OK, I want to update this and try to get some more help.
I pressure tested the oil cooler and the air compressor and they're both good. I wasn't able to find a radiator pressure tester, but it wouldn't have done much good as you can't just jerk the pan off this engine cause it sits in a cradle with supports underneath that are too close.
I put everything back together and ran it with the overflow tube in a bucket of water. Had quite a few bubbles at first and then a few more after a couple of minutes, then the bubbles stopped. I let it run for 30 minutes or more while checking for any bubbles, but had none. I noticed in the manual that you're supposed to bleed the system of air when you pull it down as far as I had it, but that was after the fact. I pulled the oil plug on it the next morning and no sign of coolant. I ran it 30 more minutes and no bubbles at all this time. We ran the hydraulics on it to put a load on it too.
So I figured that the little bit of water in the oil that I'd found originally (just enough to be noticeable and cause the steam out the blowby) had came from a pretty violent 4" rain that we'd had a couple of weeks ago. I figured that the rain cap had gotten blown up and an exhaust valve was open to the cylinder.
We decided to start crushing again on Thursday. As soon as we started putting a load on it, it blew coolant out of the overflow tube but stopped shortly after. It's a little low on coolant in the radiator but runs perfect otherwise with oil and temperature normal. When you add coolant to it, it pushes it back out until it gets down to the same level which is below the bottom of the radiator neck.
There is still no sign of coolant in the oil after two days of running. I'm having the crew to check for moisture in the filler cap and to make sure there's no steam coming out of blowby tube as it's out in the country and I've got an urgent miss in another 6068 in an excavator that I was moved to.
I'm wondering if combustion is getting underneath a liner flange and pressurizing the radiator causing this?
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Today's Featured Article - Show Coverage: Godfrey, Illinois Country Days - by Cindy Ladage. Except for last fourth of July's Old Gold show in Springfield, Illinois, I don't remember when it was so hot. Nevertheless, the heat didn't keep vendors and visitors alike from enjoying the third annual Country Day's Event. Jane Elliott said the event was originally a one man show. "Barry Seiler, owner of Country Town Farm Supply store used to invite people up to the Johne Deere store. He would give hats and a free meal for everyone that brings a tractor." Elliott said while this
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