Cam Wear
WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Using a micrometer, measure cam height. If measured height is below its limit, replace camshaft.
"a": Cam height
Standard (Intake): 39.445 - 39.605 mm (1.5530 - 1.5592 in.)
Standard (Exhaust): 39.428 - 39.588 mm (1.5523 - 1.5585 in.)
Limit: 39.400 mm (1.5512 in.)