Blk09Chevy

I finished the swap on my truck with a forged ls3 with cam everything is brand new inside. I start it up and it runs good only thing was tune was bad then battery died on next start up. Next day I start it after charging battery and the low oil pressure light comes on and the guage stays at about 5psi. Engine light is off and the motor doesn't get overheated. I changed the oil pressure sending unit and still just going to 5psi. I changed oil to 10w30 and still the same. Any help on what else I can look at or just a bad cluster or maybe tune?

Blk09Chevy

Tuner didn't wanna really mess with it cause the low oil pressure light was on

Blk09Chevy

Could it be the plastic galley plugs on the block I don't think machine shop put them in?

Three6GMC

iTrader: (11)

What kind of oil is being used? This is getting way to common these past few months. Reason I say is 4 motors here local all started to have very low oil pressure and all have been using Royal purple. A couple of factory motors and a couple built. Now I know it's a stretch but this is the most I have ever seen at once of a group of motors failing due to low oil pressure. Now yours might not have anything to do with the oil, like stated above could be missing something but a buddies fresh motor from a reputable engine building is experiencing the same thing. I know everything was checked and not missing anything as it builds good oil when cold just falls all the way down when warmed up.

Blk09Chevy

I was told to use non synthetic so right now I'm running 10w30 pennzoil oil. But when I start truck I don't even get any oil pressure it just stays around 5-10 psi. But I think it's the little barbell plug that I'm missing.

Mr_Safety

iTrader: (2)

I just went through this as we'll. my issue ended up being the new cam bearings I had the machine shop install. They were installed incorrectly. But I tried all kinds of others stuff first could be your pick up tube o ring, can retainer plate, oil pump pressure relief valve or a couple other things. If you had good oil pressure the first time you ran it I would start with the o ring. Mine had low oil pressure from the start and got worse around 500 miles later.