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Old 07-14-2015, 07:07 PM   #1
GMtrucknut!!
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Join Date: Dec 2011
Location: Attica,indiana
Posts: 264
Oil pressure gauge question

I am using the OEM oil pressure gauge in my 55 2nd series and when cold with my rebuilt engine it pegs the gauge upon startup when hot it goes just above the halfway mark. I am running 10w30 motor oil . The crank has been ground to 10/10 clearances were .0015 on the rods and .0025 on the mains . I am running a Melling M55HV oil pump. Does anyone else have this and has anyone every compared their oem gauge to another gauge which has increments marked ?
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