Is this piston ruined? Could I raise it up and smooth it out again with a punch or grinder? The offending valve has been replaced, but I did not put the head on yet.

 

i would tape off the entire top section of the top end leave your self some sanding room and use various sanding paper to smooth it back out DO NOT USE A PUNCH OR A GRINDER lol you can crack it or make it worse, just sand it back out smooth and use a shop vac at the same to suck up stuff as you work

 

if it crushed the ring land the piston ring will stick and it will loose compression. Very common problem after valve bending.

 

well it was not running when it happened. I did this turning the crank by hand. I've sanded it down pretty well and it looks almost good as new. I'll post pics once its cleaned up.

 

Couldn't you just leave it as-is?

 

you did that damage by turning it by hand? Are you Superman or did ya force it lol

 

That stuff is REALLY soft... and I'm a self-tought dumbass.

 

LOl nice man i guess you learned your lesson if it dont turn dont force it with a impact gun lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fireant &raquo;</TD></TR><TR><TD CLASS="quote">I did this turning the crank by hand.</TD></TR></TABLE>
OMG........ How the hell did you manage to do that by hand?????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sleepingciv &raquo;</TD></TR><TR><TD CLASS="quote">i would tape off the entire top section of the top end leave your self some sanding room and use various sanding paper to smooth it back out DO NOT USE A PUNCH OR A GRINDER lol you can crack it or make it worse, just sand it back out smooth and use a shop vac at the same to suck up stuff as you work</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sleepingciv &raquo;</TD></TR><TR><TD CLASS="quote">LOl nice man i guess you learned your lesson if it dont turn dont force it with a impact gun lol </TD></TR></TABLE>

Seems all fine now... Another lesson: dont work too late and in a rush to finish, that's when dumb mistakes happen.

 

Sanded down...

 

looks good man good luck the rest of the way

 

thats why i don't do late night projects