LSXFORMULA99

iTrader: (12)

i have a brand new 370, i have the oils un hooked and fuel pump fuse out, while cranking the engine over several long times it wont build oil pressure, but will pump oil out the turbo feed line??

95maroz28

iTrader: (21)

without it running? i think it needs to be running to build pressure

LSXFORMULA99

iTrader: (12)

yeah without it running, and i have a 5.3 truck and when i un hook the coils and fuel pump fuse it build 40 psi.

When other friends have done the same to their engines they all built pressure

S10xGN

iTrader: (11)

Pull the spark plugs, and crank away. You'll see pressure eventually.

LSXFORMULA99

iTrader: (12)

do you really think it will eventually build pressure? i was starting to lean towards the back oil plug might not be in place, i no for sure i have the front one but never checked the rear....a few moths ago my buddie ran into the same problem and it was the oil plugs, i just dont want to pull the trans and flex plate if i dont have to

S10xGN

iTrader: (11)

Worked for me, my engine hadn't been run in 4 yrs. If you're getting some oil (BTW, where are you feeding the turbo from?) actual "pressure" can't be far off. Are you verifying with a mechanical gauge?

LSXFORMULA99

iTrader: (12)

stock gauge, brand new sensor. and im getting oil for the turbo right above the oil filter..

S10xGN

iTrader: (11)

Temporarily remove the turbo line and plug in a mechanical gauge, it's the only way you can be sure. Factory gauges are as good as idiot lights...

ModularTurbo

iTrader: (14)

plug that turbo oil feed line.

A.R. Shale Targa

iTrader: (2)

Pressure is resistance to movement....I had this same dilemma with an old
472 caddy, it pushed out a 9/16 plug in the lifter valley. My money is on the
dumbell....sorry
Correction....I just checked my ls book and if your filter is full and since the
turbo feed line is spewwing it sounds like the barbell is in, however it does
say to JB weld the front welsh plug next to the oil pump for added security
or else the pressure will be nill. Maybe you can pull the H2O pump and cover
bolts to get a peek while cranking.

LSXFORMULA99

iTrader: (12)

thanks guys. pulled the tranny to find the barbell in, put a gauge in turbo feed hole and cranked it about 1 1/2 min and finally got 50psi!!!!! guess i just needed to crank longer lol. sucks i pulled the trans for no reason

Z28/2002

iTrader: (27)

I had the same issue with my motor. Called the builder and he said start the car, fired it up and held steady at 55 psi.