Which type of valve lifters are typically used in modern V8 engines?

In modern V8 engines, hydraulic lifters are commonly used due to their ability to automatically adjust for changes in engine temperature and oil viscosity. These lifters maintain zero lash, which means they prevent the gap between the rocker arm and the lifter from varying, regardless of temperature or wear. This creates a more efficient engine operation, reducing engine noise and wear over time.

Hydraulic lifters operate by using engine oil to control the movement of the lifter, allowing for precise valve timing and a smoother operation. This design offers significant advantages in terms of maintenance and performance, making them a preferred choice in the design of contemporary V8 engines.

While roller lifters, which use a roller on the end to reduce friction, can also be found in modern engines for performance applications, hydraulic lifters remain the standard choice for their reliability and ease of use in everyday driving circumstances. Other types, such as flat tappet lifters and pneumatic lifters, are less commonly used in modern designs, with flat tappet lifters mainly found in older engines, and pneumatic lifters generally reserved for specific racing applications.