Pushrod Engine (OHV)
A pushrod or overhead-valve engine has its camshaft in the block and operates the valves through pushrods and rocker arms.
What is Pushrod Engine (OHV)?
The layout is compact in height. Many American V8s still use it. It usually has two valves per cylinder. Fewer moving parts in the head keep the engine compact and light for its displacement.
How it works
The camshaft pushes lifters and rods, which tilt rockers that open the valves in the head.
Why it matters for your car
Very high revs are limited by the valvetrain mass. Lifter noise can point to oil or wear problems.
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