: Northstar Ring Cleaning Procedure and proper oil level TSB



Ranger
04-22-10, 05:29 PM
Oil consumption rates and ring cleaning procedure.

Submariner409
03-12-12, 05:42 PM
In the linked TSB, the first paragraph on P.3 also specifically states the proper GM recommended oil level fill procedure and dipstick indication.

Why does the Northstar take 7.5 quarts of oil ??? Because a LOT of oil is circulated to the DOHC valvetrain for cooling - oil is the only medium that cools the engine rotating machinery ..............

Also check out the revised head bolt degrees of turn change in the torque sequence. P.6