265 degree oil temp while towing!
Hey Guys,
So I recently had my engine rebuilt after burning a hole in a piston. I pull a 18-21k toy hauler so I added an external oil cooler. I went with a Derale 40 row cooler w/ an 800 CFM fan. I used the adapter from Mocal, 12an fittings and hose. My temp sensor is at the pre cooler port on top of the factory oil cooler.
With the trailer and pulling a pretty decent grade @ a 40-50 degree ambient I was reaching 263-265 pretty easy. ECT was probably 220-225. I was keeping RPMs up. Flat ground everything temperature wise was in check. Rebuild has about 2000 miles on it.
I know oil temps on these things is an issue while towing, that's why I added the external cooler, but I didn't think I would get that hot. I can't imagine what temps were before the cooler while towing! I didn't have the gauge until after rebuild.
So. Is this what I'm going to have to deal with? I assume I need to switch to synthetic after complete break in? I've cleaned the stack, have a bigger tranny cooler too.
Thanks,
Casey
PS. This is on an 06 3500 4x4 LBZ