028 AV Super Wood Boss cylinder and piston - try to save cylinder?

[Kevin Frampton]

Hello all, new here. I have a 028 AV Super Wood Boss. Pictures of the cylinder and piston below. I realize that it is difficult to determine cylinder viability based on just pictures alone. It appears that on the exhaust side of cylinder is scored up past the port. Not sure if aluminum transfer / galling or cut into nikasil.
My question, based on the pictures, what is the general consensus and what do I need to look for in the cylinder? Does anyone have a rule of thumb on the depth of the marks and if they can be honed out? Also, anyone have experience with the flex-hone with these cylinders? I have used one in the past, but do not have the correct size yet for this one yet. Thanks for your help! Kevin

 

[grizz55chev]

Do not hone that cylinder, nikasil doesn’t do well with a hone. Look up the Mastermind method of aluminum transfer removal, works like a charm. That jug looks to be saveable, and you will also need to do a pressure-vacuum test to find out what cooked that piston.

 

[HarleyT]

Yeah, buff that out with some light emory cloth=good as new!!!!

 

[Kevin Frampton]

Thanks guys, I will try that out. I will certainly do a pressure - vacuum test. I'm told by the previous owner the son in law used starter fluid and that is what did it.

 

[grizz55chev]

Thanks guys, I will try that out. I will certainly do a pressure - vacuum test. I'm told by the previous owner the son in law used starter fluid and that is what did it.

Not likely, but it’s a clue! The p+ v test will tell.

 

[HarleyT]

Blaming in-laws is standard procedure!!!

 

[grizz55chev]

Blaming in-laws is standard procedure!!!

Bad karma if they’re dead.

 

[qurotro]

I would say polish it with sand paper and put new piston in it. I've saved one that's worse than this.