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Compression leak in 2390
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JW
05-26-2009 16:58:55
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Have been using a 2390 on the disk this spring. Temp runs in the lower end of the green all day long. If you fill the radiator it will blow it out the overflow or out the neck if you start it with the cap off. Once it blows out about 2 gal its fine until you shut it down then it blows some more out the overflow. Is there a good way to figure out what head I need to look at? Any guesses to cause? Doesn"t run hot, no external leaks, and no water in oil. No blow by, lots of bubbling in radiator. I"m thinking head gasket.
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toolz
05-26-2009 22:20:17
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Re: Compression leak in 2390 in reply to JW, 05-26-2009 16:58:55
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Sure sounds like a head gasket, but either way, it's putting compression in the coolant. My 1175 did about the same thing a while back. I knew I was going to have to pull a head, so I took off all the rocker shafts, pulled the injectors, and pressurized the cylinders with rubber tipped blo-gun. #4 was the culprit, so the center head came off and got a new gasket. Sure easy to work on these motors- pull the intake manifold and slip the head out. I do wish that Case would have used alignment dowels for the heads, though. Just dive in there- if I can fix it, anybody can!
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Bugs
05-26-2009 20:29:07
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Re: Compression leak in 2390 in reply to JW, 05-26-2009 16:58:55
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I had a 1070 do this and it was that a small piece was broken off of the sleve lip at the top.The best I can remember is I pulled off water manifold on left side, took fan belt off so water pump would not turn, filled engine with water till water ran out manifoild ports, then started engine. I then could see which head had the air bulbs coming out of.
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