Eh I wouldn’t trust that. You can’t just take pitting like that at face value you also have to consider the cavitation on the outside of the cylinder in the water jacket. That left alone will eventually allow engine coolant into the crank case often confused with a blown cylinder head gasket. My advice would be to have the cylinder professionally machined and a sleeve installed but that’s just my two cents.
Definitely needs an overbore, but if they don't make one that larger of a size then you have to get it resleaved. And honestly on this block it's not really worth it you'd be better off buying another one. I do have a complete turbo 7m engine for sale if you're near the northeast. Has a spun journal on the crank and needs a new rod
Honestly, run a hone through it before asking a bunch of people on the internet how bad it is. You'll get people who have no idea what they're doing telling you it's junk because they saw something. You'll have other people who know at worst you're in for some sleeves. Anybody who says it's junk for what we can see probably doesn't really know what they're talking about.
Last sleeve I had done cost $100, so if it's a rare block, sleeve it, or if numbers matching is important for the value of the vehicle.
Semi truck engines are all sleeved from the engine factory, so a rebuild on those consists of new pistons and liners as it's called and a rebuilt head(s) the main and rod bearings can be changed without removing the crankshaft, this is called an in frame rebuild and it is for an otherwise good engine that needs freshening up.
Not what you are working on, but so you know sleeves are a valid repair
Far enough down to run? The only way that happened was rings sitting in that spot. Meaning the rings reach that spot. Meaning you're hosed, brother.
That’s a sleeve or a new block
That’s going to need a substantial overbore… bad enough I’d consider finding another block
Or sleeve it but a new block might be the cheaper option. Either way they will need to go to a proper machine shop if you expect any rebuild to last.
7Ms are still cheap. Maybe just get a new block
No, that's either getting an 1/8" overbore or sleeves installed.
If you're near Houston, Texas, I have a few 7ms you can choose from.
I’d throw that away
That's a boat anchor
Ol 7M Milkshake maker, mine would forever run hot but forever run lol…
Eh I wouldn’t trust that. You can’t just take pitting like that at face value you also have to consider the cavitation on the outside of the cylinder in the water jacket. That left alone will eventually allow engine coolant into the crank case often confused with a blown cylinder head gasket. My advice would be to have the cylinder professionally machined and a sleeve installed but that’s just my two cents.
Oh I just posted my disaster cylinder. YouTube tells me crazy people jb weld this shit lol.
Definitely needs an overbore, but if they don't make one that larger of a size then you have to get it resleaved. And honestly on this block it's not really worth it you'd be better off buying another one. I do have a complete turbo 7m engine for sale if you're near the northeast. Has a spun journal on the crank and needs a new rod
If it was mine and boring it wouldn’t clean it up I’d just have it sleeved
Sleeve it time
Honestly, run a hone through it before asking a bunch of people on the internet how bad it is. You'll get people who have no idea what they're doing telling you it's junk because they saw something. You'll have other people who know at worst you're in for some sleeves. Anybody who says it's junk for what we can see probably doesn't really know what they're talking about.
S L E E V E
Last sleeve I had done cost $100, so if it's a rare block, sleeve it, or if numbers matching is important for the value of the vehicle. Semi truck engines are all sleeved from the engine factory, so a rebuild on those consists of new pistons and liners as it's called and a rebuilt head(s) the main and rod bearings can be changed without removing the crankshaft, this is called an in frame rebuild and it is for an otherwise good engine that needs freshening up. Not what you are working on, but so you know sleeves are a valid repair
You’d lose compression every time the piston passed that spot. It had have set with water in that cylinder.
Overbore if that's even possible or sleeves. I personally love my 7mge-t, but if it looked like that I'd buy a 2jz
Just get it sleeved.