Suzuki Engine 2002 GRAND VITARA SQ420 Service Manual page 418

Idler Sprocket No.1
Check teeth of sprocket (2) for wear or damage.
1. Bearing
Idler Sprocket No.2
Check teeth of sprocket (2) for wear or damage.
1. Bush
1st Timing Chain
Check timing chain (1) for wear or damage.
Timing Chain Tensioner Adjuster No.1
Check that latch (1) and tooth surface (2) are free from damage
and latch functions properly.
ENGINE MECHANICAL (H25 ENGINE) 6A2-43