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| The truck is new to us and I don't have a complete history on it. I may pull the pan and check the regulating valve, while there I can check the rods and main bearings before I start in on the oil pump. Think I will land up doing the oil pump and reg valve and hopefully solve the problem. When it's warm the oil pressure never drops below 20 psi at low idle. I would expect lower oil pressure if the bearings were worn. The oil pressure is stable at low idle making me think it is something other than bearings.
Thanks for the input. | |
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Cummins M11 oil pressure issue
