12v Pistons .050 over

[dangerous06]

They are part # 2860312 and .050 over. Been on the shelf for 10 years in original box! Brand new anybody interested drop me a line. I don't even remember what I paid for them! Or know what they are worth! So make me an offer!
Thanks Andy

 

[9724VF350]

They are part # 2860312 and .050 over. Been on the shelf for 10 years in original box! Brand new anybody interested drop me a line. I don't even remember what I paid for them! Or know what they are worth! So make me an offer!
Thanks Andy

.050 over or .5mm/.020 over? Should that part number be 286031?

 

[Mark Nixon]

.050 over or .5mm/.020 over? Should that part number be 286031?

.50 is 1/2mm, or .020" (Twenty Thousandths) of an inch.
Cummins has 7 digits in their part number, so 2860312 is the correct length for a Cummins number.

Mark.

 

[Snedge]

.50 is 1/2mm, or .020" (Twenty Thousandths) of an inch.
Cummins has 7 digits in their part number, so 2860312 is the correct length for a Cummins number.

Mark.

That ain't no Cummins number. Maybe Clevite, or Mahle with one too many numbers.
I don't think .050" o/s pistons exist.

 

[Mark Nixon]

I said Cummins has 7 digits, but I didn't say it WAS a Cummins number.
The ".050" I believe is a typo on the OP's part, I think they are ".50" or Twenty Thousandths over size.

Cummins over sized pistons are usually .020 (.50mm) or .040 (1.0mm) over.

Rod bearings can be .25mm (.010"), .50 (.020") .75mm (.030") or 1.0mm (.040") under sized.

I believe Cummins will also sell rod bearings with the rod side in various over sizes, for certain engines with fractured cap rods.
I can't believe anyone would be desperate enough to save a cracker rod, though.

Mark.

 

[9724VF350]

286031 is a .010 reduced compression height variant of the 286030 Mahle, which is one of the 4 bowl designs once available similar to what most would refer to as "intercooled 12v bowls".

 

[Snedge]

286031 is a .010 reduced compression height variant of the 286030 Mahle, which is one of the 4 bowl designs once available similar to what most would refer to as "intercooled 12v bowls".

That is correct.