chunk in cylinder wall missing

[stonetalontsi]

well got a little deeper into my engine this weekend. took the head off, and the cylinder walls were a lot rougher than i hoped they would be. In one of the cylinders there is a pea sized chunk missing right at the bottom of the bore. So it looks as if the motor will be coming out is there any way to save the block. Is it a good idea to sleeve the cylinders. Any input is appreciated
Thanks,
Lee

 

[SBR Joe]

well got a little deeper into my engine this weekend. took the head off, and the cylinder walls were a lot rougher than i hoped they would be. In one of the cylinders there is a pea sized chunk missing right at the bottom of the bore. So it looks as if the motor will be coming out is there any way to save the block. Is it a good idea to sleeve the cylinders. Any input is appreciated
Thanks,
Lee

Unless you can clean it up with .020 or .040 overbore, its not likely. You can run .060 over if you want, not many people feel comfortable with it though.

Youd be better off getting a new block rather than sleeving, youll have over half the money invested doing it that way.

 

[constant_proj21]

Buy a new block, hone it out, and put the guts from your engine into the new block. No point in saving a trashed block, when you can get one relatively cheap.

 

[stonetalontsi]

well i just called my motor machinist and he said that he would leave it a lone. ??? I'm a little leery about doing that. I don't know what to do?

 

[constant_proj21]

Should take a picture of what the damage is, I (and others on this site), will be able to help you out much easier that way.

 

[stonetalontsi]

Ok i will see a bout pricing some blocks

 

[SBR Joe]

well i just called my motor machinist and he said that he would leave it a lone. ??? I'm a little leery about doing that. I don't know what to do?

I too vote for a pic.

ANY mark in a cylinder that is deep enough to catch your fingernail on needs to not be there, if its as big as it sounds like going off your description, it shouldnt be something youd want to keep.

 

[BLINKY619]

pictures would help...!!!

 

[stonetalontsi]

I can try and take a pic but its down at the bottom of the stroke. i don't know if it will help.
I don't agree with my machnist but just thought i would share with you guys what he said to me.

 

[BogusSVO]

if it is at the very bottom of the cylinder, closest to the crank, it should be ok, if it is dressed and polished to get rid of any burrs that may be there

most of the time when I see the type of damange your discribing, a rod came apart and hit the bottom of the cylinder

 

[99gst_racer]

I agree with Bogus.^^^ If it's at the very bottom of the cylinder, it probably won't be an issue. I bent my rods a few years back, and one of them was hooked so badly that the side of it was making contact with the lower portion of the cylinder wall and it was actually chunking away at it. A .020" overbore didn't even come close to cleaning that part up, but it didn't matter because my piston skirt doesn't ever travel low enough in the bore to make contact with the lowest part of the cylinder. I'm still running that same block to this day and haven't had any issues.

But, post up a picture and we'll be able to make a little better determination.

 

[stonetalontsi]

sorry guys still no pics didn't have time to get the pics last night. Just to clear this up the gouge is at the bottom of the stroke, but high enough that the rings will pass over the gouge. I'm going to try to get the pics on tonight. It seems that there was a head gasket problem, and water got into a couple of the cylinders. I believe it sat like that for some time and began to rust. Then was fixed and fired up again, and that's how the gouge was made.