Cummins piston wrist pin height

mfsuper90

mfsuper90

300ft is all I need
Joined
Feb 6, 2013
Messages
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I've searched a lot and came up with nothing. Can some one help me out with wrist pin height (crown to pin centerline) on a 6.7 QSB piston and the less common 4.1" bore 6.7 that was used in Ag equipment?

Thanks in advance
 
Smoke has piston prints posted on here. I think it was something like 69-71mm IIRC.
 
[ame="http://s358.photobucket.com/user/westonmerril/library/Piston%20Info?sort=6&page=1"]Piston Info by Weston Shupe | Photobucket[/ame]
 
Much appreciated! I couldn't find that info for the life of me, very helpful.

Thanks again,
Eric
 
69.4mm for both, Photobucket has become even more useless, I didn't think that was possible.
 
Thanks smokem, I appreciate the help.

Is the 4.1" bore an actual cummins engine or is it the iveco/caseIH/ new holland counterpart?
 
It was produced by Cummins and used in a few different applications, I had a good bit of info on the piston some time ago, but I do not recall where it is now. Referencing the pin location, the same value represents both 4.21" versions, I believe the smaller bore had a different compression height.
 
Last edited:
Smokem said:
I believe the smaller bore had a different compression height.
Click to expand...

Along with a 38mm pin. I can picture the post where you put the info, I know it's on here somewhere. I've had those pistons in my hands on several occasions, I probably wrote it down somewhere where I was sure I'd remember it......
 
The pin is 38mm vs 40mm that is standard, bowl is 52mm wide and 25mm deep.

Compression distance;

12v/24v 5.9L ~ 71mm
24v 6.7L ~ 69mm
12v 6.7L ~ 63mm
Click to expand...
...
 
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