Northstar Engines and System Technical Discussion Discussion, Update on parts I have/had in Cadillac Engine Discussion; New rod bolts? Thought you were supposed to change rod bearings when you took off rods due to bearing crush ...
Northstar rod bolts are comparatively high torque items - always replace them at overhaul.
From the GM service manual for Northstar procedures: "Powdered metal connecting rods have rod bolts which yield when torqued. If the rod bolts are loosened or removed the rod bolts must be replaced. Rod bolts that are not replaced will not torque to the correct clamp load and can lead to serious engine damage."
I have broken a few main bolts. I used to keep a few new bolts in my area at the Caddy dealer for the other techs to use because we did not stock them. Spent almost 6 years as what I would say is a Northstar Tech. Still work on Caddy's just not every day -- Chevy/Caddy dealer fits me better
Thanks Cal Editor aka A.J.
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GM World Class Technician since 2009