I apologize ahead of time that this is so long but I want to make sure I cover everything I can think of.
Ok I've done oil cooler 3 times in 2 years now, after this time the delta was 20+ degrees the next day. After research and weeks of looking for a new bypass valve I found that BPD sells them for $20 without having to buy the whole housing, installed it today and went out for a test. Air temp outside was around 50 coolant 189-199 oil got up to 225 before I got off the highway (it seemed to be still climbing). I'm about to beat my head against the wall what else could cause this? Truck has 175k miles stock bolts, gaskets, injectors, turbo, sct tunes by Tony Wildman, straight 4", custom egr delete(made my own delta kit by plugging front cover where it comes out of intake and rerouting coolant out of the cooler and back into the heater hose under the degas bottle. Also the truck will lose coolant and get hot but only if on the highway for extended time pulling a load (im thinking it's flash boiling the coolant in the oil cooler because the oil is getting so hot, can't test that theory till I fix the EOT problem though) otherwise it will keep the same coolant level for weeks, no signs of head gasket problems that I can find.
I do work at a shop on my days off from the FD, I don't consider myself anywhere close to a real mechanic especially diesel but I have turned a wrench or 2, that being said I have access to pretty much any tool you could think of so someone please just tell me what I can try.
Thank you so much!
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Ok I've done oil cooler 3 times in 2 years now, after this time the delta was 20+ degrees the next day. After research and weeks of looking for a new bypass valve I found that BPD sells them for $20 without having to buy the whole housing, installed it today and went out for a test. Air temp outside was around 50 coolant 189-199 oil got up to 225 before I got off the highway (it seemed to be still climbing). I'm about to beat my head against the wall what else could cause this? Truck has 175k miles stock bolts, gaskets, injectors, turbo, sct tunes by Tony Wildman, straight 4", custom egr delete(made my own delta kit by plugging front cover where it comes out of intake and rerouting coolant out of the cooler and back into the heater hose under the degas bottle. Also the truck will lose coolant and get hot but only if on the highway for extended time pulling a load (im thinking it's flash boiling the coolant in the oil cooler because the oil is getting so hot, can't test that theory till I fix the EOT problem though) otherwise it will keep the same coolant level for weeks, no signs of head gasket problems that I can find.
I do work at a shop on my days off from the FD, I don't consider myself anywhere close to a real mechanic especially diesel but I have turned a wrench or 2, that being said I have access to pretty much any tool you could think of so someone please just tell me what I can try.
Thank you so much!
Sent from my SAMSUNG-SM-N915A using Tapatalk