hanzel69

Ok, was drag racing car on my last pass... It's always the last pass... My oil pressure dropped. I get about 10 psi per 1000 rpms. It flucuates with the rpm's. I replace the oil pump with a ported LS6 one, still the same pressure issue. What else could be causing this? Any ideas, I couldn't find anything online. Thanks.

aaron653

iTrader: (1)

did you replace the o ring

heavy6.0

iTrader: (69)

o-ring, loose oil pump bolts, loose cam retainer bolts, low oil, clogged filter, to name a few.

hanzel69

I'll start there. The car doesn't tick or make any wierd noises, seems to run fine. I changed the oil and filter with the pump.

rocksws6

iTrader: (4)

I did all of those and I have the same problem. Only when its warm though. If its cool its fine.

blkbird

iTrader: (28)

I have the same problem and am thinking about checking the cam retainer bolts. No other weird noises coming from the motor......

02 BLK WS6

iTrader: (11)

Mine will go as low as 25psi at low idle when it is as hot as it gets. The pressure does go up with rpms. 10 psi per 1000rpm is normal for a race engine. The LS1 came off the assembly line race ready.

180ls1

iTrader: (4)

oil pressure sending unit might not be reading right. And also i switched from mobil 1 oil because it was too light.

sschkade

iTrader: (7)

I wouldn't call myself an expert, just throwing this out there... could it be the barbell restrictor? I don't see how it would get pushed out... but just a random thought.

veee8

iTrader: (40)

Take your oil filter and cut it open to inspect the media. If it has lots of metal and copper looking bits, you are scraping your bearings apart.

jmmullin

iTrader: (2)

oh gah. this is what happened to me after a h/c swap. replace the o-ring, and then sometimes you have to bend the pickup tube a bit in order to get it to the oil; before i had varying oil pressure, sometimes dipping into the red while idling, setting off the check gages light, then at cruise i was around 40 psi. After the o-ring install and bending the tube back, I am at 40-50 idling and 60 while cruising and accelerating. I have a ported ls6 pump from TSP.

hanzel69

I put a new O-Ring on with the pump, unless your talking about another O-Ring. I guess I'll check the sender and the oil filter. I know everyone says 10psi per 1000 rpm is fine. But the fact that the car ran at about 40psi for 56,000 miles, never missed a beat, then suddenly is giving me 10 psi at idle at 1000 rpms, and moves up with RPM's is BS, and anyone that thinks otherwise is deluded. Just throwing that out there after reading several posts saying it's fine, obviously it's not fine or the cars would have came from the dealer reading 10psi at idle. I'll try to check the pick up tube as well, and what is this barbell restrictor you speak of?

rocksws6

iTrader: (4)

The barbell restrictor is in the back of the block. You would have to take the back cover off to get to it. Probably not your problem. I don't like the low pressure at idle either. I don't know what causing it. I'm going to try a new oil pump if that don't fix it I'm building a motor.

slp--firehawk

doubtful but oil pressure sensor is a possibility, what does the sensor read peak pressure to be, and does that pressure comply with your bypass spring tension?

TireSm0ke

iTrader: (1)

Did you remove your intake manifold recently? If im not mistaken the oil pressure sensor is right behind it and it easy to damage.

hanzel69

Nah, I haven't taken off the intake, but I picked up a sensor/sender yesterday. I checked the pickup tube and stuff, all of that seemed fine. I hope to heck it's not a bearing.

TireSm0ke

iTrader: (1)

Guess its not the sender then... are you running the oil that youre supposed to? This is a long shot but if you were using oil with a big difference in viscosities from cold to warm, that might have some effect, although probably not. But on that note would you say this probably starts when you hit operating temp?

venom ws7

iTrader: (13)

What about the cam bearings??? a friend of mine had the same problem too.

Camaro396

iTrader: (14)

Today was the first time I drove my car in warm weather (95 degrees) with the new pump, normally on like 60 degree days, my oil psi at idle is 45-50 but today it was around 38-40 at idle. Wonder if thats normal? I also have a Melling LS2 pump.

regency

iTrader: (15)

your oil could be foaming!!! what type and weight