If you pull the pan and get the crank in the right position, you can inspect the cam bearings without pulling the cam. If you can see the bearing protruding from either side of the boss, it's walked out. My #2 cam bearing walked as well. Thanks for the info on how to change them without pulling the motor!
If your cam bearing has a chunk out of it, that material is everywhere. I wouldn't suggest just replacing a bearing or two. How's that lifter and cam lobe look? Since it was recently built (a few miles), you might get away with some things you normally wouldn't such as any DOD issues (didn't catch which gen of LS).
DOD delete in a C5 z06 , 54-56 at start up, once oil temp get up 200+ pressure has progressively dropped to 20 or less at idle and no more than 40 at any cruise or acceleration.
That's still within spec of 10psi per 1000rpms. But I would check pickup tube oring and at the same time the oil pan is off I would do a relief valve delete in the oil pan if equipped.
I have the same symptoms in a 02 gmc yukon denali with the lq4 6.0l and I already changed the oil pump with a fresh oring not shure what or ware to look next I have had the yukon for a year now and it has 471k on the clock mabey it's just tired idk but I would love to keep it going to see how many more miles I can get on it
It's almost always just the o-ring on the pickup tube that goes into the oil pump.. unfortunately if the engine is inside the vehicle the oil pan has to come off and the entire front of the motor so you can get the timing cover off
@@hill_customs6807 thanks. I replaced pressure valve inside oil pan and added one Lucas Heavy Duty Oil Stabilizer. Now my hot idle is 26-30 psi. I didn't check that oring unfortunately (( but it's new and replaced 6 months ago
@@hill_customs6807 I hooked up a manual guage on my 05 Yukon Denali. Cold start is at 40psi, when it's hot it idles a little above 10psi. When I accelerate it shoots back up to 40psi. My instrument cluster reads 20psi cold start, when it's hot it slowly drops down to zero and goes up to about 5 psi when I accelerate. The engine runs good, no knocking no tapping or shuddering. Should I be worried?
I think this is my problem oil. My oil pressure very low Chevy subarban. 2011 edit oil pump o Ring Everybody said come bearing LS engine, I didn't think so. It's good to engine Everybody have a problem with oil pressure. How to stop the Camshaft bedding Walk around
@@hill_customs6807 he’s talking about the other o ring on the pickup. it’s rare that it messes up since there’s never any need to touch it but i’ve seen it happen
If a cam bearing has come out why? Bad bore to be driven in they should only move if it locks to the cam and spins. Otherwise this is just a shi!!y setup all around.
No one really knows. But usually its after a rebuild. And probably worn bores. And aftermarket bearings. Happens more on aluminum blocks i can say for sure.
If you pull the pan and get the crank in the right position, you can inspect the cam bearings without pulling the cam. If you can see the bearing protruding from either side of the boss, it's walked out. My #2 cam bearing walked as well. Thanks for the info on how to change them without pulling the motor!
Really great video, and hits all the important points
If your cam bearing has a chunk out of it, that material is everywhere. I wouldn't suggest just replacing a bearing or two. How's that lifter and cam lobe look? Since it was recently built (a few miles), you might get away with some things you normally wouldn't such as any DOD issues (didn't catch which gen of LS).
Great detailed video mate, cheers 👌🏼
DOD delete in a C5 z06 , 54-56 at start up, once oil temp get up 200+ pressure has progressively dropped to 20 or less at idle and no more than 40 at any cruise or acceleration.
That's still within spec of 10psi per 1000rpms. But I would check pickup tube oring and at the same time the oil pan is off I would do a relief valve delete in the oil pan if equipped.
I have the same symptoms in a 02 gmc yukon denali with the lq4 6.0l and I already changed the oil pump with a fresh oring not shure what or ware to look next I have had the yukon for a year now and it has 471k on the clock mabey it's just tired idk but I would love to keep it going to see how many more miles I can get on it
i have 15 psi on hot idle only ... what could be the reason?
It's almost always just the o-ring on the pickup tube that goes into the oil pump.. unfortunately if the engine is inside the vehicle the oil pan has to come off and the entire front of the motor so you can get the timing cover off
@@hill_customs6807 thanks. I replaced pressure valve inside oil pan and added one Lucas Heavy Duty Oil Stabilizer. Now my hot idle is 26-30 psi. I didn't check that oring unfortunately (( but it's new and replaced 6 months ago
2010 camaro ss 6.2 liter changed oil pump and sensor still 5 psi hot idle
Tear it down and diagnose. Prob a cam bearing or something.
Or if your done with it let me know we buy them broken.
thank you for the insight
Why didn't you mention the oil pressure relief valve in the oil pan? That's another place to look at.
Sorry this video doesn't represent the 2007+ motors with the displacement on demand systems
@@hill_customs6807 I hooked up a manual guage on my 05 Yukon Denali. Cold start is at 40psi, when it's hot it idles a little above 10psi. When I accelerate it shoots back up to 40psi. My instrument cluster reads 20psi cold start, when it's hot it slowly drops down to zero and goes up to about 5 psi when I accelerate. The engine runs good, no knocking no tapping or shuddering. Should I be worried?
@@madwestboy yes you need to have it looked at. Sounds like the oil pump pickup oring has failed on that.
So much for "never look at the cam bearings " deal
I think this is my problem oil. My oil pressure very low Chevy subarban. 2011 edit oil pump o Ring Everybody said come bearing LS engine, I didn't think so. It's good to engine Everybody have a problem with oil pressure. How to stop the Camshaft bedding Walk around
Where are u located
Utah
@@hill_customs6807
Utah? Goddamn!
Sometimes the o ring on the oil pick up under the windage tray goes bad causing a lost of oil suction to the oil pump.
Yes. The oring was explained in the video. 1:20
@@hill_customs6807 he’s talking about the other o ring on the pickup. it’s rare that it messes up since there’s never any need to touch it but i’ve seen it happen
New subscriber 🔥🔥🔥🔥
We always get them pinned
If a cam bearing has come out why? Bad bore to be driven in they should only move if it locks to the cam and spins. Otherwise this is just a shi!!y setup all around.
No one really knows. But usually its after a rebuild. And probably worn bores. And aftermarket bearings. Happens more on aluminum blocks i can say for sure.
@@hill_customs6807whats the best fix, if a cam bearing has walked out after a rebuild