blown piston rings

[mettler]

I am trying to determine what cause all three of my driver's side piston rings to break? I just had head gaskets installed and I have heard that when the mill down the head to get rid of any warp it lets the piston move that little fraction more and that some times leads to the rings breaking...anyone else hear of this or have any comments on what might have caused my situation?

thank you

This sounds unusual, will be very interesting to hear what folks have to say. Are you sure the ring weren' broken before the head gasket job? Did you see the cyl walls while it was apart first time? do the cyl walls show slight or big scoring now? Did you get a compression test before the gasket job? after? before this diassasemly? Is it actually apart now?

So we are talking V6 I take it? Why did you replace the head gasket? Did anything else get done to the motor? My guess is... you replaced the head gaskets becasue of a blown one and the damage done to the rings was a result of you limping the thing home..since it still ran...right? Other than that... you would have heard some serious spark-knocking to break ALL of them. Those Toyota's dont work very long as steam engines... I know...I've tried

Toyn
86/Supercharged/Lockrightsx2/5.29's/33"Boggers/35"BFG's/20R LC Engineering head

[mettler]

It is a Chevy 4.3. My mechanic races dragsters and told me that this situation was quite unusual. I think one of the rings has been gone a while, but the other two are recent jobs. In all honesty, I am beginning to think that the guy who had the truck before me didn't take of it at all and everything sort of went at once. I am just trying to make sure it doesn't happen again. the engine is apart right now. I saw the pistons and rings(what is left of them)

Are those pistons OK? If they are and the rings are just broke.... could be an oil problem on that side!!!! If the rings and ring lands are broke...Id say a compression/spark-knock problem. Oh..check to make sure those cylinder walls arent "cone" shaped.

Toyn
86/Supercharged/Lockrightsx2/5.29's/33"Boggers/35"BFG's/20R LC Engineering head

[mettler]

I was told that the inside of the engine looks good, but it is off getting redone anyway. One piston was bad, the one that had the missing ring. I am leaning towards the compression being the culprit since this happened after the head gaskets were replaced..