Re: Low oil pressure
I leave both reliefs in the engine... The engine doesn't need to produce a lot of pressure to work properly. My 59AB runs 60 lb. at speed hot and 33-5 lb. hot at idle, but it's practically new- 8ba pump with the pressure relief and has the valve up forward also.
You might want to see that the pressure relief valve spring forward is intact, but I would not shim it, or stretch the spring... If you have the original pump, you may want to replace it with the 8ba pump... I run good used pumps, new ones that are good may be hard to find...
Karl
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