Using the compressed air/water method, you will actually be able to see bubbles forming past a bent valve on the intake or exhaust side—the larger the leak, the bigger the bubbles. If your ...

Back in the day, a car's intake and exhaust valves opened a specific amount at a specific point in the four stroke cycle, and for a specific amount of time. It was that simple. Nowadays ...

and exhaust. Combustion pushes the pistons down from the top of the cylinder. As engines need air to burn fuel, during intake, valves open up and allow ambient air to come in. When the piston reaches ...

At the very end of the exhaust stroke, when the exhaust valve is still closing, the intake valve will start opening. The opening intake valve brings in a torrent of fresh air that helps expel the ...

The Crane solid-roller bumpstick in our Chevy 406 (see "Mean Mouse: Chevy 406" for the engine build) called for 0.020 inch of clearance (on a hot engine) on both the intake and exhaust valves.

There is also no need for a minimum of two valves (intake and exhaust) per cylinder as seen in a piston engine. Instead, fuel enters via intake ports that don't need to open and close. In a Wankel ...

As a vehicle's engine operates, the intake and exhaust valves open and close rapidly while the pistons move up and down in the cylinder. These mechanical actions require a constant supply of hot oil ...

The cylinder heads themselves feature a completely new design from the old model, with the intake and exhaust valves being reversed from the LS3 engine, with revised valve geometry and revised ...

Specifically, that allowed Porsche to alters the intake valves' timing relative to the position of the pistons in the cylinder as well as the timing of the exhaust valves. It's fuzzy, but above is ...

Depending upon who you might ask, a definition of so-called "reversion" may be compiled in multiple ways. Bottom line, its effects are not necessarily beneficial to efficient combustion ...

Intake valves open and close to let the air-fuel mixture (or just air in some modern engines) enter the cylinders, and the exhaust valves allow exhaust gases to escape. Too much or too little ...