Hi I just pulled a 62 1/2 ton home with a 235 donar motor for my '50 1 ton. This truck is fresh out of the barn and has been sitting for about 20 yrs it has 86k miles.I have oiled the cylinders and pulled the valve cover.The #6 exhaust is stuck open any advice on freeing it up without pullin' the head? Thanks.

Soak the valve stem/guide with ATF or Marvel Mystery Oil.Will be necessary to squirt it thru the openings in the valve spring.After soaking a day tap lightly on top of the valve stem slightly and see if it begins to move.Could also pry up gently on the cap on top of the valve while tapping...may take a few days.

have had similar problems with frozen valves in one of our old chevy 6 cylinders and it only sat for a couple months. seems the current gasolines lacking old time lubricants enhance the problem. agree mystery oil soakings and light tapping of valve stem will probably free the sucker. good luck, mike

Jackgas,

I suppose it goes without saying....

B-U-T note, BOTH said tap LIGHTLY....

Sort of like "EASY does it!!"

Bill.

Word has that the old farmer guy that parked it back in the 80's did so because of his eye sight going bad. I tend to believe the story cuz the doors,fenders,hood,tailgate everything has a dent in it except the bumpers,go figure?

Just a word of caution, I had a 235 truck engine that had set outside for 20 years,it had been pulled "Running when parked" that had some stuck exhaust valves, I unstuck them but the ones that were stuck also were almost rusted into down next to the head, I would have had a problem if I had not pulled the head. Probably one of them could have destroyed the piston and cylinder wall and the head.

The best bet on an engine that has sat unused and unprepared for twenty years would be to remove the head.....and what you see may scare you

The best bet on an engine that has sat unused and unprepared for twenty years would be to remove the head.....and what you see may scare you