Thread: LSx Oil pump
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Old 10-25-2017, 12:02 PM   #2
KirkEvil
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Quote:
Originally Posted by PolarBear View Post
I took apart the oil pump I have to port it and I notice that the gerotor pieces have sharp edges. Does anyone know whether I should knock the edges off with a file, or will that reduce the output?
Also, does anyone know where to get a shim kit for the pump spring? It is a used pump, so I am not sure what pressure it will make, I am thinking of shimming it right off the bat, but I am not sure how much shim it would need
Don't knock the edges off. Also be aware those internal pump gears have a chamfer on one side but not the other. If you install them backwards they seize when the front cover is bolted down.

Use 2 standard thickness washers to shim the relief spring. That should give you about 45psi hot idle
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