l 95 Trans Am l

iTrader: (5)

Replaced oil pump and o ring today, the o ring looks like it had been damaged. Buttoned her back up and still low psi. At a hot idle it's about to kiss the red area. My question is this

I was told to prime the system by unplugging the coil packs and turning it over for 15-20secs and I should see the oil pressure rise. Mine didn't do this at all. So what if the sensor I bought went bad and is reading low. If it didn't read anything while cranking but reads 40psi at a cold start then that could indicate it's off a good 10-20 psi?

l 95 Trans Am l

iTrader: (5)

And still no knocking or tapping, just the usual noisy aftermarket cam valvetrain

Black01Bird

The next cheapest thing to check is going to be your opsu, after that it starts to go downhill and get expensive. I would buy a GM opsu and replace yours and see if your oil pressure goes back to normal, and then go from there.

l 95 Trans Am l

iTrader: (5)

That's what I'm thinking. The oil pressure used to be fine prior to cam swap. At 4k the pressure reads 40psi solid and does not drop

Black01Bird

That seems pretty bad, anything over 3k rpm my car sees 60+ psi, hot idle i get antsy if it goes under the 40psi mark lol. And my 01 has 118k on it now.

joecar

Which retainer plate did you put on (the newer design has chamfered bolt holes)...?

What did you torque those bolts to...?

Always2Slow

iTrader: (8)

I would be inclined to think your low oil pressure might have something to do with that cam bearing you replaced. Did you measure any of the clearances after installing it to see where your at? Did you use the correct O ring for your application? Are you sure you only scarred the front bearing and not any other?

l 95 Trans Am l

iTrader: (5)

I just stuck the old plate back on. Torqued them according to ls1 how to's write up (can't really remember).

I inspected the other cam bearings. They seemed fine. I actually had my dad do the cam bearing as he has had more experience with stuff like that. We did check the clearance though. I used the correct o ring as well, yes.

l 95 Trans Am l

iTrader: (5)

Found a video on my phone of the first start after the cam. It only put out 40sum pounds at the initial start. That was 2000 miles ago, the engine would've had to have fried by now if it really had low psi. I'm thinking the sensors faulty

RB02RAMAIR

Sounds like it's the sensor to me also..I broke my sensor also when taking my intake off to change the knock sensors & bought one of those cheap sensor's from Oreilly Auto parts & now my oil pressure jumps all around when I come to a stop. I would get one from GM.

chrisfrost

iTrader: (8)

To answer the OP's question as to where the oil line for a mechanical gauge "is" at the oil filter. There should be a small aluminum piece bolted next to the filter with 2 bolts. between the 2 bolts it protrudes and in the middle of the protrusion drill and tap a hole using 1/8" npt tap. Then at auto arts store They sell a copper line kit 4 mechanical gauges and included are the correct adapter to go from the 1/8" npt to the 1/8" copper tubing. I believe Autozone has the kit 4 about $10,,,,,comes with 6' of the copper tubing and 1 or 2 compression fittings and 2 adapters. Oh, and BTW, when "priming" the oil system, You should also unplug the injectors at the 2 main harnesses.

camoracer34

Just wondering if you ever solved your problem. Having similar issues myself.