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  1. Grand Cherokee Diesel Discussions
    My coolant reservoir started blowing oil out on my 2015 JGC. It seems it may be either the head gaskets or oil cooler. I didnt notice any change in performance and I havent had any codes or overheating issues. Has anyone else had this happen? Any thoughts on troubleshooting steps?
  2. Grand Cherokee Diesel Discussions
    I've enjoyed my JGC for over 200k miles. Just noticed the distinct odor of coolant from under the hood. Had the dealer pressure test it and found that the oil cooler is the culprit. Not seeing any oil in the engine, but there is plenty of sludge in the coolant reservoir. Does anyone have...
  3. Grand Cherokee Diesel Discussions
    I have 42,000 miles on my '14 JGC Diesel. For the last few days, I have thrown a P0128 code, although it went away this morning. Computer reads that it is a faulty Engine Coolant Thermometer, although I am getting thermometer read outs on the dash, and now no issues on the code either... Any...
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