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  1. rosco

    cummins 250, popping out the intake

    Too much starting fluid has been known to bend them - even to tempory locking up the engine. The stuff detonates inside the cylinder..... Lee in Alaska
  2. rosco

    cummins 250, popping out the intake

    Naturally! But I don't recall that being an interferance engine. So maybe it just got tired of being the one left open for three years & stuck there/tappets tool loose/maybe a broken valve spring. The broken spring will let it hang down too far - then it can get bent. Lee in Alaska
  3. rosco

    cummins 250, popping out the intake

    Naturally! But I don't recall that being an interferance engine. So maybe it just got tired of being the one left open for three years & stuck there/tappets tool loose/maybe a broken valve spring. The broken spring will let it hang down too far - then it can get bent. Lee in Alaska
  4. rosco

    cummins 250, popping out the intake

    You can easily find which cylinder is not fireing : Start it slow and go out and hold your hand on the exhaust manifold port of each cylinder. They will begin to warm as each cylinder fires. The dead cylinder's port will be cold. With my luck, the problem is under that last valve cover. The...
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