Vortec Max 6.0 Oil Pressure?

[07VMax]

on my 07 nnbs Vortec Max when the engine is at normal operating temp and at idle the oil pressure Gauge is just above 20 and cruising at 60mph it is just under 40. is this normal for a 33k mile truck?? every one of my other silverados have had just over 40 at idle and around 50 cruising

[jro909]

you need 10 psi per 1000 rpms....are you running synthetic?

[oldscsc]

The newer trucks don't run as high oil PSI as the older ones do.

[07VMax]

synthetic blend. i just dont like seeing the guage that low, i have an old jeep cherokee with 360k and it has better pressure lol

[desrtrat]

i would put a mechanical gauge on it and see what it is reading. your dash gauge may be having issue..

 

good luck

[steemerboy2007]

my truck has never went past50psi running synthetic or reg oil... I have put over 125000 on it without any issues

[Kingpj]

New to this group. I jus bought an 07 vmaxx with l76 engine. Was wondering if the low oil pressure with bad pump or a stock pump going out could cause a lifter collapse

[Chuck Henry]

I have a 07 silverado 1500.vortec max.on cold start oil pressure is 40.gets hot drops to bout 12psi at idle.is this normal.6.0 engine

Edited November 12, 2019 by Chuck Henry

[Jeffery Porter]

I have a 04 that does the same thing. Idle hot 500 rpm and gage drops to about 10 psi, touch the gas and goes to 20. Only thing left to replace is rod bearing.. No noises, Hot or Cold, I'm stumped. Any ideas out there..??

[Jeffery Porter]

Same issue on my 04 5.3. I was told rod bearing won't help the low pressure @ 500 rpm. I'm thinking rod and main bearings, I don't have any more ideas.

[swathdiver]

46 minutes ago, Jeffery Porter said:

Same issue on my 04 5.3. I was told rod bearing won't help the low pressure @ 500 rpm. I'm thinking rod and main bearings, I don't have any more ideas.

What about your pickup tube o-ring?  They usually fail around 160K miles.  Quick way to check is to overfill motor with an additional 2-3 quarts of oil to submerge o-ring.  If pressure rises, you have identified culprit.

 

The OP in this nine year old post, that's normal for an aluminum engine.

[Jeffery Porter]

New o ring, new oil pump, new sender unit. No noise, just low pressure at idle.

Driving I have 20/30 1500 to 1800 rpm.

[swathdiver]

On 12/31/2019 at 10:54 AM, Jeffery Porter said:

New o ring, new oil pump, new sender unit. No noise, just low pressure at idle.

Driving I have 20/30 1500 to 1800 rpm.

Well, you are above minimums, you can check the pump spring, maybe run a slightly thicker oil or just drive it until you schedule an engine overhaul/replacement.

[Jeffery Porter]

I just switched to Rotalla 15w40. Helped a little on pressure. My only problem is sitting at a red light and my pressue is about 2/4. 195k on engine. Thinking of meling 296 hv oil pump, seems to help the idle issue. I have a new meling 295 pump now, didn’t help much over stock pump.

[highmileslowsmiles]

Jeffery Porter, 
Did you come up with anything else?

Same issue -276k mile L76 - haven't replaced pump yet. (Already did relief valve in pan, valley cover without dod/afm, new pressure switch)

[Jeffery Porter]

No,

40 hot @ 1800 /2000 rpm with 5w30 m1 is the best I got..