6,0 chevy gas

put 12 quarts of oil in it and still only 10 psi, can anybody help me?

Every oil pressure issue is ether a bad pump, or leakage. Bad bearings or stuck relief valve. How can we help you? Jim

Don't look for any miracle cures.

If you know it really has low pressure, verified with a mechanical gauge, time to pull it out, tear it down, see what has happened.

Your going to at the least pull the oil pan and check out the oil pump. It could be some many different thing we all are just guessing.

I am not a fan of the 6.0 motors. They seem to be fuel hogs and have mechanical issues. My youngest son has had two different ones and both had issues at just over 100K on miles.

new O ring and new pump, stikk 10 #

The engine only takes 6 qts of oil. 12 qts would be really over full.

(quoted from post at 20:01:05 12/10/17) Your going to at the least pull the oil pan and check out the oil pump. It could be some many different thing we all are just guessing.

I am not a fan of the 6.0 motors. They seem to be fuel hogs and have mechanical issues. My youngest son has had two different ones and both had issues at just over 100K on miles.

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We have a bunch of 6.0 at work. We run the vans to about 200k and no engine issues.

With a new oil pump and you still have low oil pressure it just about has to be a bearing out of position. Likely a cam bearing. Your having it over full would negate any sump tube issue. I am afraid it is pull the motor time.

Oil pump is behind the timing chain cover, not the oil pan.
Not much chance of getting the poster to understand anyways. He was told over a week ago the oil pump has failed but he refuses to even accept the possibility. He is going to keep fooling around and running the engine until he wipes out the main and rod bearings.

Does this engine rattle and hammer like it doesn't have pressure or are you just concerned about 10 lbs. on the gauge. Don't know about the 6 liter but the 5.3 has a fine mesh screen under the oil sender, Google it.

The sending unit and "gauge" is not close to accurate under thirty pounds. If it has no other symptoms don't worry about it. Seen them run a lot of miles with low oil pressure.

Having spent $1000 are more on several different occasions fighting oil pressure/noise issues I came up with a way to eliminate the oil pump (down stream and up stream of the pump) a pump will not pump what it cannot suck.

I install a manual OP gauge and check pressure cranking off the starter disable the ignition are fuel. I am looking for at least 15PSI as soon as I hit the starter are RAT NOW not later.

If I immediately get OP the suction side and pump are OK I probably have a issue with bearings and possible lifters (yes a lifter are lifters can bleed enoufh to effect OP. I then drop the pan and apply a external pressure source and look for a extreme leak either at the crank, cam are from the returns form the intake galley. The intake would have to be removed to get a good look at the lifters.

If I don't get immediate OP off the starter I drop the pan and hook a vacuum gauge to the pickup. I should see immediate vacuum cranking off the starter if not I confirm the pickup is OK if its OK its the pump (a pump can not pump what it can not suck)

Sounds time consuming its cheaper than throwing money at it an ending up with a pile of junk.... You get paid well for diagnostic time but loss your arse on hopes and wishes...

A leaking pickup can overcome a bad seal it it has a healthy pump and every thing is in good condition upstream. You will see a delay in pickup time on the OP I have seen 15 seconds then the pressure pops up good. The problem is the oil becomes aerated from the leak you may have noisy lifters for awhile till it warms up but you have good OP.

With 10PSI only you have your work cut out for ya a suction test is the best way I know to eliminate the pickup and pump. From there the search is on, a rod bearing are crank bearing is two hafts it only takes one haft of a bearing on either to fudge up you OP. Its the norm for folks to say I checked one rod bearing it was OK that means the rest are OK if you go there check them ALL! BTDT got the T-shirt. :evil: It only takes ONE HAFT to throw OP off how lucky are you that by chance just happen to check that one....

I have had mechanics I respect much say OP is made at the cam bearings I agree as long as every thing before them is in tip top shape... Its a long road to come to that occlusion tho...

Back on 12-8 he posted he replaced the pump and O-ring and it did not help.

Missed that pump replacement post, thank you for the update . Did he install the high volume/standard pressure pump as he was told to do? Or just the stock replacement pump. If it is the stock pump and 5W-20 oil, oil pressure will be sparse at best .

Just a thought, the oil pan gasket on that engine has two ports that I believe seal to pressure on the way to the filter. This is a common leak point on that engine. I think it is theoretically possible that it could have blown out the gasket there towards the inside of the pan. Might be worth a look before tearing the engine down.

The original post says it's a 2003 with 150k miles. Just put a used 6.0 in it and get it back on the road. Used motors are everywhere.

(quoted from post at 16:50:57 12/10/17) put 12 quarts of oil in it and still only 10 psi, can anybody help me?

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There's a screen under the OP sending unit that collects debris. I understand it's a chore to get out, but is a common issue with the LS engines.