The Ford Barn - View Single Post - 32 Sedan Plodder Flatty. Will packing the relief valve improve idle oil pressure?

Adam/Mill Valley CA · 10-22-2022, 08:40 AM

Mart, you and I had communicated about this issue by PM. If you recall, my poured bearing motor was showing zero psi at idle after a long freeway run, and about 18 psi at speed. Main bearings showed .0035 thou clearance. Replaced a no-name offshore 8BA style pump with Mellings M-15 hi volume pump (8RT pickup). Now, 45 psi at speed, 15 psi at idle after a long hot freeway run. Front valley relief #50 spring was shimmed 1/4". No excessive leak from the back labyrinth main seal. This is with Valvoline 20/50 VR-1 oil, I will change to a 10/40 oil for cold weather driving (cold meaning 40 degrees here in the SF Bay Area). Will this extend the life of this motor, which runs really well, cruising at 55-60 mph on the freeway? I have no idea, it just may be treating my psyche-will report back further when I have a few thousand additional miles on it.

Adam

10-22-2022, 08:40 AM	#11
Adam/Mill Valley CA Senior Member Join Date: May 2010 Location: Mill Valley,CA Posts: 276	Re: 32 Sedan Plodder Flatty. Will packing the relief valve improve idle oil pressure? Mart, you and I had communicated about this issue by PM. If you recall, my poured bearing motor was showing zero psi at idle after a long freeway run, and about 18 psi at speed. Main bearings showed .0035 thou clearance. Replaced a no-name offshore 8BA style pump with Mellings M-15 hi volume pump (8RT pickup). Now, 45 psi at speed, 15 psi at idle after a long hot freeway run. Front valley relief #50 spring was shimmed 1/4". No excessive leak from the back labyrinth main seal. This is with Valvoline 20/50 VR-1 oil, I will change to a 10/40 oil for cold weather driving (cold meaning 40 degrees here in the SF Bay Area). Will this extend the life of this motor, which runs really well, cruising at 55-60 mph on the freeway? I have no idea, it just may be treating my psyche-will report back further when I have a few thousand additional miles on it. Adam __________________ 1936 pickup, stock, black 1965 Mustang coupe 289/4bbl, black/red 1971 Alfa Romeo GTV 1750 coupe, dark red/tan 1970 911E 2.2 litre dark blue/black 1968 BMW R50/2 US, black (m'cycle) 1967 Triumph TR6R , sea foam/cream (m'cycle) 2022 Royal Enfield Interceptor 650 red (m'cycle) 1974 Honda CB750 red (m'cycle) 2000 Kawasaki W650 blue/silver (m'cycle)