First of all thank you to everyone that posted help for me. You are all very generous to take the time to help me.
Let me clarify a few things for you experts out there to make sure I am on the right track.
I noticed the loss of power directly after adding in RESTORE engine lubricant. I used it because the engine was huffing and puffing a lot of smoke and oil out of the breather tube and making a mess. I also filled the crankcase with 20W-40 oil.
My first assumption was that the RESTORE and thicker oil had caused a valve to become stuck. However when I pulled the access cover to the valve springs off, both valves appear to be moving just fine and both lifters are rotating. Does this mean the valves are not stuck? I would assume that if one was stuck that it would at least be tapping when the engine is running? None of the valves are tapping.
After the above experiment I pulled the air shroud for that cylinder head off and discovered that a mouse had made a nice little nest in there. This led me to assume that the nest had blocked enough air flow so as to overheat that side of the engine. I also noticed that both plugs where very hard to remove from that side of the engine.
I would love to have dirty valve stem as opposed to more serious damage. Given the above description do you think it’s a stuck valve or something worse? Should I try draining the restore and running something thinner through the engine to see if it frees up the valve?
Is there a way to remove and clean the valves without removing the cylinder head from the block?
As for drilling out the bolts, how do you keep the drill bit centered on the bolt so that it doesn’t drift over to the head and cut the softer aluminum instead of cutting the bolt? On a mill this would be easy but with the engine still in the tractor and the cylinder head still bolted to the engine I have to use a hand drill.
Thank you so much for all the info. Its fire season out here and I really need the unit up and working to clear before the next big fire hits us.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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