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  1. P

    Coolant Filter install - 2000 XJ

    OK I am going to sneak in a question. Is the coolant in 1990 XJ 4.0 engine forced to go to back cylinder through its travel or is it just passively expected to cool that area through wishfull thinking? The only other possibility is that I have blocked water jacket! mine over heats in funny way...
  2. P

    Dare I override my efan this way? ('00)

    in case of switched ground you can still figure out what to do, just watch out for error code.
  3. P

    Dare I override my efan this way? ('00)

    You can put a SPDT on. It will turn the fan on with 12 volt or the wait for the relay. Center connector on the fan wire, one side connector on the battery, the other where it was before ( the relay output ). Use a heavy duty switch, 30 Amps or so.
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