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 ...

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 ...

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 ...

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 ...

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.

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 ...

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 ...

One area where this is seen often is in extra intake and exhaust valves. Why does it matter if you have double the valve count, and how does it work? Engineering Explained is here with answers ...

We realized at the last minute that the combination of an LS7 cylinder head and the double-throwdown valvetrain we wanted was going to require a set of custom valves. There simply were no shelf ...

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 ...