Quote:
Originally Posted by SOCAL.M6.ZLE
The valve guide wear was terrible for only 8350 miles, although my tuner said he had seen much worse...
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It seems like that is such a craps shoot. Mine were really tight at 20-something thousand miles. I was going to add that service to my head porting, but when I disassembled them, they were very snug with no hour glass shape. I was a little surprised they weren't odd-shaped, honestly. The bearing wear really blows, though.
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2017 ZL1 M6 Black | Maggie 2650 // 103TB // Big Gulp // CSP LT's & Ultra Cats // BMR MM // BC Forged KL13
Mods being installed-
oil pump, cam, ported heads, dual in-tank, Goliath and XDI, corn, etc., etc.