Engine/Transmission (1998.5 - 2002) Engine oil temp, what's safe.

[motobret]

Hey,

I installed an engine oil temp gauge a coupla years ago. During highway pulling I used to run around 220-230 degrees F. Lately I have been hovering about 245-250 degrees. I haven't made any changes lately. I am wondering what temps others are seeing & any suggestions as to why my temps are running hotter as of late.

Thanx

Brett

 

[Mundgyver]

I have been running a Oil Temp Guage for years. Traditionally the oil temp will run 10 to 15 deg F. hotter than your coolant temp. These engine cool the oil temp by a heat exchange with the water at the filter module. So if you are towing in heat, your oil will run hotter. The highest temp that I have seen on my oil is 245 deg F. Normal temp is 195 to 200 for me. 245 was pulling a very long hill called horse ridge in central oregon with a 8% grade in the middle of the summer. Outside temp was 94 deg F. This is one reason why I run synthetic only in my truck. Synthetic oil will stand up alot better to the heat.

 

[motobret]

I guess I may need to be concerned as it runs at 245 pretty much all the time. The water stays around 190, and has never changed. I only have 70,000 miles on the truck and cannot imagine why the temps would be so high without other signs of heat or failure.

 

[Vaughn MacKenzie]

I would suspect your temp probe. Your wiring might not be making good contact or the probe itself is tweaked.

 

[Turboman]

Where is the probe? Mine is in the top of the filter housing. I also see about 10-15* hotter than the water temp, but I've never seen more than 230* for a few minutes. In all our big trucks, the probe is in the pan and they all run about 20* or so less than the water.

 

[motobret]

Yeah, my probe is in the filter housing. I will check my connections, I may even have another sending unit around. That would be an easy fix if that was all there was to it.

 

[Mundgyver]

I also run mine off the second port on top of the filter. My 245 deg F. that I have seen was with 23,000 lbs of trailer loaded up and a very long hill. Normal temp is 195 to 200

 

[TDaub]

I'm using a dipstick sensor right now, been there 2 weeks and I'm tired of it already. I broke my dipstick handle messing around with it(Don't ask). any way what size NPT is that on top of the oil filter?



T. Daub