In the cylinder heads.
There are two types of valves in an engine. The valves are located in the head. There are exhaust valves and fuel intake valves
A 4-cycle engine that has the intake and exhaust valves located in the cylinder head.
The intake valves are in the intake ports, the exhaust valves are in the exhaust ports.
In a 1998 Chevy Malibu with a 3.1-liter engine, the intake valves are generally larger than the exhaust valves. The intake valves are located on the side of the engine that faces the air intake system, while the exhaust valves are positioned on the side connected to the exhaust manifold. Additionally, the intake valves typically have a longer stem compared to the exhaust valves, which can help in distinguishing between them. Always refer to the vehicle's service manual for precise specifications and diagrams.
the intake are next to the carb and the exhaust are next to the exhaust manafold intake are .008 exhaust are .012 with the engine warm good luck
On the Mazda 6 RF7J diesel engine, the intake valves are typically located on the side of the engine where the air enters, while the exhaust valves are positioned on the side where the exhaust gases exit. The intake valves allow air to enter the combustion chamber, whereas the exhaust valves enable the expulsion of combustion gases after the fuel has been burned. It's important to consult the specific engine manual for precise valve identification and configurations.
The exhaust valves are smaller and lead to the exhaust manifold.
On a fully assembled engine, the intake and exhaust valves will not be visible. If the cylinder head is removed from the engine, the valves will then be visible. The intake valve faces are usually larger than those of the exhaust valves, and can be easily distinguished visually.
The intake valves line up with the intake runners on the intake manifold. The exhaust valves line up with the exhaust runners on the exhaust manifold or headers. With #1 at tdc you can set 1,2,5,7 intake and 1,3,4,8 exhaust valves. Rotate the engine one revolution to #6 tdc and set the remaining valves.
Mounted in the heads.
The intake valves can hit the exhaust valves.
As an air/fuel mixture is drawn into the intake ports, intake valves open to allow the mixture to enter the cylinder. On the exhaust stroke of an engine, the exhaust valves open, allowing the burned air/fuel mixture to exit out the exhaust ports. Intake valves are larger than exhaust valves, and are able to be found on the "cold" or intake side of the cylinder head(s).