What Did You Do To Your Car Today?

[arronm]

Use a small USB  snake camera down the bores to check each piston, bore and head. Detention kills the pistons at the edge, and breaks away sections adjacent to the top ring.

[Puffwagon]

I was logging when it broke and it wasn't knocking. The log looks really good actually.

 

The motor is getting rebuilt so no need for a camera.

 

I'll post a pic or two when I get it apart.

[arronm]

The damage may have already occurred prior.  Detonation is the silent killa.....

[Puffwagon]

I don't think it broke from detonation for various reasons.

 

I know my turbo pistons have seen a lot more abuse and are still serviceable.

[arronm]

Once you pull the head off  you will see.  

[Puffwagon]

Yep. I would have got it off today except I have all the kids home and only had a couple of hours to work on the car while the baby slept.

[Rab]

Kids in the car seats while you work on the car

[Puffwagon]

Haha while that sounds good in theory, in practice it is never fun having 4 kids in a car, no matter what you're doing.

[Puffwagon]

I got it all apart and it looked like I thought it would. No signs of detonation and one cracked piston. 

 

The pics tell the tale mostly but if it's hard to see then I can tell yas that it's cracked the ring lands, bent the rings and cracked through the piston about a quarter of the way around where the second ring goes.

 

One thing that has me wondering is the broken piston is completely clean for some reason where the other 5 aren't. Could the oil have cleaned it off on the short drive home? It was burning a fair friggin bit from that cylinder. I did clean the piston crowns when I assembled it and it only ran for a few weeks so the carbon build up is very slight.

 

More to the story, after a few weeks I replaced the plugs as it felt a bit sluggish on boost. It picked up a lot of power when I swapped the plugs and immediately after I swapped them, I went for a drive and it broke.

 

 

 

 

 

[k31th]

ouch...