Looking for information on the Piston-to-Bore clearance of the 5.9L
Cummins. This is information that should be in the shop manual (if I
had access to one). Need to know the clearance spec. and if there is
more than one piston grade. Thx.
If available I'd also like to know the bore and piston diameter
You could calculate the piston-to-bore clearance if the service manual
has the bore size with tolerance (instead of the Max Dia.). Using the
numbers above give an answer that I know isn't correct (.252mm max
As comparison, the current 6.4L ITEC Powerstroke runs 0.0441-0.0909mm
The nominal bore/stroke dimensions for the 5.9L are 102mm X 120mm (4.01574"
Subtracting the piston diameter(s) from the nominal bore size gives a piston
clearance tolerance of .104mm-.136mm
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