knee-jerk says "head gasket", right? truck has had water in oil for 6 months now (not my truck!) Lately water consumption has gotten REALLY bad... before, the oil would be black with a thin layer of snot on top. Owner just limped it as it wasn't the primary driver. Decided that after it consumed at LEAST a gallon of water on a very short drive... the oil was changed and turned to almost pure snot with maybe 2-3hrs total run time.
Head gasket looked fine... then it hit us... how does water get in the oil without getting oil in the water? bad oil cooler would put oil in the water (oil cooler looks fine BTW)
head is cracked pretty heavily between the intake and exhaust seats... crack crosses both seats on some holes... lots of soot in the #6 intake port
crack on the #6 is burnt from the combustion into the throat.
one other symptom. after the truck has been sitting, it cranks and cranks and then belches a lot of white smoke... runs clean, no evidence of water out the exhaust.
only theory I've come up with is cracks have reached water... when the truck sits, it puts a decent amount of water in the piston dish, hence the white smoke on startup... and the water in the crankcase is getting there past the rings.
problem w/ that theory is the radiator isn't pressurized.
it's got us stumped... cracked block?
truck is getting a new engine, but curiosity is driving us nuts
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