stuck valves

[amsterdam]

what’s the best way to loose stuck valves in a 8n tractor? atf in the spark plug holes,

 

[RedMF40]

I’d pull the head, give them a light tap tap tap and some good penetrant around the seats. Probably some other issues in there you can take a look at. It’s a dead tractor, you can’t kill it any more.

 

[old]

what’s the best way to loose stuck valves in a 8n tractor? atf in the spark plug holes,

I fill the cylinders with ATF and also pour as much as I can down the exhaust. With the hood off you can push/drive the valves down by way of the spark plug holes but be careful not to damage the treads for the plugs

 

[JIM MN]

Are the valves stuck now, and won't move? Or does the tractor run for a while, and they stick when warmed up?

 

[used red MN]

with ATF and also pour as much as I can down the exhaust

Must have forgot what the exhaust looks like on an 8N. As far as I know he still has me on ignore.

 

[MarkB_MI]

Must have forgot what the exhaust looks like on an 8N. As far as I know he still has me on ignore.

He has most of us on ignore. Saves time reading YT when you only see half the posts.

 

[504]

Pull the covers off of the right side and shoot your favorite juice in there. Becarful with a small hammer and a big straight screw driver and work the stems. You can break a retainer. Take your time.

 

[amsterdam]

Are the valves stuck now, and won't move? Or does the tractor run for a while, and they stick when warmed up?

they stick when warming up after about five minutes the all work

 

[JIM MN]

Put some 10 weight oil or what you have, into the gas tank with the gas, half tank of gas; its a upper lub. Then run the tractor for a while to get the oil into the cylinders and on valve stems and guides.

 

[Richard G.]

they stick when warming up after about five minutes the all work

I use Marvel Mystery Oil in the gas and the oil when that happens.
It's cheap and has always worked for me.
Put a quart in the tank and a pint in the oil.

 

[old]

they stick when warming up after about five minutes the all work

Mix a quart of ATF to 3 gal of gas and run it that way. The ATF cleans and lubes the valves as it runs.

 

[amsterdam]

I use Marvel Mystery Oil in the gas and the oil when that happens.
It's cheap and has always worked for me.
Put a quart in the tank and a pint in the oil.

a quart in the gas? wow, does that work? and a pint in the oil? in the gas tank do you jut the quart in at half a tank or what ever!

 

[old]

a quart in the gas? wow, does that work? and a pint in the oil? in the gas tank do you jut the quart in at half a tank or what ever!

ATF does the same thing at half the cost but it doesn't smell as good LOL

 

[Richard G.]

a quart in the gas? wow, does that work? and a pint in the oil? in the gas tank do you jut the quart in at half a tank or what ever!

That will work in a half tank of gas.
Like old said, ATF works great also.

 

[Richard G.]

ATF does the same thing at half the cost but it doesn't smell as good LOL

MM oil smells like Pepto Bismol
to me.
I think they both have bismuth in them.lol

 

[Jim.ME]

ATF does the same thing at half the cost but it doesn't smell as good LOL

I see $8.99 per qt for Marvel Mystery oil and $12.99 to $22.99 per qt for ATF at O'Reilly's. And I agree, MM smells better.

 

[Texasmark]

I use Marvel Mystery Oil in the gas and the oil when that happens.
It's cheap and has always worked for me.
Put a quart in the tank and a pint in the oil.

The stems and seats have to be shined up. I would get it running and when it starts having valve problems, shut it off and let it cool. When cool, repeat the process a couple of dozen times. When you get the can kicked down the road you may be pleasantly surprised. I just finished with a Ford 3600 that I thought was worn out. Didn't expect it to have been run just a few minutes repeatedly , or sitting up and not running since I bought it from a tractor repair business as the root cause of my findings.

But after smoking, and valve problems, ticking lifters and such for about a year and maybe 50 hours on the tractor, all the things that had me worried disappeared......just had to slick things back up. I used MMO years ago but didn't use it for very long.....why? Just didn't set me on fire......maybe I didn't use it long enough to see what it could do.

What I have stayed with has been Sea Foam and as others on here have testified, and the fact that you can go into any auto parts store and find it on the shelf, including WM, it has obviously proven itself....contains light mineral oil for upper cylinder lube, naptha for cleaning up stuck oil including sludge, and a little alcohol to clean up any (obviously limited amounts of) water in the fuel, per the MSDS. Put this header in a www search engine and check out the contents of MMO: What is in mm oil treatment. AI has some good answers on my Google search engine.

With your problem, since the engine will run, I think adding some MMO to the Sea Foam would make for a workable solution. For how much I'd add 8 oz of 50-50 mix to each gallon of gas....8/128 = a 6% solution. Shouldn't have a problem getting the engine to start and run with that percentage. Once you get the engine cleaned up I'd continue to use one or the other but cut the percentage down to 2-3% of your Ethanol or gas. I keep SF in my gas mowers...my tractors are all diesel and I use Power Services Diesel treatments for them.

Note: I used Sea Foam in addition to my regular PS additives until I got the 3600 engine cleaned up. The PS diesel treatment took over for the every day fuel maintenance task being it is a diesel.