While I do not discount your diagnosis, you are also not seeing the BIG PICTURE. There is more than one problem that can cause this condition. A flat cam lobe can also cause this. A blown head gasket is even more likely. Logically speaking, problems with intake valves are rare. Intakes to not see the heat of combustion passing by as exhaust valves do. Intake valves are simply not stressed to the same level as exhaust valves. Head gasket is another potential cause. If a gasket is blown out between two cylinders, it can cause compression pressure from one of the affected cylinders to exit through the intake of the adjacent cylinder if that cylinder is on its intake stroke. There are several potential causes to this problem. The most important thing is to do diagnosis and not to get tunnel vision.
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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