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Rebuild Time

Could have been this way for a long time, maybe it would last a long time more? Hopefully the inserts won't be to pricey.
 
Shoot, that's more surface area to work with and should push a stronger flame front- I say run it like it is, and run it HARD!

Didn't really get to see that till now on a full screen- holy moly!
 
I've seen alot of pistons in my day but I've NEVER seen one crack in 2 like that... Congrats Leo!
 
I wonder about the valve it hit, it's rocker arm, pushrod, and lifter. Even the cam is worth checking. That is a lot of force to due that. Bad valve spring maybe floated? The fact that you never heard anything go bam makes it more weird.
 
Will L. said:
I wonder about the valve it hit, it's rocker arm, pushrod, and lifter. Even the cam is worth checking. That is a lot of force to due that. Bad valve spring maybe floated? The fact that you never heard anything go bam makes it more weird.
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There are no marks on the valves, push rods are fine. There was no indication anything was wrong until I stopped and it came to an idle, then the miss could be heard and felt.
 
NVW said:
Here's some pics of the piston out, I guess I'll be looking into Lock n Stitch or a new block. One wonders how long the cracks have been there.
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What is that big circular mark on that piston??.

Leo I have a brand new block sitting here,looks like i never gonna use it..i sell it to you cheap!.
I have heads too..new in the box
 
bison said:
What is that big circular mark on that piston??.

Leo I have a brand new block sitting here,looks like i never gonna use it..i sell it to you cheap!.
I have heads too..new in the box
Click to expand...
Simon, all the pistons have that circular mark, for this build I have the Full Torque inserts coming and I'll use the heads from the 98 as they only had 10-20k kms on them. Going to send you a PM.
 
This is the cleaned up version of the piston. The earlier indent in the pic was mostly an optical illusion. There is a slight casting defect. They all cleaned up quite nice.

I had higher egt's for awhile and suspect that is what did this piston in, a bad injector. ECT was not an issue.
 

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Seems like everyone that post a picture of their pistons looks like a valve has hit it. Several lately, I think I asked Bowtiebutler the same thing in his post and turned out it was just an illusion. Weird :confused:
 
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