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Still Rockin A Stock 151 4cyl?

Discussion in 'Intermediate CJ-5/6/7/8' started by Dylan Brownfield, May 9, 2017.

  1. May 9, 2017
    Dylan Brownfield

    Dylan Brownfield New Member

    Lake Forest, CA
    May 9, 2017
    I have a 1980 CJ-5 with its original 151 Iron Duke, and its original SR-4 behind it. I'm just looking for restoration ideas to bring the engine bay looking back to factory.

    Also, how many people are still driving on these motors? How reliable have yours been? What are some common problems?
  2. May 9, 2017

    homersdog Tulsa, Ok 2020 Sponsor 2019 Sponsor

    Tulsa, OK
    Jan 8, 2012
    I used to have a 1980 with the iron duke. It was as reliable as they come. Had quite a bit of power too.
    This is a scanned picture of it from around 1990 parked next to my 71.

  3. May 9, 2017
    Howard Eisenhauer

    Howard Eisenhauer Super Moderator Staff Member

    Tantallon, Nova...
    Nov 22, 2003
    Moved to correct forum.
  4. May 9, 2017

    Daryl Sponsor

    Bonney Lake, WA
    May 25, 2006
    Great motor. If they have been maintained with regular oil changes they seem to run forever. Unfortunately they usually weren't maintained and had a really poor radiator which ended up overheating many of these. It used to be a great way to get a cheap set of 4.10 axles and the bellhousing from chev to T-4 was worth several hundred alone back before the Novak ones came out. As such these have always been sought after more to part out then to drive.
  5. May 9, 2017

    jpflat2a what's that noise?

    Riverside CA
    Jul 30, 2003
    Oil leaking, rod knocking GM engine. AMC always got screwed with these late V6 and 4cyl engines.
    I could write a book about all the problems we had with these engines in Jeeps.
    It kept the service bays full and the mechanics busy, especially the oil leaks.
    They leaked oil the day the transport dropped them off on the lot.
    The 151 had a noisy valve train and bottom end.
    Pontiac Puke is what I called them.
    Saw a 151 in a Scrambler puke the camshaft out the block at 7K miles.

    I would never own a Jeep vehicle with a 151 or 173.
    But....that's my opinion.

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