Cummins 4BT & Diesel Conversions Forums banner


  1. Jeep CJ7 tachometer

    Cummins Tech Section
    Need some help. I’ve got a 1987 4BT in my 84 CJ7 which came factory with a tach, that I’d like to keep. Will I need a new tach? If not how do I wire this one up? My mechanic mentioned something about Autometer selling something to attach to the alternator but he wasn’t very sure. Any help is...
  2. Block heater wiring

    Cummins Tech Section
    Got a question, My engine came with a block heater but the guy who pulled the engine from the bread truck cut the wire mid length and trashed the plug. Im trying to wire a new plug on the wire and Looking at the end that screws on to the block, it appears that either wire can go to hot or...