Piston Part #'s

dzlfarmboy

dzlfarmboy

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Lookin for a 0.20 over Cummins Marine Piston Part #
I know the Standard Pistons Part # is 3800756

Any info would be appreciated.

Thanks Brett
 
Not sure if these are right:

Piston Kit Desc Piston Only
3800756 6BTA-Marine Std A 3935591
3800757 6BTA-Marine Std B 3935592
3800758 6BTA-Marine Std C 3935593
3800760 6BTA-Marine 1.00mm 3935595
3800761 6BTA-Marine 0.50mm 3935594
 
Well i see if any of these match to what im looking for. Anybody else use a .020 over cummins Marine piston in their rebuild yet?
 
Wait! Dont use a .020" over 370 marine slug for high power. It is weaker than the standard bore 370 part. Considerably.

Two choices:

1) The best choice is to purchase a new block with a standard bore. It will be bored/honed small, but you can hone it out a few thou for added clearance. Use the standard bore Cummins 370 marine piston.

2) The next best choice is to keep the block you have at .020 over and use a Cummins .020 over 215 piston from 96-97.

Use .007" total piston to wall clearance.

You get what you pay for. Choice number 1 is best for high power.
 
Soup Nazi said:
Wait! Dont use a .020" over 370 marine slug for high power. It is weaker than the standard bore 370 part. Considerably.

Two choices:

1) The best choice is to purchase a new block with a standard bore. It will be bored/honed small, but you can hone it out a few thou for added clearance. Use the standard bore Cummins 370 marine piston.

2) The next best choice is to keep the block you have at .020 over and use a Cummins .020 over 215 piston from 96-97.

Use .007" total piston to wall clearance.

You get what you pay for. Choice number 1 is best for high power.
Click to expand...

Ok Well I cant justify a new block beings the motor I bought for the project already had a junk crank in it. That sucks cause I really wanted the bigger bowl the 370's offered. So whats the difference in the pistons in a 215 motor compared to a 180. And a stock 215 would be better than a Mahle 155. I also would like to get them shaved to drop the compression some. Any difference in piston choice with that being said?

Thanks Brett
 
hey thats not cool at all cuz i was looking at the same thing now im bummed what shall we unfortunate owners of a .020 over motor buy now or do we buy 215 pistons and mod the bowl and shave off top what we need???????
 
bonesmx2000 said:
hey thats not cool at all cuz i was looking at the same thing now im bummed what shall we unfortunate owners of a .020 over motor buy now or do we buy 215 pistons and mod the bowl and shave off top what we need???????
Click to expand...

What Mahle pistons did you have and what happend with your motor?
 
i have a set of stk bowl mahles i think with .013 protrusion that are .020 over 2 of them #1 and #6 got into a fight with broken trubo parts after one of my many turbos blew apart, and you guessed it they lost
so tomm i am picking up an 03 common rail and the 97 12v will be strictly a pullling truck with the occasional friday night to raise some he** in town
 
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