Talk about exquisite choreography; it happens under the hood of your vehicle every time you take a drive.  Your engine’s many complex parts must work exactly together.  One key is a pa...

As your engine runs, the intake valves need to open to allow air into the engine.  They remain closed while the air and fuel are compressed and ignited, powering the piston.  Then the exhaus...

As your engine runs, the intake valves need to open up to allow air into the engine. They remain closed while the air and fuel is compressed and ignited, powering the piston. Then the exhaust valves o...