Posted by chadd on April 23, 2009 at 10:36:28 from (70.239.120.177):
I was working up the other day with the vibrashank. The engine oil pressure was fine (~65 psi @2400rpm) and the coolant was 7/8 of the way up the gauge where it usually is when it pulls hard (usually sits at 1/2 idling around, is this normal? Our 966 never leaves the C line). When I tried pulling it in 4th low, it began to overheat, so I went to 3rd. After I finished, I opened the radiator cap to find the following: 1)No steam came from the radiator, so it wasn't boiling and the coolant was over the grate. 2)No hiss of pressure upon removal of the cap, so it doesn't seem to have any pressure 3)The coolant in the radiator was only warm to the touch while the lower radiator hose was scalding hot 4)There are black clumps floating all over in the top of the radiator that were not there when I started. They look like oil. I had to add coolant before I started from sitting over winter, but there is no apparent external leak.
I am thinking either oil cooler or head gasket. Is there any good way to test which one it is without a ton of disassembly? Also, I am wondering how difficult the D-361 is to do engine work on. Is this a call someone with the special IH tools and knowledge deal or something that can be done by myself?
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