PRIMING PUMP
You can make a GM-LS engine priming tool using just about any oil pump. I used a new big block Chevy M77 pump that I already had. I tapped the inlet and outlet to NPT threads and installed fittings to adapt to rubber hoses. The pressure side needs to thread into the galley behind the LS oil pump. It is M16x1.5 thread. The suction hose side will need to sleeve down to a 1/4˝ tube, which will go down the dip stick tube. Run the pump with a 1/2˝ drill. Now you can prime without using pressurized canisters, refilling or the mess.

Dave Sarno
SCH Racing Heads
Arvada, CO
March, 2022