Classic VW Beetles are beloved for their simple, air-cooled flat-four engines, but getting them to run their best takes proper tuning and smart upgrades. From setting valves and timing before touching ...

Every engine has a means of coordinating the timing between the valve train and the rest of the engine. Some engines use a timing chain and some a timing belt. A timing belt has the relatively ...

An engine's health depends on several key measures and functions. For example, air and fuel need to be present in the correct quantities, coolant is required to keep the engine operating at a safe ...