Z/YA

iTrader: (36)

I have a 00 Z28 with 107K on her. I just did a cam swap (XER273HR-14 224/230 581/592) a couple of months ago and I am noticing at ideal I am running at 20psi or a little lower at idle once the car has warmed up. At cold start I am at 40psi or higher.
I do have a 100hp of nitrous on the car but have not sparyed it this summer as I am waiting to get it tuned for the 37lbs injectors


I have a new SLP pump to put in it just have not gotten around to changing it yet, I am also going to switch to 10W40 instead of 5W30.

I am hoping this takes care of my problem and that it is not bearings, although if it was it would not be totally bad thing as then I would have an excuse to pull the motor and put in a forged rotating assembly

99LsOne

iTrader: (2)

I'm cammed with no nitrous and I'm having the same exact problem. Idk why either. If you get any insight on this shoot me a pm.

98RedBird

iTrader: (77)

Try swapping the oil pump and the sender first since you have the parts.

Also, while you're in there check the back side of the cam retainer plate to make sure that the seal back there didn't get nicked in any way when you were swapping it out. And as always, be careful with the oil pump o-ring when you install the new pump.

MasterSe7en

i had this same problem on my old 95Z i know its a different motor, but it turned out to be cam bearings, once they were replaced oil PSI was perfect once again...thought id shed a little light on this one for you guys hope this helps!

KRAZY K 2000 TA

iTrader: (5)

wow mine has the exact same numbers after SLP oil pump install yesterday

onefast84

Check the oil pump o ring. It's very easy to pinch or not seal correctly.

Juicy J

iTrader: (5)

Yup. That is a common problem after a cam swap I would put money on it that this is causing your problems.