79 Lund with a 228 Mercruiser engine (305). Got it pulled and pretty much all tore down and would like some feedback on what I can fix and what just plain needs replaced. I'll include pics.
Had water in 2 cylinders, but I may have caused that. Had the carb and distributor pulled and it was outside a week ago when an unexpected rainstorm passed thru. The engine hasn't been started for a few years so I would assume that the pitting would be worse if it was longer than that. Plus, it had been winterized before it was parked a few years ago. Had antifreeze come out when I removed the manifolds and there was not any antifreeze in the water on the pistons.
Cylinder 2 was at TDC and has what actually looked like a layer of caked mud along the bottom egde of the top of the piston. This caused some pitting where this was sitting...though no rust. I've included a pic of the pitting. Its above where the rings of the piston hit. There is also a small patch of pitting below the piston.
Cylinder 7 had about an inch of water on top of the piston which caused some light surface rust in the cylinder. I oiled that up, removed the piston and cannot feel any pitting. Another reason that I think last weeks rain caused the water. There is some pitting or scoring at the bottom of the cylinder below where the piston hits. Pic of this cylinder included.
Interesting enough, no water was in the oil that I could see. Apparently nothing was passing past these pistons.
All the rest of the cylinders look great. If is wasn't for the 2 problem cylinders, I might get away with a honing. May still but I'm looking for expert opinions.
The camshaft has some small surface rust where it meets the distributor. pic included.
Pistons all look smooth. No scoring though I will have to replace at least one that was quite stuck. Broke the wood trying to push it out so I just grabbed my breaker bar, stuffed a rag in the cylinder and then beat the crap out of it. 15 minutes later it finally came out. Interestingly enough, there wasn't a mark in that cylinder, but I did take a small chip from the bottom of the piston. That was cylinder 1.
Included pic of the heads, but its obvious that these will need all new valves and a complete rebuild.
Rod bearings were worn, but the wear was even across the board. Haven't pulled the crank yet. No sign of water damage below cylinders.
And lastly, I stripped the first 1/2" of the threads out of the crank trying to get it to turn. Can that be repaired or does it have to be replaced?
I'm planning on taking the block and heads into a shop and have them cleaned and checked out and conditioned. But I'm always leary of that without having an idea myself of what I actually need to do....LOL. What they say and what I actually need may be 2 different things.
Had water in 2 cylinders, but I may have caused that. Had the carb and distributor pulled and it was outside a week ago when an unexpected rainstorm passed thru. The engine hasn't been started for a few years so I would assume that the pitting would be worse if it was longer than that. Plus, it had been winterized before it was parked a few years ago. Had antifreeze come out when I removed the manifolds and there was not any antifreeze in the water on the pistons.
Cylinder 2 was at TDC and has what actually looked like a layer of caked mud along the bottom egde of the top of the piston. This caused some pitting where this was sitting...though no rust. I've included a pic of the pitting. Its above where the rings of the piston hit. There is also a small patch of pitting below the piston.
Cylinder 7 had about an inch of water on top of the piston which caused some light surface rust in the cylinder. I oiled that up, removed the piston and cannot feel any pitting. Another reason that I think last weeks rain caused the water. There is some pitting or scoring at the bottom of the cylinder below where the piston hits. Pic of this cylinder included.
Interesting enough, no water was in the oil that I could see. Apparently nothing was passing past these pistons.
All the rest of the cylinders look great. If is wasn't for the 2 problem cylinders, I might get away with a honing. May still but I'm looking for expert opinions.
The camshaft has some small surface rust where it meets the distributor. pic included.
Pistons all look smooth. No scoring though I will have to replace at least one that was quite stuck. Broke the wood trying to push it out so I just grabbed my breaker bar, stuffed a rag in the cylinder and then beat the crap out of it. 15 minutes later it finally came out. Interestingly enough, there wasn't a mark in that cylinder, but I did take a small chip from the bottom of the piston. That was cylinder 1.
Included pic of the heads, but its obvious that these will need all new valves and a complete rebuild.
Rod bearings were worn, but the wear was even across the board. Haven't pulled the crank yet. No sign of water damage below cylinders.
And lastly, I stripped the first 1/2" of the threads out of the crank trying to get it to turn. Can that be repaired or does it have to be replaced?
I'm planning on taking the block and heads into a shop and have them cleaned and checked out and conditioned. But I'm always leary of that without having an idea myself of what I actually need to do....LOL. What they say and what I actually need may be 2 different things.
