Osman

I am in process of putting my LT1 engine back together and i want to prime it before i try to start it. On LS engine you would do it by removing plug located on side of engine and run oil at 20psi or what ever.

Looking at side of LT1 engine, there is two plugs.. Are those there for priming? Which one is it ? Anyone know ??

Osman

for future reference... its the top one...

Track

Thanks! Did you figure out the bottom...just open to the sump?

Osman

Bottom goes right into engine, nothing back there..

davepl

How are you pressure-priming it? I took a spare small block oil pump, some hose and fitting and a drill. It wasn't pretty but it worked. But there's got to be a better way!

Osman

Usually i would borrow pressurized preluber >>> SUM-CSUM9164

This time i used a J-45299 tool, which sucked since its manual and it took a while.

I was also not able to find a fitting which would fit in side of engine block as i pointed out in previous posts. So i ended up using EN-47971 Kent Moore tool which replaces oil filter and allows you to pressurize system from there.

T/A KID

Anyone know the thread size??
plan to do this tomorrow

T/A KID

Going to assume it’s a M16x1.5. Thread, of no response I’ll keep posted

DorkMissile

Not sure of the thread, but on my LT1 I just used a double ended 1/4" plastic push on fitting that pushed into the hole and sealed. Got the job done.

T/A KID

cool! Look forward to messing with it tomorrow!
if closer to that size I was pretty far off with my size guess ha

T/A KID

M12x1.75
for anyone in the future

C5 Diag

You should be able to do a “clear flood crank” where you hold the gas pedal to the floor and crank the engine...car will crank but not start since this inhibits the injectors from firing !!

T/A KID

you can easily perform clear flood by WOT (E92 factory is 80% and above is clear flood), along with disconnecting coils, which kills spark and fuel. NOt a bad idea to pull plugs as well.

BUT, the engine is still turning over without lubrication. Do many people do this? YES they do, but I would rather lubricate the entire engine then rotate it personally