You may wonder what the difference is between a timing chain and a timing belt. Call your dealer for a precise interval for your specific Audi. Please use this list as a reference only (it should be accurate or at least close). Please know that Audi may have released some TSBs (Technical Service Bulletin) that could have changed these intervals. Here is a quick list of service intervals I have found. Timing chains are usually more durable and require less maintenance. Some cars use a timing chain to accomplish this. In a standard 4-stroke engine, the camshaft rotates twice to every rotation of the crankshaft. This allows the valves in the cylinder head to open and close at times needed to create compression and power. What a Timing Belt DoesĪ timing belt synchronizes the rotation of the crankshaft and camshaft.
I will continue to build and add on to this article as time goes on with information to help anybody understand Audi’s timing system. My goal is to make this a complete resource for anything Audi timing belt-related. I wrote this article because there is a lot of information on timing belts, especially for Audi’s. If that happens, it could mean that you need a complete new engine.Ah, the timing belt. The piston simply hits the valves if they are open when the piston is depressed. Some engines have plenty of space, while others are built so that there is no room if the pistons and valves are positioned wrong. The most dangerous thing that can happen is if it becomes so worn or defective that it no longer synchronizes pistons and valves. Here it may contribute to cause Flash Rust. If you do not change the timing belt, you risk that it frays, and bits become loose around the engine compartment and out onto the road. The timing belt consists of steel wire, fiberglass, polyester and Kevlar cables. Even if you do not drive very much, there is a risk that the timing belt becomes weathered and damaged. Usually cars will need their timing belt changed after a certain mileage or after a certain time period. You can find the manufacturer reccomendations in your service manual. The timing belt is extremely durable and can take many years of use, however it will have general wear and tear that will eventually result in the timing belt needing to be replaced. What happens if the timing belt is not replaced? The timing belt has teeth like ridges along the belt, these teeth fit within ridges in the cogs that are in turn pushed and pulled by the timing belt. The valves must be open at the intake and exhaust, and the pistons must have be in the correct position when the fuel-containing air ignites. When the piston is fully open, it is pulled back again, while the exhaust valve is open. It pushes the piston and drives the process in the other chambers. The fuel containing compressed air ignites and explodes.
Then the valve closes and the piston depresses. Technically, what happens is that the intake valve opens and the piston draws air into the chamber. It ensures that the valves and pistons in the engine are in line. The timing belt is a transmission belt operated by the crank shaft and also operates the cam shaft.
If they are out of sync, it can have disastrous consequences, in addition to an irregular and wasteful operation. The timing belt controls one of the engine's main functions the interaction between the pistons and valves.
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