How do you adjust tappet clearnce of maruti alto 2006 model?

To adjust the tappet clearance on a 2006 Maruti Alto, first, ensure the engine is cold. Remove the valve cover and rotate the engine to align the timing mark with the TDC (Top Dead Center) of cylinder one. Use a feeler gauge to measure the clearance between the tappet and the rocker arm; it should be set to the manufacturer's specifications (typically around 0.15 mm for intake and 0.20 mm for exhaust). Adjust the clearance by loosening the lock nut and turning the adjuster screw, then recheck with the feeler gauge before reassembling the valve cover.