Low Oil pressure
Thread Starter
Heel & Toe
Joined: Sep 2023
Posts: 16
Likes: 2
Low Oil pressure
Morning all,
I know this subject has prob been beat to hell but if I do find it on forums there is never an answer to what resolved it lol.... So I have a 2005 base with a 6.0 Iron block that I just put together with torque v2 cam, new lifters, Rockers, pushrods and oil pump..... Issue that is happening is cold oil pressure is 44psi and with a couple quick revs (2k) it will shoot to 64psi...... Once motor is warm pressure starts dropping and will hit 6-7psi and then the warning indicator pops up on the screen but never goes to zero.... There are no strange noise's in the motor at all and oil on dipstick looks good....I will be ripping front of motor apart and cutting oil filter open to see if any flakes of metal are in there .I ordered a new oil pump and o-ring just in case but I wanted to get some insight from you guys..... Thanks
I know this subject has prob been beat to hell but if I do find it on forums there is never an answer to what resolved it lol.... So I have a 2005 base with a 6.0 Iron block that I just put together with torque v2 cam, new lifters, Rockers, pushrods and oil pump..... Issue that is happening is cold oil pressure is 44psi and with a couple quick revs (2k) it will shoot to 64psi...... Once motor is warm pressure starts dropping and will hit 6-7psi and then the warning indicator pops up on the screen but never goes to zero.... There are no strange noise's in the motor at all and oil on dipstick looks good....I will be ripping front of motor apart and cutting oil filter open to see if any flakes of metal are in there .I ordered a new oil pump and o-ring just in case but I wanted to get some insight from you guys..... Thanks
Le Mans Master
Joined: Dec 2013
Posts: 6,337
Likes: 5,113
From: Charles Town WV
2024 Corvette of the Year Finalist - Modified
2023 C6 of the Year Winner - Modified
2022 C6 of the Year Finalist - Modified
seeing as its a fresh build id put money on your pickup o-ring isn't seated. First thing I'd check once you get it back apart.
Thread Starter
Heel & Toe
Joined: Sep 2023
Posts: 16
Likes: 2
That's what I was thinking and hoping lol When I had motor on stand and did the cam you could see alittle bronze on the cam bearings some people say its normal some say no.... So I put the cam in and sent it LOL.... Thanks for the reply bro and opinion
Melting Slicks
Joined: Jun 2014
Posts: 2,228
Likes: 497
From: NJ
Seeing bronze is not good. And it's not bronze , it's copper. You wore thru the first layer of the bearing. And the cam bearings are fed first in the oiling system, so I'm thinking excess bearing clearance on the cam bearings creating a loss in oil pressure. There's too many holes in the bucket so to speak! The O-ring leak is also a possibility but that will aerate the oil by introducing air into the system. Is there any oil foaming? This can only be seen by draining the oil immediately after running up to temp.
Le Mans Master
Joined: Dec 2013
Posts: 6,337
Likes: 5,113
From: Charles Town WV
2024 Corvette of the Year Finalist - Modified
2023 C6 of the Year Winner - Modified
2022 C6 of the Year Finalist - Modified
lol... ive seen copper on 3000 mile brand new motors... I don't even look anymore, never had an issue. I wouldn't even sweat it OP, thats nothing compared to some ive seen.
Thread Starter
Heel & Toe
Joined: Sep 2023
Posts: 16
Likes: 2
(1hotrodz) sorry you are correct (Copper) I haven't checked for foaming yet I did buy motor used and I saw it running and had good oil pressure I guess if the pump and o-ring doesn't fix the issue motor is getting pulled and off to machine shop.....
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Melting Slicks
Joined: Jun 2014
Posts: 2,228
Likes: 497
From: NJ
Excessive bearing clearance? I would Mic the cam journals and the cam bearings first and then the rod and main journals and bearings to see what caused the low oil pressure. The difference between these numbers (journal and bearing) will tell you the clearance, I suspect they will be out of spec. Let us know what you find. And if you decide to measure, everything must be at room temperature, even the measuring tools like micrometers, T-gauges etc. Do it once, do it right.
Safety Car
Joined: Oct 2007
Posts: 4,206
Likes: 1,075
From: South Florida
How do you know the oil pressure is low. Tell me you didn't trust a single electric oil gauge. I'm sure you verified with a mechanical high quality oil pressure gauge.
Pressure is normal cold but bad when hot. Hmm isn't there something at the back of the engine that if left out or damaged causes this exact issue? The barbel perhaps.
Another possible is the oil pressure regulation spring wherever that happens.
And isn't there a plug or something at the bottom of the block, or under the front cover that has to be in place or this happens.
What i'm worried about is the machine shop leaving out a plug or barbell and then going 'oops' and instead of telling you the truth they make something up
"its your cam bearings" (put the plug back in and change the cam bearings)
Pressure is normal cold but bad when hot. Hmm isn't there something at the back of the engine that if left out or damaged causes this exact issue? The barbel perhaps.
Another possible is the oil pressure regulation spring wherever that happens.
And isn't there a plug or something at the bottom of the block, or under the front cover that has to be in place or this happens.
What i'm worried about is the machine shop leaving out a plug or barbell and then going 'oops' and instead of telling you the truth they make something up
"its your cam bearings" (put the plug back in and change the cam bearings)
Thread Starter
Heel & Toe
Joined: Sep 2023
Posts: 16
Likes: 2
I get what ur saying budd…. My bro in law deals with this machine shop all the time and apparently they know there **** but anything is possible…. I also checked with a reg gauge at front of the motor same thing….
