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 - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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