Stuck piston

[Ranger]

I'm working on a F134 that's has severe pitting in #4 cylinder, I'm trying to get the piston out through the bottom and the piston just wont budge. I have soaked it in penetrating oil and hit it on top with a hammer and block of wood.

Any advice on how to get it to move?

[wesk]

Fill the bore with diesel fuel and let it sit for a week. Then get the BFH and the 4x4.
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

[major519]

I agree with Wes on this one. Having taken dozens of old flathead motors apart over the years, I have had to get ugly on them soemtimes.
Diesel works; sometimes. I have even lit up the block before using a half and half gas diesel mix. Sometimes the heat will allow the piston to break free and at least allow the rest to wick down.
A BFH and a hardwood block is the key...

[Jim]

Set a block of dry ice on the piston top. Try the BFH
and wood after it evaporates.

PS: Loved Kelly's Heroes!

Jim in Darkest Arkansas

[Ranger]

Didn't have any diesel so I put lighter fluid in it, tomorrow I'll light it and let it burn. Then I will hit it with the BFH and see what happens.

[Balvar24]

The piston is probably shot. You could get the die grinder out?

[wesk]

The key to success with old car restoration is PATIENCE, determination, humility, and attention to detail.

The Patience is a virtue when dealing with penetrating fluids. 20 years of corrosion does not yield to 30 minutes of penetrant and hammering.

Shattering a piston to free it up with brute force should always be a last resort. The chance for collateral damage is too high. I've seen guys ricoshet off the piston and drive a hole right thru the cylinder wall. I've seen many a rod bent that way as well. There are a hundred other restoration things you can do this week while that piston soaks for a week in diesel. The gallon of diesel will only cost $5.

We were all 17 once and rambunctious and impatient. Here's your chance to take advantage of all of us old farts who can tell you the stories of how we screwed it all up and save you the expense of screwing it up on your own!
_________________
Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php

[DaveM38A1]

I have an engine with a stuck piston. I made a plywood disk the size of the cylinder bore and beat with a 2X4 after soaking in diesel fuel and ATF for bout 3 weeks. The others got out, but this one is stuck. finally used a 2 inch socket and extension with the wood under the socket and moved it. Now its in the soak again. We will see, the cylinder bores don't look bad. it just sat out in the weather too long.

I hope I can get it running without too much expensive machining.

I agree, patience is what is needed, to avoid costing more money.

My other engine runs, but pumps oil out the tail pipe. Took off the head and No. 2 piston is missing a chunk and No. 3 exhaust valve is stuck. Probably rings are stuck also. So no matter what it looks like some machining work is in my future.

Dave

[Ranger]

I'm taking the whole engine to a machine shop, the owner, Jack is a friend of mine. He's going to inspect the block and do the mill work for me, hopefully I can work out some sort of deal with him and make it less expensive.

Still haven't got the piston out though.

[RimfireJim]

[Balvar24]

I just hope mine is as easy to put together as it was to take apart!

[RICKG]

[Ranger]

[JAM]

Excuse my ignorance of terminology;
what do you say BFH?

[Jim]

Hi, Jam, well, ah, let's just say, "Big Favorite Hammer" OK?
This is a family forum.