Small chip in piston

[dicedealer702]

 

This is a small chip in my left piston. Dose any one know what might cause this?

Should I worry about this?

[SAVAGE420]

What pistons are those and how long have they been in / ran? Looks more like a crack starting and a chip.

If i seen that in any of my motors, i would take them out right then and there and they would become an ash tray on the bench, just a matter of time before the skirt will break apart and reak havoc to the cyl walls /crank ect ect.

 

Most times it's because the piston to cylinder clearance was too great. When the piston is allowed to rattle in the cylinder bore, it develops stress cracks and eventually shatters.

Could have sucked in foreign debris also.

Or even could have caught on the intake port right there if they weren't chamfering properly.

[Larry's Shee]

Yep , tear that beech down . Right now you only need a piston. Let us know what you find.

[zachmw]

What pistons are those and how long have they been in / ran? Looks more like a crack starting and a chip.

If i seen that in any of my motors, i would take them out right then and there and they would become an ash tray on the bench, just a matter of time before the skirt will break apart and reak havoc to the cyl walls /crank ect ect.

 

Most times it's because the piston to cylinder clearance was too great. When the piston is allowed to rattle in the cylinder bore, it develops stress cracks and eventually shatters.

Could have sucked in foreign debris also.

Or even could have caught on the intake port right there if they weren't chamfering properly.

yep

[dicedealer702]

Hey guys thanks for talkin me into taking apart my shee.

When I took off the cool head the o-ring on the left was shot

and let coolent into my head and f@&d it. God damn modquad head.

Going to mill my stock head so it don't happen agian . Anyways this is

some pic of what I found.

 

[banshee#44]

that sucks man. i have had my banshee for a while now i should probably do a maintnence teardown .

[SAVAGE420]

Yup, your very lucky you pulled it apart when you did.

Sorta sucks right now, but it could have been WAY worse if you didn't man.

[volcrano]

Yup, your very lucky you pulled it apart when you did.

Sorta sucks right now, but it could have been WAY worse if you didn't man.

good looking out sav,that had extremely little time before catastrophy.so how did all the chips get in there?did it run without oil since the coolant washed it down,therefore leaning it???

[lilmegill727]

your lucky you did. same thing happened to my cousins shee, but we didnt catch it quick enough. piece of piston skirt broke, went down in the cases, and wrecked the crank, well at least the bearings from what we know so far.