oil pressure issues
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 984
Likes: 23
From: Florence SC
oil pressure issues
Here we go, I've got a friend that has put a 6.0 LS motor out of a truck into his jeep. They changed the cam and added a carbureted intake to the motor before install. They had some problems initially getting oil pressure but ended up pressurizing the block (somehow)and the oil pressure came up to normal. Fast forward about a year, it took that long for the jeep to be completed and it "was" just started occasionally, it has just lately hit the streets. The owner did a romp on the motor (about 6500+- rpm) and the oil pressure dropped to zero on the mechanical gauge and it didn't not come back up. I'm told after disassembly everything looked perfect inside the motor and they blamed the lack of oil pressure to the cam retaining plate not completely sealing a oil passage. The oil galley was air pressurized and they had a some leakage at this plate. They were told @ the dealership this plate has to be replaced every time its removed. Is this a sure enough a requirement during a cam change? Any information concerning the need for replacement of this plate will be appreciated. Bottom line, do I need to get a new one on hand for my LS1 cam change. I hope this makes sense. Thanks 
Le Mans Master
Joined: Aug 2007
Posts: 6,473
Likes: 297
From: Orange Park FL
Many cam changes and I never replaced the plate.
Question: Did they replace the small o-ring gasket (rubber) on the oil pickup tube, where it bolts to the oil pump ? That seems to be a problem area even if the old gasket looks perfect. Sometimes it will not re-seal.
Question: Did they replace the small o-ring gasket (rubber) on the oil pickup tube, where it bolts to the oil pump ? That seems to be a problem area even if the old gasket looks perfect. Sometimes it will not re-seal.
Last edited by pit-man; Apr 20, 2014 at 08:32 AM.
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 984
Likes: 23
From: Florence SC
They said they did but I wasn't involved in the cam change. I can't see that seal bleeding all of the oil pressure off. I think the pump was sucking air at that pickup tube. They did check and the barbell in the rear is in place also.
Le Mans Master
Joined: Aug 2005
Posts: 5,375
Likes: 328
From: CA.
St. Jude Donor '13-'14-'15
VERY important to not only replace the oil pick up tube O-Ring BUT to make sure it doesn't pop out when you re-install --It happens quite often !!!
ALSO what oil pan are you using ?????
WHICH port are you using on the engine for the oil pressure gauge ??
ALSO what oil pan are you using ?????
WHICH port are you using on the engine for the oil pressure gauge ??
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 984
Likes: 23
From: Florence SC
Problem resolved, found out the guys put a blank over the cooler ports. Cant do that, it must have a special blank that allows the oil to circulate from one port to the other. Originally put the engine back it and still had no OP, change the plated and got 40PSI Idling hot and 60PSI off throttle. 
