Table of Contents
What do rocker arms attach to?
A rocker arm is a centrally pivoted lever in the valve train of an engine that converts the motion of the rods to open the valves. Rocker arms transmit motion from the cam lobes to the valves. One end of each rocker arm carries an adjusting screw with a cap or cup which is in contact with the push rod.
What are Rollerrockers?
A roller rocker is a rocker arm that uses bearings instead of metal sliding on metal. It has a wheel on its end like that of a measuring wheel, which rolls by the use of needle bearings. For pushrod engines, roller rockers employ a roller where the rocker contacts the valve stem.
Are tappets and valves the same thing?
In an internal combustion engine, a tappet (also called a ‘valve lifter’ or ‘cam follower’) is the component which converts the rotation of the camshaft into vertical motion which opens and closes the intake or exhaust valve.
What is another name for valve cover?
Rocker covers
Rocker covers are covers that are bolted on over rocker arms in an internal combustion engine. They are called valve covers in the United States, Canada, and in situations where Rocker Arms are not present, such as some Overhead Cam, and most Dual Overhead Cam engines.
What are the different types of rocker arms?
The following types of rocker arms are used in engines [606]: stamped steel rocker arm, roller tipped rocker arm, full roller rocker arm, shaft rocker arm, center pivot rocker arm, and end pivot or finger follower.
What does the rocker shaft do?
The rocker arm is the part responsible for transmitting the movement of the camshaft towards the intake and exhaust valves of the engine, a process that occurs through the direct contact of these parts with the tappets and according to the movement of the shaft.
What are slip on rocker panels?
Slip-on rocker panels are an alternative to full welded panels. Slip-on rockers literally go overtop of the existing rocker panel. They are designed to follow the same contours of the original, but are slightly oversized so that they fit overtop.
What is cam lobe?
Cams located on the camshaft that open and close the intake and exhaust valves in time with the motion of the piston. Cam lobes control the valve lift, and there is a direct relationship between the shape of the cam lobes and the way the engine performs in different speed ranges.
What is a lifter?
A lifter is a cylinder that sits between a car’s camshaft and the cylinder valves. For example, lifters on pushrod engines activate a rocker arm instead of directly pressing on the valve. That said, lifters fall into two types: hydraulic or mechanical.
Where are rocker arms located?
Rocker arms are typically located between the pushrod and intake and exhaust valves. They are pushed and pulled by pushrods to “rock” up and down, opening and closing the exhaust valve and intake valve of the combustion chamber on engines with a camshaft below the engine.