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Ol' Ron · 11-09-2017, 11:29 PM

I think we don't understand the oil pump system, The relieve valve is deaifned to protect the pumpand bearings from excess oil pressure. the 60 lb poind relief setting will start dumping excess oil through the relief port, this creats excessive heat in the oil (opening the valve) OIl is used to keep the bearings cool from the power loads placed on the oil in the bearing by flushing it out with cooler oil. By using a higher viscosity oil this delays the cooling process. Fortunately in most cases ths does little harm, But there is a reasion why the newer engines are using thinner oil.

11-09-2017, 11:29 PM	#10
Ol' Ron Senior Member Join Date: May 2010 Location: Chester Vt Posts: 8,860	Re: Oil pump "rebuilding" I think we don't understand the oil pump system, The relieve valve is deaifned to protect the pumpand bearings from excess oil pressure. the 60 lb poind relief setting will start dumping excess oil through the relief port, this creats excessive heat in the oil (opening the valve) OIl is used to keep the bearings cool from the power loads placed on the oil in the bearing by flushing it out with cooler oil. By using a higher viscosity oil this delays the cooling process. Fortunately in most cases ths does little harm, But there is a reasion why the newer engines are using thinner oil.