While there are many different types of sprockets

A Timing Sprocket is a fundamental component of the timing chain in automotive engines. The two auto parts oversee guaranteeing adequate timing between the crankshaft and the camshaft, thereby allowing the engine to generate sufficient combustion to make it run smoothly. If a sprocket experiences wear, the chain can skip and cause severe damage to the engine, so it's important to replace it with a premium-quality automotive part.

In most engine designs, a cam and crank sprocket (or sprockets) are connected to a toothed belt or a chain that controls the timing of the intake and exhaust valves. When the system is working properly, these sprockets ensure the power peak is at the appropriate point in the RPM range, balancing performance, emissions and fuel economy goals.

However, over time and with frequent use, these components can wear out or stretch. This can result in internal component failure, such as a worn chain tensioner or guide. If a tensioner or guide fails, the chain can also fail completely, and the engine will stop running altogether. Cloyes offers a wide selection of complete timing sets, including premium-quality sprockets that are made from hardened steel for maximum durability.

While there are many different types of sprockets, we offer anodized steel replacements that prevent sludge buildup, protect against sticking and extend chain life. These sprockets are manufactured using high-quality materials and precise machining, ensuring they match OE specifications in terms of dimensions, fit and finish. They also feature a soft core that helps to resist brittleness, and the teeth are hardened at the predicted wear points to increase their durability.

The sprockets are designed with a flange that fits over the keyway on the engine block or head to reduce sludge and contamination buildup and protect the gear teeth. The sprockets are also precision machined to ensure proper positioning and accurate fit over the cam and crank. The sprockets are supplied with a hex key and cotter pin to simplify installation. The hex key is used to align the cam and crank sprockets, as well as to secure the chain. The cotter pin keeps the chain from slipping and wearing out the sprockets, which would otherwise shorten its lifespan.

Aside from abrasion, other factors can cause sprockets to wear out prematurely. One common problem is caused by molded nylon gear teeth, which can break loose from the sprocket and create a grinding noise that's very difficult to diagnose. The sprocket itself can also crack, which can interfere with the oil pump's pickup screen and starve the engine of oil. This problem is often caused by excessive heat, so it's important to use a sprocket with a hardened steel gear.

We recommend upgrading to a roller sprocket if you're rebuilding your engine for increased performance, as these have contoured links that roll across the cam and crankshaft sprocket teeth to reduce friction and wear. They're also thermal shock, salt spray and vibration-tested to ensure the parts meet the highest standards of quality.