Here,we will discuss about the importance of Tappet Clearance of the Inlet and Exhaust valve in four- stroke Diesel engine. What is Tappet Clearance ? Tappet clearance is a space between the top of the stem of the valve and the rocker arm when the valves are closed position & the engine is at the … Continue reading What is Tappet Clearance ? Procedure to Measure & Adjust