Tappet

Tappet is a part of the valve gear. There are different tappets: hydraulic or dished, for instance. The tappet is connected to the push rod. The tappet is moved by a cam. Thus, the push rod is pushed forward and the valve rocker starts to run. In the air-cooled engines push rods are situated in a protective tube. But in the water cooled engines they are located in special cylinder block houses.

There are numerous variations of the described principle, but many modern engines do not need push rods any more. Engines are started directly. Push rods are mostly used in motorcycles. It is rather difficult to replace the push rod, tappet or protective pipe. Shade-tree mechanics can replace these car parts only if they have good experience and knowledge. 

An improper installation of the push rod/ tappet/ protective pipe can cause major damage. It is also necessary to take into consideration the quality of the car part. It is better not to install used spare parts. If you want to buy cheap push rod/ tappet/ protective pipe of a high quality, our online store is the right shop. We have a wide assortment of various car parts like headlamps, hydraulic filter, joint disk/ Hardy disk, V-belts, a/c hose, air filter. Use the search function and you will quickly find the part you need.

How to identify a faulty hydraulic valve lifter

Diagnostics of the component requires a stethoscope. Diagnostics is performed on running engine. Resonator of the device should be brought into proximity with each hydraulic valve lifter, one by one. Strong knocking sound from the component indicates its failure. The second method is pressing the components with a finger, one by one, with the engine stopped. Serviceable hydraulic valve lifters cannot be pressed in. To obtain more precise data, seek the help of specialists at a service station.