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1997 12 Valve Cummins Head

4K views 5 replies 3 participants last post by  GAmes 
#1 ·
#2 ·
I am immediately suspicious when they show the same part number for '88 to '98. 1st gen heads, from what I've read, have different injector holes. Where are you located?
 
#4 ·
the non intercooled 1st gen heads had 9mm injector tips, intercooled and 2nd gen heads were all 7mm. the 9mm heads were prone to cracking from the injector tip bore to the valves under severe use, thus they switched to a 7mm tip to aleviate that issue
 
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