Depends on engine size.
Typically two valves per cylinder. One intake and one exhaust. Some higher performance applications can have four valves per cylinder.
3 valves
16 valves
3 valves
3 or 4 valves
A d16z6 has 16 valves 8 intake and 8 exhaust valves.
16 valves
they have two - four valves
eight valves
16 engine valves.
The 4 cyl. has 16 valves and the v6 has 24 valves.
3 valves per engine cylinder , 24 valves total
3 this answer is incorrect there are 4 valves in the human heart.