If you're in the market for a used 2012 Audi S4 or already own one, you may have heard about the timing chain issues that plagued these vehicles. While Audi has since addressed the issue, it's important to understand what caused the problem and how to prevent it from happening again. In this article, we'll delve into the topic and provide you with valuable information to help you make an informed decision.
The Cause of the Problem
The timing chain issue in 2012 Audi S4 models was caused by a defective timing chain tensioner. This tensioner was prone to premature wear and failure, which led to a loose timing chain. When the timing chain becomes loose, it can jump teeth on the sprocket, causing the engine to run poorly or not at all. In some cases, this can even result in engine damage.
If you experience any of the following symptoms, it's possible that your Audi S4 has a timing chain issue:
1. Engine Rattle
If you hear a rattling noise coming from the engine, particularly at idle, it could be a sign of a loose timing chain. This noise is caused by the chain hitting the inside of the timing chain cover.
2. Check Engine Light
If the check engine light comes on, it could be due to a timing chain issue. The engine control module (ECM) may detect a problem with the camshaft position sensor, which can be caused by a loose timing chain.
3. Poor Engine Performance
If your Audi S4 is running poorly, it could be due to a timing chain issue. This can manifest as reduced power, rough idle, or even stalling.
Preventing Timing Chain Issues
If you own a 2012 Audi S4 or are considering purchasing one, there are steps you can take to prevent timing chain issues:
1. Regular Maintenance
Regular maintenance is key to preventing timing chain issues. Audi recommends replacing the timing chain tensioner at 90,000 miles. However, it's a good idea to have the timing chain and tensioner inspected at least once a year.
2. Use High-Quality Oil
Using high-quality oil can help prevent premature wear of the timing chain tensioner. Audi recommends using synthetic oil with a minimum API rating of SN.
3. Listen for Engine Noise
If you hear any unusual engine noise, have it inspected immediately. Catching a timing chain issue early can prevent more serious engine damage.
Conclusion
The timing chain issue in 2012 Audi S4 models was caused by a defective timing chain tensioner. While Audi has since addressed the issue, it's important to understand what caused the problem and how to prevent it from happening again. By following the steps outlined in this article, you can help prevent timing chain issues and keep your Audi S4 running smoothly.
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