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Automotive engine timing components such as timing belts and timing chains play a crucial role in synchronizing the movement of the engine's valves and pistons. Timing belts and timing chains are designed for durability and longevity, but both require regular maintenance to ensure they last. Timing chains are made from metal links and lubricated with engine oil. |
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What is the difference between a timing chain and a timing belt?
Timing chains and timing belts serve the crucial function of synchronizing the rotation of the engine's crankshaft and camshaft(s). While their function is the same, the material they are made from, the maintenance required to keep them functional, and their replacement costs can be quite different from each other.
What are timing chains?
Timing chains are made from metal links and form a connection between multiple metal sprockets. These gears, which are located in the engine on the crankshaft and camshaft(s) make sure there is a proper timing of the camshaft or the camshaft towards the crankshaft. Because of this, they are the most durable option for timing and can last the life of the engine with proper maintenance. Some applications have known problems around the distribution. For example, one of our blogs has more information on TSi and BMW distribution chain problems.
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How to install a timing chain?
Replacement of the timing chain involves removing the front cover of the engine to expose the timing gears, chain, tensioner(s), and guide(s). The chain can wear out over time and as the tensioners and guides wear the chain can make more noise with age. One of the biggest signs the timing chain system needs maintenance is the audible change in sound level. When the timing chain system needs maintenance, consider replacing all components in the system as a complete set rather than just one or two components individually.
What is a Tritan coating?
One of our brands iwis, an OE manufacturer, produces complete timing chain sets that include everything needed. Their chains incorporate a Tritan coating that extends the life of the chain. The pins that hold the chain links together often take the most abuse leading to degradation and chain stretching. The Tritan coating reduces the wear significantly.
What are timing belts?
Timing belts are made from rubber with nylon or fiberglass reinforcement. They are generally quieter than their chain counterparts but have a limited lifespan that requires replacement according to the guidelines of the manufacturer. Neglecting the replacement intervals will often lead to a broken timing belt and potential engine damage from belt failure. Snapped timing belts can allow the pistons to contact the cylinder head valves, which will cause significant damage.
Timing belts can either be a wet application or a dry application. The wet applications turn in the engine oil. This, to build the engine in a more compact way. Timing belts may have an inspection hole in the timing cover to verify the belt’s condition between replacement intervals. There may be a rubber plug mounted or an attached cover that can be removed to review the belt condition and determine if the belt needs replacement before the standard replacement interval. Dayco, one of our timing belt suppliers, offers complete timing belt kits that may include belts, replacement tensioners and guides, water pumps, and oil pumps, depending on the application.
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When do I need to replace my timing chain or timing belt?
Regular inspections and timely replacements are crucial to maintaining engine reliability and avoiding costly repairs. Always use the correct oil for your engine and change it at the manufacturer-recommended interval to ensure the engine oil properly lubricates the engine and timing components. Overdue oil changes can lead to premature timing chain and timing belt wear.
If you have any question on timing chain or timing belts, please contact our specialists for more information at sales@wilminkgroup.com.