Marks in cylinder wall [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Marks in cylinder wall


neversatisfiedmoto
05-12-2008, 01:22 AM
I have seen it a couple times on other motors and was once told what made the mark but cant remember, anybody seen this before?

http://thumb8.webshots.net/t/58/758/8/7/94/2939807940103211588zkibGX_th.jpg

Leadfoot
05-12-2008, 06:52 AM
Induction Hardening of the upper cylinder wall.

neversatisfiedmoto
05-12-2008, 10:14 AM
common??? it is very wierd how it is perfectly cemetrical and you can not feel the marks its like a stain on the cylinder wall

NLDP
05-12-2008, 05:34 PM
Completely normal.

bobo
05-12-2008, 06:39 PM
That is how the upper part of the cylinder is hardened on a Dmax. It looks like leopard spotting. Ask your machine shop about it. If they can't explain it, take your stuff somewhere else.

duramaxsandwich
05-12-2008, 09:05 PM
mine is the same way.