Posted by BarnyardEngineering on September 24, 2021 at 05:35:03 from (161.69.121.33):
In Reply to: New Chevy question posted by rrman61 on September 20, 2021 at 10:02:58:
Quoting Removed, click Modern View to see
They reinvented the lifter to allow the engine to switch between 4 cylinder and 8 cylinder operation to increase the fuel economy a couple tenths of an MPG.
My 2015 with 103,000 on it had a lifter seize less than a week after the 5-year warranty ran out. Bent a valve. Fortunately, the head checked out, the cam checked out, so all they had to do was replace the lifter and the valve, and put it back together.
The dealer advised me not to open the can of worms with GM, as GM would have insisted that the head be replaced, the cam be replaced, all new lifters, to the tune of about $12,000. At best GM would cover half because it was just out of warranty as a "goodwill gesture," leaving me out $6000. The dealer fixed it "old school" having a machine shop check out the head and cam, replacing only the bad components, for $2500.
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