Well, it's been a while since the last update..whoa! Let's recap a little..
We managed to almost lose the crank sprocket last summer, so a new (to me) crank and pinned sprocket were installed.
The car ran fantastic for about 3 days till it locked up on the highway..boo. So, out came the motor again.
I was pretty surprised to see this:
I'm concerned about the cause. All of the bearings look great. It appears maybe to be an overheating issue, but the car was running cool. I'm thinking it might be good to send out the injectors for a lookover? The piston above was from cylinder 4. Cylinder 2 had some scuffs near the middle of the skirt, and the other two appeared to look great.
In my research I have read 1Z pistons are considered to be not very strong, so I picked up some replacements..
That's about all for now.