Another stuck Flathead story....

[OoltewahSpeedShop]

Is 3 5/16" a safe bore without worrying about heating problems.

[Barry WNY]

I would give up on the valve train, some are impossable to get out correctly. Best bet is cut the stuck ones with a wheel, once the spring is gone may be able to move it. Have also torched out the retainer so they can be pried up guide & all. Pulling down on the guide with the correct KRW tool just breaks off the guide notch.
I needed to save a new crank & rods in a super bad 59A, beating on the rods not an option. Punched a hole in the piston top and sawzalled the piston wall 2 places, once a section of piston was chipped outta there took little persuasion. But the chances of busting a good block too risky.
Get the cam out and it may turn.

[OoltewahSpeedShop]

The acetone/trans fluid/mineral spirits concoction seems to be working. All but one of the pistons are free. The last one will come around and its not even one of the worst ones in the pictures. The valve guides are what is holding the program up.

The intake valves are free.... How do I get to the exhaust valves? Turn the engine till the exhaust ports are up, then pour them full?

[Mike..Yorba Linda]

Originally Posted by Django

What about vinegar?

This works great....

[Fe26]

Originally Posted by 52merc

everything isbigger in texas !!!!!!!!!!!!!!!!!!!!! lol

Does that include the size of the heads under them Ten Gallon hats?

[john hamilton]

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Used to restore old one-cylinder farm engines -- often stuck. You are doing the right things but you are trying to bust everything loose at once. Take out the crank and periodically smack each piston with a piece of wood and big hammer. Some will come loose sooner than others.

Douse the valves, guides and lifters with PB Blaster and tap each one with a soft hammer.

Once something starts to move squirt it and tap it in and out. If it moves it's on the way out.

The last engine I restored (check video below) had deep grooves in the cylinder and a lot of rust. I hit it with a hone and put it back together. "Clearance" meant something else in those days. The engine is 6 hp and weighs 1,860 pounds! Good luck.

https://www.youtube.com/watch?v=fLB5BxO8GvA

[Blownflatheaddeuce]

Originally Posted by OoltewahSpeedShop

The acetone/trans fluid/mineral spirits concoction seems to be working. All but one of the pistons are free. ?

Glad to hear it man....wont be long now !!

BFD

[mike in las vegas]

Here is a block that was given to me. Soaked in molassas for weeks and weeks and still had to beat the snot out of it.