the motor in the Eagle SX4 and Spirit (optional) in '83

  9. #9
    Clarks Jeepn's Avatar
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    Re: Four Cylinder 2.5Liter Jeep engine Specs

    Quote Originally Posted by Clarks Jeepn View Post
    That says engione oil capacity 4 quarts. must not be including the filter. mine take five quarts to reach the full line on the dip stick.
    I have actually wondered about that dip stick ever since I got the Jeep. You are absolutely sure it is four quarts? Maybe that it is why it drips oil all the time... hmmmm.

  10. #10
    JohnnyO's Avatar
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    Re: Four Cylinder 2.5Liter Jeep engine Specs

    The owner's manual for my '97 says 4 quarts with filter.
    Steeler Nation does not have to travel. We're already there.
    '97 TJ 4-banger restoration project. My daughter's rig but I buy stuff and tinker with it.

  11. #11
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    Re: Four Cylinder 2.5Liter Jeep engine Specs

    Is the 95 capacity same?

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