Oil Pressure

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  #1  
Old 04-13-07, 11:35 AM
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Oil Pressure

What is the proper oil pressure for a 1990 GMC Suburban 1500 with a 350 engine?
 
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Old 04-13-07, 12:32 PM
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Welcome to the diy forums!

While I can't say specific to your motor, 30-40 psi is pretty much the norm for most engines. Cold oil/engine will be higher than one that's reached operating temp. What pressure do you have?
 
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Old 04-14-07, 03:43 AM
Join Date: Mar 2007
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Smile oil pressure

I have a 1990 Chevy C2500 with a 350 cu. in engine that the gauge reads 30 psi oil pressure. Remember it is the pump that produces the pressure but it is the camshaft and crankshaft bearings that sustain the pressure, if they are worn you will loose pressure. I would try a heavier motor oil if you think that might help.
 
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