how do you prime the oil system on an ls1 since theres no hole to stick a shaft in and prime the pump.

 

I am just going to crank the motor over from the crank bolt to move a little oil. I wish I new the right way, if there is one, as I will be firing up my new motor very soon.

 

Pull the fuel pump fuse from the fuse box and crank it over. If you REALLY don't want gas getting in, you can disconnect the fuel line and cover it with a rag to make sure absolutely no fuel is getting in (again, only with the fuel pump fuse pulled though).

 

I just looked in a book I have on LS1 motors, and they said to unplug the coils and turn it over for 4 seconds.

 

Just to be on the safe side I'd unplug the coils AND pull the fuel pump fuse; no fuel, no ignition source = no problem!

 

I am with tbojbob.

 

Well it doesn't matter if it's getting spark if there is no fuel. It won't start without fuel. Any way you want to do it though. Different strokes.

 

ls1howto.com says to unplug the coil packs.

 

Someone told me that NAPA sells something to bolt inplace of the Oil pressure sender and will add oil and pressurize the system!
Phil

 

cranking engine will will not work....not enough RPM. You need to get a externally pressurized tank with oil in it and hook it up to the oil temp senser boss.

Tom

 

for the pump, I bought one in ebay ported and polished, and still have doubts, for installation oyu have to dissasemble the pump and slid the gerotor in the timing snout WITH (I think 2mils) of clearance each side, lube gerotors in 90 (!) oil (I think this is for guarantee sucking power when first fired) and my pump came with stock spring presure (I double checked) so I opted for putting two SS washers in the cap for increased preload on the spring, locktigthed everithing (BTW from the porting shop mine came with one striped bolt... SHAME ON YOU!)
and worked absolutly amazing, almost no delay in oil P at startup a very faint tickling from the filling lifters for about 2 seconds, and the oil P (indicated) at iddle was 3/4 of instrument pannel, (Vs half from stock) this was all at start up (cold)
i DID PREFILLED THE OIL FILTER THOU!

 

When I got my engine made a small aluminum plate that would bolt on the cover plate just above the oil filter. There are two holes under it. Drilled and tapped a hole on the left side of the plate to accept a 1/8 npt pipe. Screw the pipe in the hole and get a cheap lube pump from Autozone and pump oil until you feel some pressure build up. Turn the crank over by hand once or twice and repeat until you have a quart or two in it. Turn the plate around and repeat the process. It will fill all oil galleries and pump oil throughout the entire engine.

 

i put oil in the filter and start the bitch. if i the needle jumps up your good.

 

Do a search for how to prelube lsx engines. I posted it a couple of weeks ago. I used a small block chevy oil pump. 10-03-05

 

most manufacturers reccommend turning the motor over with spark/fuel disabled.

 

Thats the way Im talking about!

 

I just installed my 408 and we pulled the spark plugs out, filled the oil filter , pulled the fuel pump fuse and cranked the motor with the starter after about 10 seconds it had full pressure

 

yeah if you pull the plugs out it won't be building compression and will spin ALOT faster. thats what i would do if i wanted to prime the system.
but out of over 80 or so cam installs and a few dozen motor installs i've never primed any of them. it takes about a second and a half to get full pressure even with brand new motor. if you count to three and there is no pressure you have a problem.

 

compound problems