Timing Chain Upper Guide Rail (Upper) - VW/Audi / 24v VR6 / Atlas / A3 / CC / Mk4 / Golf / Jetta | 066109514A

Product Information

An engine timing chain guide is a crucial component in an engine that works alongside the timing chain. Its primary role is to guide and maintain proper alignment of the timing chain as it synchronizes the rotation of the crank and camshaft. This synchronization is essential for the precise timing of the engine's valves, allowing the intake and exhaust valves to open and close at the correct intervals. The guide ensures that the timing chain follows the correct path around the sprockets of the crankshaft and camshafts, preventing misalignment. It helps minimize excessive movement or vibration of the timing chain, which can occur during engine operation. Timing chain guides work in conjunction with the timing chain tensioner to maintain the correct tension in the chain. Proper tension is critical to prevent chain slack, which can affect engine performance or lead to damage.

• Rattling or Clattering Noise: One of the most common signs of a failing timing chain guide is a rattling or clattering noise from the engine, especially when starting the car or idling. The noise is caused by a loose or misaligned timing chain hitting or rubbing against other engine components due to a worn or broken guide
• Engine Misfires: A worn or damaged timing chain guide can cause the timing chain to slip, leading to improper timing between the crankshaft and camshaft(s). This can result in engine misfires, where the fuel-air mixture in the cylinders is not ignited at the correct time
• Engine Stalling or Hard Starting: If the timing chain guide is severely worn or broken, the timing chain may slip enough to cause the engine to stall. You may also have difficulty starting the engine, as the chain is no longer properly aligning the timing of the camshafts and crankshaft

About Genuine VW Audi

The Volkswagen Group, also known as “VAG”, consists of Volkswagen, Audi, Lamborghini, Bentley, Bugatti, Porsche, Ducati, MAN, Scania, SEAT, and Skoda. The original parts used by VAG to build your car are available as replacement parts under the “Genuine VAG” brand. Manufactured under the direction of VAG, expect excellent quality and a premium price since these parts are available exclusively through the VAG Dealership network.

You may not realize this, but the parts that make up your VAG are not necessarily manufactured by VAG. No cause for concern, as VAG designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for VAG for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine VAG parts box and find an OEM branded part inside, simply with the addition of a VAG logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.

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