Oil Pressure on C6

[tonyhood]

Hey just wondering about the oil pressure on my C6. It seems to run around 35PSI at idle and low speeds, and about 40 PSI at around 2000 RPM. In comparison, my C5 runs about 40 PSI at idle and almost 50 PSI at 2000 RPM. Any reason for that? Or is this normal. By the way, fresh 10-30W Mobil 1 in both cars.

 

[c4c5specialist]

HI there,
Your lubrication system for c6, LS2 is different from that of your c5.
Hence, the different pressures.
Allthebest, c4c5

 

[tonyhood]

Thanks for your input. I thought that might be the case, and I figured someone out there had the answer. I appreciate your help.

 

[Dave C. '04 Z06]

I believe the lubrication systems are the same between the LS2 and the LS1/6.

The difference in pressure is probably gauge accuracy or bearing clearances.

The LS-7 does have a different lubrication system, however.

-Dave C. '04 Z06

 

[c4c5specialist]

I believe the lubrication systems are the same between the LS2 and the LS1/6.

The difference in pressure is probably gauge accuracy or bearing clearances.

The LS-7 does have a different lubrication system, however.

-Dave C. '04 Z06

Hi there,
No, they are different.
Here is the lubrication diagram for Generation 3 small block, from 1997-2004

 

[c4c5specialist]

Hi there,
No, they are different.
Here is the lubrication diagram for Generation 3 small block, from 1997-2004

And here is the lubrication schematic for Generation 4 small block from 2005 on.

Allthebest, c4c5:W

 

[Dave C. '04 Z06]

???

uuuhhhh....those two illustrations look like they're describing the same system to me.


They moved the lifters apart in the LS-2 illustration so you can see the flow better, but the diagrams are the same.

Obviously the lifters are not that far apart in the LS-2 motor otherwise they would not contact the single camshaft, which is the same as the LS1/6 cars.

-Dave C. 04 Z06

 

[c4c5specialist]

Ok, then lets talk something else.
Are you aware, that the LS2 is the exact same block as the displacement on demand block that is in the trucks???? And that this blocks oil galleys are larger in diameter>>>>And that the lifters had to be moved vertically also???
And yes, it is much more than just an exploded diagram. Look closer at the main bearing feed compared to the camshaft bearing feed, as there is a longer distance in between the 2.
We are not talking about lifters, or camshafts, we are talking about lubrication galleys and feed dimensions, nothing more, nothing less.
Allthebest, c4c5

 

[Dave C. '04 Z06]

Okay, yes it is the same DOD block.

No, they didn't move the lifters. They use different lifters which are oil pressure activiated switches. They oil to these is controlled by a oil control manifold which bolts into the lifter valley.

The Corvette LS2 (as well as the GTO) does not have this function, however it does have the higher capacity oil pump.

Oil galley size doesn't determine the oil pressure. It's pump capacity vs. leakage (IE: Bearing clearances).

The reason his new C6 reports a different oil pressure than his C5 is because the LS2 has different bearing clearances, stronger pump, or inaccuracies in the gauge (whether it was the C5's or the C6's).

That all being said, the bottom, final line is that the oil pressure is different because it is a different engine and different car.

Also, the illustrations cannot be used to determine if something is farther away from something else. They are only to show routing and are not to scale.



-Dave C. '04 Z06

 

[c4c5specialist]

I believe the lubrication systems are the same between the LS2 and the LS1/6.

The difference in pressure is probably gauge accuracy or bearing clearances.

The LS-7 does have a different lubrication system, however.

-Dave C. '04 Z06

Ok, I was confused, because this is what you said before.

 

[c4c5specialist]

Okay, yes it is the same DOD block.

The reason his new C6 reports a different oil pressure than his C5 is because the LS2 has different bearing clearances, stronger pump, or inaccuracies in the gauge (whether it was the C5's or the C6's).

That all being said, the bottom, final line is that the oil pressure is different because it is a different engine and different car.

-Dave C. '04 Z06

And this is what you posted later.
Sorry for the confusion, c4c5:confused

 

[Dave C. '04 Z06]

When I stated it's a different engine in a different car, I wasn't saying that the LS-2 engine has a completely different oil system which causes different pressures. I was stating that the engine is different than his LS-1, and also different from another C6's LS-2. Two different LS-2's, with slightly different clearances, will have different pressures. There is a tolerance for engine bearing clearances, and the tighter the clearance the higher the oil pressure.

You originally said that the reason his C6 had different pressure than his C5 was that the system was different. Although the system is marginally different to allow for the oil manifold, for all practical purposes they are the same. And the differences that exist are not responsible for lower oil pressure.

And between 35psi and 40psi is not much of a difference, anyways.


-Dave C. '04 Z06

PS: Are we really spending this much time on this topic??

 

[Remo]

PS: Are we really spending this much time on this topic??

Two very knowledgable people coming to a resonable agreement. I enjoyed the discussion very much.

Remo:cool