Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

One of the scariest things for a vintage car owner who loves driving their car is the thought of parts no longer being ...

At Circle Track, we're all about helping you do more for yourself. But sometimes that's just not realistic. That's not casting doubts on the intelligence of our readership. Just like your mom, we ...

Your engine is composed of many moving parts and pieces. In order to move through the four stages of internal combustion, all of these bits and bobs are quite necessary. Some engines, however, take ...

Does your engine need a valve adjustment? It depends on the age, condition and brand of vehicle you’re driving. Due to the popularization of roller-follower valve train designs that reduce friction ...

Give them the results of a TDC valve-drop static clearance test, and Comp Cam's techs can calculate the piston-to-valve clearance for any of its cams at any degree of rotation. This is especially ...

The theory behind one man (or woman) being the caretaker of a single engine as it rolls down the assembly line is not new. Other performance-machine makers, such as Ducati, have experimented with it ...

Ever wondered what happens when you mix metalworking with old car parts? In this video, I take engine valves from a worn-out ...