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streetdreams · 05-18-2020, 03:18 PM

"will ADD 5-15 psi..."?? Could this be a misprint? Piping oil from the main galley to the rocker shafts will actually cause a drop in pressure. "

No misprint. I always pressurize rocker assemblies on a Y Block. The spillover system from the factory is: 1) an oil leak directly to the oiling system, and, 2) does a lousy job of oiling the rocker arms, as evidenced by scored up shafts on just about every y block torn down for rebuild, because there is very little if any oil pressure in the rocker shaft.

You can argue modern oils vs '60s oil if you want, but I routinely get 30-35 psi oil pressure hot on any Y blocks I rebuild.

05-18-2020, 03:18 PM	#16
streetdreams Senior Member Join Date: Dec 2010 Location: Howell, Michigan, USA, The Peoples Slightly Overspent Demodependancy of Michigan Posts: 638	Re: y block oil pressure "will ADD 5-15 psi..."?? Could this be a misprint? Piping oil from the main galley to the rocker shafts will actually cause a drop in pressure. " No misprint. I always pressurize rocker assemblies on a Y Block. The spillover system from the factory is: 1) an oil leak directly to the oiling system, and, 2) does a lousy job of oiling the rocker arms, as evidenced by scored up shafts on just about every y block torn down for rebuild, because there is very little if any oil pressure in the rocker shaft. You can argue modern oils vs '60s oil if you want, but I routinely get 30-35 psi oil pressure hot on any Y blocks I rebuild.