So...decades ago previous owner deactivated a cylinder to use as an air pump to inflate tractor tires. Now, that lifter is stuck in the up position. Dead miss and wheezing sound. I've tried GENTLY tapping it back down, to no avail. Going to pull the side cover and see if I can rectify the situation.
Last edited by Crowbar65; Mon Jun 21 2021 02:02 PM.
Soak it good ,maybe will get a good result Marvell mystery oil might clean it up enough .Someone might have a other secret recipe for freeing it up .Also check the valve ,you should spray some by the valve and valve seat.
Everyone has a "secret sauce" so here is mine. ATF(the GM stuff, I don't know the Ford stuff) mixed with acetone. 50/50. Let it sit and tappy tap tap. Repeat and repeat. What you probably have is some rust bonding in the bore. Pull the oil pan off and turn the engine to the cam heel for that lifter. That will give the biggest gap between lifter and cam(just a safety tip). Squirt some up into the lifter bore if you can. No abrasives, and no rush. It can take days. Squirt, soak, and tappy tap tap. Cool beer seems to help.
It's not uncommon to convert an engine into an air compressor. Thousands of Model A Fords were modified like that to run jackhammers by running the engine on two cylinders and compressing air with the other two, but it required a special cylinder head. I've also seen a 302 Ford V8, and several flathead Ford V8's converted that way. It would require a bunch of modifications other than just disabling a valve to get fresh air, instead of an explosive fuel/air mixture into the tires! Nothing like launching a John Deere into orbit with one little spark!
Several years ago, I had a tire inflator that was installed in place of a spark plug to pump air, but it had a rubber bladder and a one-way check valve, and it didn't put the fuel mix into the air hose. It just put the unburned idle mixture for that cylinder down the exhaust pipe. Jerry
The murder victim was drowned in a bathtub full of Rice Krispies and milk. The coroner blamed the crime on a cereal killer!
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Update.... Finally got the lifter out. I made a puller to get it started on its way to freedom. These lifters are LONG. Thought I was pulling a wisdom tooth. It was grungy. Cleaned it up, checked the bore and cam lobe, lubed it with white grease and it slid down all by itself. Put the side cover back on. Grrrrr.... Going to let it sit a day, fire it up, warm it up, set the valves. Then, BRAKES ! !