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  1. G

    Help!!!!!!! Detroit 12v71 oil pressure problems

    Clearly I will be getting oil returning back down but I'm hoping to see it from somewhere I shouldn't. I'm sort of thinking it could be one of the individual o rings under the head. I wouldn't see nothing externally as there is a seal all the way round the block but it could be getting back into...
  2. G

    Help!!!!!!! Detroit 12v71 oil pressure problems

    Cheers for the advice guys! I'm going to get the sump off again tomorrow and see if I can make something up to connect to the port on the bottom of the block where the pump sends the oil rather than through the gauge hole as its only 1/4 npt. Hopefully I will see something. Clearly
  3. G

    Help!!!!!!! Detroit 12v71 oil pressure problems

    I can get hold of one yes. Am I right in thinking it would need to fill the whole system including the sump with air before I seen any pressure on the gauge as the air would go through the system and return as if it was going back to the sump?
  4. G

    Help!!!!!!! Detroit 12v71 oil pressure problems

    1.6 bar @ 600rpm and 4.2 @ 1800. I will have to check again to see what it had flat out. I'd imagine over 4.5 bar when it was up to 2200 rpm.
  5. G

    Help!!!!!!! Detroit 12v71 oil pressure problems

    That is possibly yes. But like I said the company that rebuilt it have supplied a run up sheet and everything was fine supposedly. I know these engines have individual o rings and fire rings under the head for dealing the bore, coolant and oil. It is possible that one could be leaking but there...
  6. G

    Help!!!! Detroit oil pressure problems

    Hi I hopefully somebody can help me as I'm pulling my hair out now. I have a Detroit diesel v12 71series (2stroke) that I am having oil pressure issues with. I know the pressures on there's engines are not mega high usually. The engine has been rebuilt and 'tested' by a local company a while...
  7. G

    Help!!!!!!! Detroit 12v71 oil pressure problems

    Hi I hopefully somebody can help me as I'm pulling my hair out now. I have a Detroit diesel v12 71series (2stroke) that I am having oil pressure issues with. I know the pressures on there's engines are not mega high usually. The engine has been rebuilt and 'tested' by a local company a while...
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