What would cause my oil to get too hot? I didn't have the problem until I had my oil changed. Now when climbing out of California or on 80 out of Salt Lake my oil temp warning comes on. The ambient air temp is warmer now than before the oil was changed. I have an ISX 530 HP.

 

Where did you get your oil changed?

 

Ambient air temp will affect oil temp somewhat. So will the load on the engine and how much oil is in the pan.

 

Do you have an oil temp gauge?

If not how do you know its too hot?

It should be the same as the water temp or lower

 

I had the same issue with a 07 565 thermostat in the oil cooler I think.

Mine would derate at 250f

 

The oil temp on my ISX runs 230 all the time while my water temp runs 190.

I had a oil themostat stick closed and the oil temp rose and shut the engine down. Part was cheap but the labor at a Cummins shop was a little pricey. I think the total bill was around $700

 

The oil cooler is the first cooler on the front. What sort of shape is it in? Are a majority of the vanes bent closed?

 

The oil cooler on a ISX is below the exhaust manifold on the passenger side. My ISX has a double oil cooler.

When it got pinhole in it I replaced it for $2,000

 

How does the engine fan draw air thru it down there? Seems like a great spot for an oil heater!

 

I thought the same thing when they pointed out my oil cooler to me. It bolts to the block and has your coolant flowing through it and I don't think air has anything to do with cooling the oil on a ISX.

I had oil in my coolant so I took it to the shop and they said the oil cooler has a hole in it so I asked how big a job. They pointed to the cooler and said about everything on this side of the engine has to come off..

I thought what a dumb place to put something you are trying to cool.

The oil thermostat is in the front of the block behind the ac compressor.......I never figured that one out either.