Deard Pirate Roberts Posted September 3, 2018 Report Share Posted September 3, 2018 I’m working on a Lister JP3. I have removed the heads and noticed that some of the openings that pass from the head through the crank case are open and some are plugged. If this is for cooling why are they plugged? Head 1, 3 plugs heads 2and 3 no plugs. Regards Scott Link to comment Share on other sites More sharing options...
RLWP Posted September 3, 2018 Report Share Posted September 3, 2018 To balance the cooling water flow through the heads. With all of them open, the water favours one head over the others Link to comment Share on other sites More sharing options...
Deard Pirate Roberts Posted September 3, 2018 Author Report Share Posted September 3, 2018 I guess that’s why the head with the most plugs is the closest to the pump. I thought the others had corroded and dropped into the case. Thanks for the advice. Link to comment Share on other sites More sharing options...
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