Ok I'll admit never broke a piston, But have chucked a few rods.

Got a 3k engine on unknown origin.

Piston tops look brand new.

However two skirts have massive cracks, I'm guessing Heat seized but not sure ?

same problem with my 4k, lucky the pistons worn out and not made a huge mark in the bore

 

I'm guessin there repco pistons?

same problem with my 4k, lucky the pistons worn out and not made a huge mark in the bore

 

I'm guessin there repco pistons?

 

The bores sizes up almost brand new all less than 75.05 as does the crank, around 41.996 and 44.994 If my memory serves correct.

The pistons have the toyota symbol inside, very minor vertical score in both bores, Hone should fix.

Cheers

Andy

One of my pistons had a fair crack in it to, no marks to the bores and the engine ran fine, maybe it's age.

i wanna see a set of these rods spin 8000rpm on a daily basis ;)

I like a bit of crack with my skirt ;)

 

What are the recesses above the ring lands?

I like a bit of crack with my skirt :dance:

 

What are the recesses above the ring lands?

 

There just the marks that point to the front of the block.

Andy

There just the marks that point to the front of the block.

Andy

 

ok, never seen them on any pistons I have been in touch with.