6.7 Cummins Engine Oil Temperature?

All newer trucks have buffered gauges. Keeps the worry worts out of the service department.

Brisk wrote:

Me Again wrote:

SolidAxleDurango wrote:

Cummins12V98 wrote:
It's a dummy reading. Just drive it and don't worry.

What do you mean a "dummy reading"?

He means that they are not actual readings sensor/gauge readings, they are made up numbers by the truck's ECM based on many things going on in and around the engine. Chris

Hmmm. Not sure I buy this (no offense). Can you provide any proof of this?

On our 2001.5 Ram it had a real oil pressure gauge. If the sensor went bad the replacement was a switch that pasted 40 on the gauge. Ram has been doing things like the for quite a few years. We are on our third RAM/Cummings and am active on the Turbo Diesel Register site. What I posted is common knowledge there and on other sites.

When Ron said just drive it, that is where we are at, these new trucks will not allow themselves to be hurt. Go forth an enjoy!

Chris

Me Again wrote:

SolidAxleDurango wrote:

Cummins12V98 wrote:
It's a dummy reading. Just drive it and don't worry.

What do you mean a "dummy reading"?

He means that they are not actual readings sensor/gauge readings, they are made up numbers by the truck's ECM based on many things going on in and around the engine. Chris

Hmmm. Not sure I buy this (no offense). Can you provide any proof of this?

Thanks for the replys. Yesterday climbing the grade heading south into flagstaff at 65mph with a stiff headwind grossing 21-22k with my high profile 5th wheel and 100* ambient temps engine temp hit 220 and oil temp hit 246. I wasn't worried about the engine temp since the fan was roaring and it cooled down quick once the road leveled out. But I had never seen the oil that hot.

SolidAxleDurango wrote:

Cummins12V98 wrote:
It's a dummy reading. Just drive it and don't worry.

What do you mean a "dummy reading"?

He means that they are not actual readings sensor/gauge readings, they are made up numbers by the truck's ECM based on many things going on in and around the engine. Chris

Water and Oil both flucuate on long hard pulls. Water temp usually goes up and down more quickly than oil temp which makes sense. The lower you can keep the water temperature it will keep the oil temp lower. Good thing to have a good transmission cooler.

Brisk wrote:
What oil temps are you guys seeing while pulling long grades??

Mine runs a bit higher than water/coolant temp.... 195 water means about 205-208 oil temp.

I have noticed that there is a direct relationship between turbo boost and oil temp (which makes sense, but I never thought about it before).....

Under normal circumstances on flat ground i'll pull about 4-8 psi boost and the oil temps will be in the 205-208 I mentioned above..

However, if there's a headwind/sidewind and I'm using 20 psi to maintain highway speed, I'll see oil temps in the 220-235 range. Without a corresponding rise in coolant temp.

depending on load, terrain, and outside temperature, I have seen as high as 30* degrees above engine temperature. keep in mind, engine oil is also used as a coolant in a desiel enginge. in the cummins, it has nozzles that spray oil up into the bottom of the pistons.

Cummins12V98 wrote:
It's a dummy reading. Just drive it and don't worry.

What do you mean a "dummy reading"?

I saw around 214 driving up in the mountains towards the lake over 4th of July week.