Valve Clearance, Setting/Adjusting: Preparations

Fig 1: Identifying Drift (Plastic, Aluminum Or Brass), Valve And Tappet Surface

Courtesy of VOLVO CARS OF NORTH AMERICA.

Carefully tap the end of the valve stem to ensure that the valve is correctly located in the seat. Use a plastic, aluminum or brass drift to protect the valve and the surface of the valve lifter.

The sound made by tapping reveals if the valve is correctly seated.