cast or chrome bore?

[TBWdracula2003]

how do if i have a chrome bore or a cast bore?

i have a txl 340, and im wanting to rebuild it because it is reallllllly low on compression, and i cant tell if i have cast of chrome bore...

the serial number on the cylinders is " EC34PL - 02 " piston number ( both left and right ) " 09706 " thanks guys


i looked on a site and i think it is a chrome bore..... if i put a new piston and rings in here will it seal up and give me good compression or do i have to get a new sleve? if i have to get a new sleve ill just go on ebay and find a 400 indy motor

 

[winter brew]

Most everything back then was a cast sleeve, shouldn't matter if you're just putting in new pistons and rings....or did you plan a overbore?

 

[Super Dave3]

Take a magnet and see if it will stick to the bore. If your magnet holds strong to the bore its cast, if the magnet just barely sticks its nicasil.

 

[TBWdracula2003]

Most everything back then was a cast sleeve, shouldn't matter if you're just putting in new pistons and rings....or did you plan a overbore?

its a 340 so im not planning an over bore, but if it was out of round i would have to bore it any way to get the rings to seal

Take a magnet and see if it will stick to the bore. If your magnet holds strong to the bore its cast, if the magnet just barely sticks its nicasil.

ill go try that, thanks

 

[TBWdracula2003]

ok... it stuck like superglue, but even if it was nickasil, wouldent it be on a cast sleve and stick like that any way?

 

[gcmci]

Nikasil is coated over alumium not coated cast, look at the ports and see if there is a thick sleeve or thin.

 

[TBWdracula2003]

Nikasil is coated over alumium not coated cast, look at the ports and see if there is a thick sleeve or thin.

it was a thicker sleve and the magnet stuck to it like krazy glue

 

[moyiesledhead]

Definately cast. Polaris didn't use chrome on the TXL340.

 

[TBWdracula2003]

ok that seals the deal, and instead of going out and buying some inside mic's and dial indicators i know a guy who has mic's so i can figure out if there overbore or not