How does this happen?

[Irishchris]

Just pulled my engine apart and in the right cylinder the is 2 really deep groves in on the wall. I was wondering what could cause this and is it fixable. I posted the best pic i could get with my cell.

[camatv]

did the wrist pin come out??

[Irishchris]

did the wrist pin come out??

 

No the piston looked like it was on there right, the engine was running fine I was tearing it down to get it ported and put a stroker kit in it.

[Larry's Shee]

Have you ever had this engine apart before? What does the end of the pin look like on that side? was there a cir clip there?

[malcman]

Wow, deja vu much. I pulled my motor apart last weekend and have the exact same marks on my cylinder. I was missing a wrist pin cir clip on that side though which would explain my marks.

[Irishchris]

Wow, deja vu much. I pulled my motor apart last weekend and have the exact same marks on my cylinder. I was missing a wrist pin cir clip on that side though which would explain my marks.

 

Yeah it sucks the motor was .20 over but I have only had it a few months, looks like time for some new cylinders.

[ECshee]

the distance between the 2 marks is almost the same size as OD of the wrist pin.. it looks like? better hit the F/S section quick, theres a couple sets of cyls for sale!

[malcman]

Yeah it sucks the motor was .20 over but I have only had it a few months, looks like time for some new cylinders.

 

I hear ya, mine blew up the first time I had it out lol.

[Jereme6655]

that has to be what happened.....a cir clip popped out or was never reinstalled and the wrist-pin wiggled a little way out.....enough to cause its to dig in hard to the cylinder walls.