Chevy and GMC Duramax Diesel Forum - View Single Post - LB7 Rebuild-Nitride Crank?
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post #1 of (permalink) Old 06-20-2019, 10:48 AM Thread Starter
palamesa
 
Join Date: Jun 2019
Location: Fallbrook, Ca
Posts: 3
LB7 Rebuild-Nitride Crank?

I'm doing a rebuild on my 2002 DMAX. My local machine shop (who I've been using forever for gas engines) did the machining and short block assembly for me. This was their first DMAX. The motor had 250K miles and cylinder wall damage from a blown head gasket. We went .10 on the crank mains and rods and .30 over on the cylinders. I came across some older threads about the need to re-harden the crank after machining. I've seen some say it's required and others say it's not. I'm also interested in opinions about the cylinder walls too. Do they need anything done after going .30 over.
I'm hoping now that these engines are being rebuilt in large numbers I could get updated information. It currently is on my engine stand with all new ARP bolts and I really don't want to take it back apart.
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