Engine Lock up

[wolf1945]

I am having a problem with a 172CI ford tractor engine. I can turn the crank about 150 degrees then it will lockup, I can spin it the other way and it will lockup at about 150 degrees. I thing that it has a stuck valve. Anyone have any thoughts on this problem. Not seeing any water in oil but the previous PO could of change the oil before i bought it. PO told me that it has set outside in woods for about 6 yrs. Said it had a rear seal leaking and thats why he parked it. Thanks for any help.

 

[RoadsideGeo]

Have you pulled the valve cover and checked to see if all the valves move while turning it over?

 

[wolf1945]

(quoted from post at 22:44:45 07/18/20) Have you pulled the valve cover and checked to see if all the valves move while turning it over?

I will check that tomorrow got dark today. I think my next move is to remove valve train.

 

[nashranch]

I had that problem years ago on a 2N i bought. Mine turned out to be a broken valve just laying on top of the piston

 

[Sean in PA]

Gas or diesel?

If gas, have you pulled all of the spark plugs when you try to turn it?

If diesel, same thing with the injectors?

 

[wolf1945]

(quoted from post at 01:08:41 07/19/20) Gas or diesel?

If gas, have you pulled all of the spark plugs when you try to turn it?

If diesel, same thing with the injectors?

as. I have the plugs out. Same problem, I will remove the head this morning. That should show me the problem.

 

[Ultradog MN]

My buddy bought a 172 industrial diesel a
few years ago. Seller said it was a good
running engine. Got ready to install it
and it would turn over fine then stop.
Not a hard metal to metal stop. A soft
stop.
Valves were all going up and down as they
should. We pulled the head and found the
cylinder had a bunch of corn in it.
Cleaned out the cylinder and emptied out
the intake manifold which had a couple
cups of corn in it and replaced the head
gasket. Darned mice!
Seller was truthful - it was a real good
running engine.

 

[Kirk-NJ]

Pull the side cover and check for stuck valve

 

[Kirk-NJ]

Top valve cover. Side cover on 8n.

 

[wolf1945]

(quoted from post at 15:39:19 07/19/20) Top valve cover. Side cover on 8n.

Problem solved. #4 piston had some Rust build up not any sign of water. I just made a mixture of diesel and oil soaked down the pistons for about 1 Hr. Turned the crank with a little force and it broke free. Now I need to decide what to do next. My problem it the tin I need everything except the piece that has the gauges in it. I live in Panama City FL but will travel to pick up some. Any help on the tin would be appreciated. My tractor a 1992 ford 841 172 cu inch motor.

 

[nashranch]

This guy here in Oregon has a assortment of tin work off a 971 rowcrop... they may be the same as you need.

https://eugene.craigslist.org/grd/d/crawfordsville-ford-tractor-parts/7152360281.html

 

[Sean in PA]

My tractor a 1992 ford 841 172 cu inch motor.

I assume that you mean that it's a 1962 841.

 

[showcrop]

(quoted from post at 13:22:38 07/19/20) This guy here in Oregon has a assortment of tin work off a 971 rowcrop... they may be the same as you need.

https://eugene.craigslist.org/grd/d/crawfordsville-ford-tractor-parts/7152360281.html

901 and 801 tin are different.

 

[Lynn Patrick]

Not mine but IL is closer than OR!
https://www.facebook.com/marketplace/item/640519523231210/

 

[wolf1945]

(quoted from post at 08:10:29 07/20/20)

My tractor a 1992 ford 841 172 cu inch motor.

I assume that you mean that it's a 1962 841.

es Typo. 1962 841 Power Master