Picked up a 2015 Z/28

[Stefano]

No it was never "fixed". GM has never conceded to the issues. There is a lot of incorrect and conflicting info, even amongst engine shops.

Wegner Motor Sports found, that the coating on the valves as spec'ed by GM from Del West its way too course and wears the valve guides in short order. So we fix the worn guides and send the valves to be stripped and re coated with a non abrasive coating. We have not seen a single valve guide related issue, since, on our custom engines. We spin the LS7s to 7200 rpm. This is really an awesome engineered engine considering the basic design goes back to 1955 for GM.

Here I'm testing a line lock / Barker Button in the parking lot prior to delivery of a 700hp Stage III NicKey Z28.


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