Farmall Cub Stuck Engine

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David Hummel

Member
A week or so ago I pulled my dad's old Farmall cub out of the barn where it has been sitting for around 15-20 years. It is a 1949 model. The engine is currently locked up, any suggestions on getting it unlocked? I am currently thinking that I am in need of a engine rebuild. I have worked on farm equipment my whole life but have never really torn this deep into an engine before. I am thinking that I want to take the engine off the tractor and put it on a stand to rebuild it. On one of the pictures, I post you will see that 2 out of 4 cylinders have let pb blaster past the rings. I am really just looking for tips or suggestions on what I should do, I am going to put the head back on and pressure wash it this weekend before I really tear into it. How hard is it to pull the engine? What's the best way to break it free? Should I buy a hand crank for it?Screenshot 2024-09-30 193335.pngScreenshot 2024-09-30 193309.pngIMG_4920.jpg
 
thats a ugly engine, those frozen rusty valves can be keeping it from turning, probably would need valve seats I bet with all that rust and rot, probably need cylinders bored
maybe drop the pan, pull rod caps and see if the piston can be driven up, the frozen pistons try a chunk of wood and hammer to try and shock the rings loose
 
Consider a replacement engine. For what you are looking at a rebuild cost you could probably spend less money on a replacement ready to install. JMHO Stan
 
tst said:
thats a ugly engine, those frozen rusty valves can be keeping it from turning, probably would need valve seats I bet with all that rust and rot, probably need cylinders bored
maybe drop the pan, pull rod caps and see if the piston can be driven up, the frozen pistons try a chunk of wood and hammer to try and shock the rings loose
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I can do that with the pistons, what's a good way to free up the valves and how will I be able to tell if I need valve seats or not, That is machine shop work if im correct right?
 
staninlowerAL said:
Consider a replacement engine. For what you are looking at a rebuild cost you could probably spend less money on a replacement ready to install. JMHO Stan
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Agree with Stan. Guess, $1500- to $2000- to rebuild that engine. Or $500-, ball part dollar figure, for a parts tractor with a free engine.
 
once the valves are out see how pitted the seats are from the rust, they have to be machined out and new ones pressed in, pay attention to pitting on the deck of the block also, all that rust may have eaten its way in and may need to be decked, , those valves will not be used over, once the keepers are loose they can be pryed out, you can buy a valve lit with new guides, valves, springs and keepers
 
It will be far easier to knock the pistons loose with the tractor still attached to the engine, than hanging off a cheap harbor freight engine stand. At least, to get them moving.
 
You are going to have a serious problem with the rust/rot on the deck. I would consider trying to find a serviceable engine block because that one will cost you $$$$ in machine work and most likely will leak combustion around the valve area.


Sorry for the bad assessment but as Tim said……that is an UGLY engine.

NJ Farmer
 
I don't know it this will help you any and this post is several years old. If you choose to rebuild the engine yourself, which I'm sure you have the mechanical skills to do, I would suspect the rebuild to run you in the $1200-$1600 range. That's a lot of money but you'll have an engine that will be like new and will give you years of service. What else can you buy in that price range that will do the work a Cub will? Shop around for pricing at machine shops. I found the pricing varied a lot...

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Thread 'Cost of Engine Rebuild'

There are a lot of times visitors to this site wonder how much it costs to rebuild a Farmall Cub C60 engine. I'm currently in the process of rebuilding the engine of a late 40's Cub so I thought I'd list the costs of my rebuild. Keep in mind, I'm doing all of the mechanical work myself and only farming out the machining of the block. Every rebuild is slightly different so you mileage may vary.

I purchased this Cub for a forum member who didn't adequately protect his investment with a 50/50 antifreeze/water solution. It appears that the engine was recently rebuilt prior to the block...
 
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ricky racer said:
I don't know it this will help you any and this post is several years old. If you choose to rebuild the engine yourself, which I'm sure you have the mechanical skills to do, I would suspect the rebuild to run you in the $1200-$1600 range. That's a lot of money but you'll have an engine that will be like new and will give you years of service. What else can you buy in that price range that will do the work a Cub will? Shop around for pricing at machine shops. I found the pricing varied a lot...

R

Thread 'Cost of Engine Rebuild'

There are a lot of times visitors to this site wonder how much it costs to rebuild a Farmall Cub C60 engine. I'm currently in the process of rebuilding the engine of a late 40's Cub so I thought I'd list the costs of my rebuild. Keep in mind, I'm doing all of the mechanical work myself and only farming out the machining of the block. Every rebuild is slightly different so you mileage may vary.

I purchased this Cub for a forum member who didn't adequately protect his investment with a 50/50 antifreeze/water solution. It appears that the engine was recently rebuilt prior to the block...
Click to expand...
Yea once I start tearing the engine down and seeing what I need done I will call some machine shops in my area, I think your price range is pretty accurate from what I have been looking at.
 
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