pushrods

Camshaft-to-rocker connectors

Pushrods are metal rods in certain internal combustion engines that transfer motion from the camshaft to the valves.

In pushrod engines (also called overhead valve engines), the camshaft sits low in the engine block, and pushrods relay its movement upward to open and close the valves.

This older design contrasts with overhead cam engines, where the camshaft sits atop the cylinder head.

The mechanic found a bent pushrod.

valvetrain

camshaft

Lobed rod operating valves

retainers · flathead · V8 · inline-six

mechanics

actuation

Initiating mechanical movement

lever-action · timing · harmonic · deflection · load-bearing

manufacturing

steel

Carbon-hardened iron alloy

tolerance · length · diameter · machining · grinding · OEM · aftermarket

Categories
Opposites
valve actuation mechanism

pushrodsoverhead cam

Camshaft positioned above valves

DOHC · timing chains · timing belts

Family

pushrod

Familiarity
Top 500,000
Profile
Used worldwide · Timeless · Concrete · Rated G