Valve cotter function: the spring pushes the upper spring seat, and the inner seat of the upper spring seat and the outer seat of the valve cotter are closely matched, so that the bead height (rib) of the valve cotter (pair) is stuck in the valve groove.

Valve cotters have the task to connect the valve-spring retainer with the valve so that the valve spring always keeps the valve in its required position. While rotated cotters were used previously, today the cold imprinted valve cotters are state of the art …

Valve cotters are employed as retaining and locking components. They connect the valve-spring retainer to the valve by friction locking, and thus keep the valvespring preloaded.

These light-weight (9 lbs.) high strength aluminum alloy cylinder heads run cooler, allow higher compression ratios, and have a greater than 35% increase in flow rate over stock heads. Heads come with silicon-bronze valve guides and hardened valve seats.

A pair of valve cotter are used to lock Valve stem with spring retainer and ensures smooth functioning of engine. Renex Valves offer Valve cotter made as precision stamped and are available with single and multi bead as per design and application.

Replace the worn out and damaged original valve locks with these premium 5/16" valve cotters. Precision engineered. Sold as a pair for 1 valve. 8 pairs required for four-cylinder engines and 12 pairs required six-cylinder engines. Application specific. Made in USA.

Oct 5, 2017 · Feature: 1. Remove and install valve spring easily with one tool. 2. Knurled handle to ensure a secure grip. 3. Remove valve spring: take out the spring and parts inside the tool, then push valve spring to remove it. 4. Install valve spring: put the spring and parts back to this tool, then push valve spring and cotter back to the position ...

Valve cotter for 9 series engines. Two required per valve.

“Valve Cotters” are made using cold forging technology or CNC lathe seamless technology to control tolerance, heat treatment and surface finish. Precision ID bore to control and secure valve stem’s contact.

The Longest in the Business All Classic British products are warrantied to be free from defects in material and workmanship for 2 years from the date of invoice. All superchargers, supercharger components, and supercharger hardware are warranted to be free from defects in material and workmanship for 1 year from date of invoice. Moss Motors, Ltd. …