The sprayers work from the pressure of the oil pump. What you are saying is that above 4000 RPM, there is no oil available to the pump. Would this be because these early engines do not have a tray?

Last edited by truckernix; 11/01/2009 3:49 PM.

1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!