how do I tell if these are stock pistons? I measured 4.032 just below the rings. I know they are supposed to have a taper but wheer are you supposed to measure from? Top or bottom. I also enclosed pics. Dont know what stock ones are supposed to look like either.

[IMG]local://upfiles/64293/2ECFDD81CF1445118732FCFD75CAF4D5.jpg[/IMG]

[IMG]local://upfiles/64293/09F3000523F4485F8765A5DDD0E9A263.jpg[/IMG]

 

They sound like 30 overs. They look like my 30-over flat-tops. Clean-off the tops and see if you can find an .030 stamp anywhere.

 

I couldn't get a pic of the emblem on the top. too much glare. I drew it out. There is an 8 and 612 written on the top. I also added another pic of the skirt that I didn't post earlier.

[IMG]local://upfiles/64293/8F821C9D7AB9431EA961E090618A6BEB.jpg[/IMG]

 

Here are the pistons that are in out of my 289 2V motor. I believe them to be the stock pistons. The diameter measured just below the oil ring is 3.9765.

I am still looking for two (2) replacement pistons to replace the two that I have with cracked skirts. If anyone has some pistons that match these please let me know.


[IMG]local://upfiles/71416/3ADDD6B7BB824FDEAB8503315EADB03C.jpg[/IMG]

[IMG]local://upfiles/71416/245901EBBEDA488C9007A6AA1E3F07DF.jpg[/IMG]

 

hey i may have two pistons for you, let me check tomorrow they are still on the rods.

to answer the original question, yes 4.032 would be .030 over flat tops.

 

That would be great.

Please let me know.