NHC-250 Stuck pistons

[5_TON_TOMATOE]

O K- Well, now I've got some issues. Pulled the top end off after trying to lever open some valves, and some were stuck. 3 cylinders have rust and corrosion in them. No coolant that I can tell. Contaminated fuel, or just humidity in the air and sitting? Any thoughts, or has anyone had this issue before? Figure I better do liners, pistons, and rings at least, but pistons are stuck real good to liners. How should I go about removing these guys? Thanks

 

[Elijah95]

I wouldn’t even waste the time rebuilding a wheezing 250, not worth it IMO. Source a complete running 300, 400 or even a Shiny 290 and set it in. You’ll actually have piston coolers then, a turbo, more power and it’ll add value to the truck especially if you find an engine with Jakes


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[Crf450x]

O K- Well, now I've got some issues. Pulled the top end off after trying to lever open some valves, and some were stuck. 3 cylinders have rust and corrosion in them. No coolant that I can tell. Contaminated fuel, or just humidity in the air and sitting? Any thoughts, or has anyone had this issue before? Figure I better do liners, pistons, and rings at least, but pistons are stuck real good to liners. How should I go about removing these guys? Thanks

Can you not just knock the liners out while the pistons are stuck in them?

 

[5_TON_TOMATOE]

Can you not just knock the liners out while the pistons are stuck in them?

Well, want to leave in frame- Has anyone pulled their liners with the pistons in them, and how?

 

[simp5782]

Just hammer with a good long round bar from the bottom up and out.

I have an actual liner puller.

Just drop acetone/atf in the cylinders for a few days and let it work. Piston will knock out

 

[M35A2-AZ]

I have some liners and piston kits for sale. PM if your interested.

 

[5_TON_TOMATOE]

I have some liners and piston kits for sale. PM if your interested.

Yes, I'm interested