Low oil pressure ?ls2 ported ..

**Sayed_000** · 02-14-2010, 10:13 PM

While doing my cam swap .. i replaced the stock oil pump with the ls2 ported oil pump ..

the oil pressure seems good at the cold start "3/4" and the drops down to 1/4 after the engine warms up .. then i hear my lifters cracking .. until i rev it and get my oil pressure back!!

what should i do ..

please Help ..

**Mr. Luos** · 02-14-2010, 10:38 PM

Check o-ring on pump.

**Sayed_000** · 02-14-2010, 10:41 PM

thanks Mr.luos

I'll do

any other suggestions ?

could it be my engine ? someone told me its normal if i have high millage !?
am still in 95xxx !

**Mr. Luos** · 02-14-2010, 10:49 PM

Pressure should be pretty constant with a new(er) pump.

Were the lifters tapping before the new oil pump??

**Sayed_000** · 02-14-2010, 11:51 PM

NO .. They were new ls7 lifters ..

**Mr. Luos** · 02-15-2010, 07:38 AM

Were they pumped up before running?
Soaked in oil before install?

**Sayed_000** · 02-16-2010, 01:50 AM

i don't think so ..

thanks Mr.Luos for the help.. am taking the car to the auto part today ..

**HASTINGSRJ** · 02-16-2010, 03:57 AM

should have at least dipped the lifters in oil before install. And check the o ring on the oil pump.

**02fbody35th** · 02-16-2010, 01:39 PM

yeah, these are guys are right. I would put money on it that it is the O-ring on the pump. If not installed correctly the O-ring gets pinched causing the oil to airrate once it warms up causing a drop in pressure.

**Ryans99LS1** · 02-16-2010, 01:52 PM

more than likely pinched o ring. i doubt its due to mileage especially since you just did a cam swap.. my 98 just turned 192k over the weekend and sits at 36-38psi when fully warm.