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  1. 4-53 or 4-53T Jake Brake Valve Cover Steel

    General Classifieds
    For sale is a tall steel 4-53/ 4-53T valve cover that I made for Jakes on a 4-53 I had. It measures about 6.75in tall which is about .25in more than the cast iron spacer adds. It has been lightly bead blasted; paint it whatever color you would like. Asking $125 plus whatever shipping is. Can...
  2. Ever see a mechanical tachometer give a false high reading?

    Detroit, Perkins, Caterpillar
    Well my user name says it all, I don't know jack about diesels, but I'm beginning to learn more then I ever wanted to know. I recently purchased a piece of equipment that uses a 4-53 (late 70's). My question is: Is it even possible for a faulty mechanical tachometer to give a false high...