Well, I found out at least part of what is wrong with it. I took off the valve cover and found two bent pushrods on cylinder 4. The exhaust pushrod was sitting loose in the head and was no longer under the rocker arm. It has a slight bend to it that is just barely detectable by rolling it on a flat piece of steel. The intake pushrod is bent into an S shape and was stuck in the rocker arm. The intake valve moves freely but the exhaust valve moves very hard and rough. I do not know what could have caused it. The engine oil has no water in it and the intake and exhaust ports looked fine when I changed the manifold gaskets. The valve stems also looked straight and relatively clean with no hint of rust. Has anyone ever gotten stuck valves loose without pulling the head?
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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