Diesel Place banner
1 - 3 of 3 Posts

·
Registered
2001 GMC Sierra 2500HD 4x4 Ext. Cab Long Box - LB7
Joined
·
8 Posts
Discussion Starter · #1 ·
I've got 200k on my LB7 and a leaky head gasket. I just removed the driver's side head and noticed the rear cylinder (#8 I believe) was the culprit. The bottom head bolt at the 6 o'clock position (the one not under the valve cover) removed with ease and was coated with a very very thick coating of rust. I have the ARP head stud kit ready to go once I finish rebuilding the heads, but my concern is the strength of the cast iron block material. The bolt itself seems to be intact and the rust appears to be block material itself. Should I worry about not enough cast iron for the new head studs to bite into and forever being a weak spot for a hot (600hp) engine? Or do I have to consider a new block? Any thoughts would be appreciated, thanks!
Wood Tool Bunsen burner Metal Natural material
Automotive tire Black Bicycle part Helmet Rim
 

·
Administrator
Joined
·
19,884 Posts
Get some compressed air, clean the bore, chase the threads to help clean them up, then clean the bore with air again. Then shoot some fluid film down the bore
(y)
 
  • Like
Reactions: dieselolds

·
Ronald Reagan fan
Joined
·
4,624 Posts
The block should be fine in that regard.Good advice from Okdually👍
 
1 - 3 of 3 Posts
Top