Valve Lifter Overview

A valve lifter, also known as a tappet or cam follower, is an essential component in an internal combustion engine’s valve train. It plays a vital role in ensuring valves open and close at the appropriate times during the engine cycle.

Importance of Valve Lifters

Valve lifters are driven by the camshaft's lobes and actuate the engine's intake and exhaust valves. They ensure precise valve timings, contributing to the engine's smooth operation and efficient fuel combustion.

Functionality

These lifters maintain the zero valve clearance, absorbing the thermal expansion and maintaining constant contact with the cam and valve. This eliminates valve lash and contributes to quieter and more efficient engine performance.

Consequences of a Broken Valve Lifter

If a valve lifter is broken or fails, it can lead to a compromised valve train, resulting in engine misfire, decreased power, increased emissions, and potentially severe engine damage .

Compatibility List

• Q60/G Coupe
• Q40/G Sedan
• Q50
• M35/45
• Q70/M Hybrid
• Qx50/Ex
• Qx70/Fx
• Q70/M
• Qx80/Qx56
• Fx35/45
• Q60/G Convertible
• G37 Sedan
• M