They are the 4 large holes on the outside of the head where the headers or exhaust manifolds go.
The exhaust lifters will line up with the exhaust manifolds,Remove the valve cover if your working on a V8 and the valve that lines up with the exhaust port will be the exhaust valve,If it is a Chevy V8 they will be from standing in front of the car exhaust,intake,intake,exhaust,exhaust,intake,intake,exhaust.
It depends on what engine you have but the 02 is in the exhaust pipe or exhaust manifold and the EGR is a round disc shaped thing on the rear of the engine.
Intake valve and exhaust valve.
The PCV valve on a 2002 Chevy Suburban 6.0 liter engine is located in the engine. You cannot miss the valve.
With the possible exception of some very early small block heads that had offset valve cover bolts, yes, it will all fit the 283 engine.
Indicate inlet and exhaust valve clearances of Toyota 5k engine
the valve bent because the piston hit it, due to a weak valve spring or over revving the engine
.16 of an inch both for intake valve and exhaust valve [cold]
Three. Inlet valve, fuel injection valve, exhaust valve.
Exhaust Gas Recirculation (ERG) recirculates a portion of an engine's exhaust as back to the engine cylinders. On a Renault scenic, the valve is located at the top center of the engine.
The intake valve is typically located in front of the exhaust valve in a combustion engine. In a typical inline engine configuration, the intake valve is positioned to allow air and fuel mixture into the combustion chamber, while the exhaust valve is situated to release exhaust gases after combustion. The specific arrangement can vary depending on the engine design, but this front-to-back layout is common.
On a 1997 Chevy S10 with a 2.2L engine, the EGR (Exhaust Gas Recirculation) valve is typically located on the intake manifold, near the throttle body. It is mounted on the engine's cylinder head and connected to the exhaust system via a tube. You may need to remove some components or covers for easier access to the EGR valve.