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Correction: Connecting Rod.

Outcome: Finally got some time to do the pressure test, but never got around to it. I pulled the oil pan and saw one piston was scored on the outside. Push rod was bent and twisted. Seeing this I don't know what failed since I never removed the head covers but I'd guess it was the gasket. It...

Thanks Ken, I'm going to do the coolant pressure check as soon as I get some time. Might be a couple weeks, will update

I did check the dipstick first, it showed a very milky, chocolate milkshake looking oil. I was hoping it may have been something so simple. Do you suggest a drain everything, fill it up properly and run it for a while and see if I have the same situation before pulling everything? Ken, Did you...

I know this topic has been spoken about, I've read through it. I have a '91 M1038 6.2 and still very new to me. I drained the coolant and was very surprised at how little came out, a little over a gallon. As I was draining the oil the other day the first few seconds was pure green...