cals400ex

iTrader: (27)

will a ported oil pump cause a lower oil pressure? i am looking into buying a car that has a fair share of aftermarket parts on it and i noticed it reads around 20 psi at idle. will the ported pump cause this? it does raise with rpms so i am not too concerned but i was more or less curious.

Hardtop00SS

iTrader: (17)

if the oil pickup o ring gets ripped or pinched, it will cause low oil pressure. Who did the work? Does the guy know what he doing? It's a common problem when people are installing an oil pump that the ring get pinched or ripped if they're not paying attention. The oil blows pass the o ring and can't build pressure.

Lurius

iTrader: (7)

Yea, thats low for these motors. usually around 40 or so, sometimes higher.

-Lurius

cals400ex

iTrader: (27)

i knew that was a bit low. i think lingenfelter performance ported the oil pump. i will have to ask the owner for sure though.

quick346

iTrader: (4)

the o ring is on the pick up tube . so it won't blow past it what happens is it sucks air instead of pulling oil up out of the pan. def should be fixed a.s.a.p in my opinion

cals400ex

iTrader: (27)

so you dont' think a ported pump will cause a decrease in pressure?? you think it is more than likely a bad pump or bad o-ring?

TNTramair

iTrader: (15)

a ported oil pump does just the opposite...it increased oil flow and pressure. if it was just replaced than its probably the o-ring like everyone says.

98trans-am

iTrader: (4)

i thought with porting when you increase volume, you should see a decrease in pressure? or maybe thats if you dramatically increase the size of the port.

98Camarod

iTrader: (43)

Porting just increases the volume not the pressure. Shimming the oil pump is what increases pressure.

cals400ex

iTrader: (27)

i kind of figured porting it would decrease the pressure as well. maybe it is better off replacing the whole pump with a new one......i just hate to replace that o-ring and still have the problem.

Lurius

iTrader: (7)

2x

-Lurius