stuck piston wrist pin

[bigb001]

the other day i let a friend of mine ride my quad, and long story short he blew it up, the piston seized in the cylinder i have the top end completly apart but i cant get the wrist pin out of the piston i think when it siezed it bent, any tips to get it out?

 

[sicivicdude]

Use a piston wrist pin puller.

Or make your own. A deep well 1/2" drive socket, a piece of all thread and a piece of tubing over the all thread the correct size of the wrist pin will pull the pin out and into the deep well socket.

 

[darederek]

use a socket that fits just inside the piston. put an extension on. and pound the F**K out of it with a hammer

 

[sicivicdude]

whoa whoa whoa!

Now you're trying to get the guy to screw up a rod, thrust bearing, case bearing, case mating surfaces, or all of them!

You have to remove a stuck wrist pin without banging on the rest of the engine. Use that same socket which fits the wrist pin, a piece of all thread and a deep well socket to extract the pin inside the deep well socket.

 

[darederek]

oops sry didnt even think about the crank. crank was hosed on the motor we did that to. a case half is cracked too. its pretty much a parts motor

 

[sicivicdude]

Oh, well if the motor is totally hosed it's a different case all together but there's a possibility his engine is still not that bad off... yet.

 

[Larry's Shee]

Never force it, get a bigger hammer . As stated use a pin puller. Does the piston still pivot on the rod? Any ? on rigging a puller?

 

[bigb001]

thanks for the advice guys i got it, it was still pivoting on the crank it just took some wd40 a hammer a deep ten mm socket and some patince the crank dosent look bent so im fine.