Must be a rare motor if the valve cover says ZTEK on it.
Especially if it needs machine work after it jumped time. The normal motors are non-interference.
04 ZX3 RIP [Best Non-SVT FITF12][3/13 ROTM][7/14 ROTM][2014 ROTY][Best Engineered FF14]
01 SE The V8 Estate [Organizers Choice FF15]
02 SE The SVTedan
12 SE Hatch Sport & Winter Package, ST Front End