Posted by ricb on January 16, 2014 at 05:56:48 from (70.215.4.133):
I have a friend that has a JD 4450 that had a drip of antifreeze leaking from the head gasket. It leaked less than 1 gallon a year & the tractor doesn't get 200 hrs a year. I would have just added until it got worse but he couldn't leave it alone. Head came off cleaned up & new gasket. While doing this they discovered the turbo felt "loose". Replaced it & thought all was well...started it and the exhaust was blowing oil. Checked turbo, again " loose". Got another. Started it, still blowing oil. None of this was going on before they pulled the head. Had JD tech out, cause we farm dummies can't' put a turbo on a tractor. He says turbo fine. Engine may need to be tore down. I can't believe this is possible because the tractor didn't use drop one of oil before they pulled the head. Who has ideas on what it might be? Has anyone run into similar problems?
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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