Re: $%&#ing Lifter Tick Again?!

Posted by Tim Cole On 2020/1/30 19:09:08

Typical rule of thumb on oil pressure is 10 psi per 1,000 rpm.

So 10 psi at idle is fine. 40 psi at 2500-3000 rpm is fine.

The last Packard engine I did was a 56 with all new parts and an NOS oil pump. It had 55 psi on the road and around 10 psi at idle using 10w-30 oil.

The black exhaust is either rich mixture or poor ignition. Either makes for dirty oil and those motors are not very clean so there may dirt floating around. Leaking rings will show up as blue smoke during hard acceleration. Oil leaking via valve guides and seals is indicated by blue smoke at idle especially after starting or standing idle.

Another possibility is worn guides and sticking valves. Worn guides will show up as a motor running better when squirting light oil down the carburetor while running, and sticking valves as quiet valves while spraying Gumout down the carburetor.