Atlas Belt Tensioner Failure Causing Engine Noise & Skip

I experienced similar symptoms on my 2016 VW Tiguan with the 2.0 TSI engine. The engine noise started as a subtle squeak but progressed to a clear serpentine belt squeal, especially during cold starts. The automobile maintenance revealed several issues: Worn belt tensioner pulley bearings, Damaged serpentine belt with visible cracks, Belt drive system misalignment The belt tensioner failure was causing improper tension, leading to belt slippage. This is a serious issue that requires prompt attention, as a failed serpentine belt can leave you stranded and potentially damage other engine components. Key points to check during repairs: Make sure they inspect all pulleys for wear, Request inspection of water pump bearing, Verify belt alignment after replacement, Confirm proper tension specifications are followed The repair should include replacement of both the serpentine belt and tensioner assembly. Having dealt with this myself, I recommend replacing both components together since they wear as a system. Most VW engines from this generation share similar belt drive designs, making this a common maintenance item.

Thanks for sharing your experience. My car had the same symptoms, started with a minor squeak and got worse. The idler pulley was completely shot, causing the engine noise to get really bad. My mechanic ended up replacing both the tensioner pulley and serpentine belt as a complete job. Been about 6 months now and everything is running smooth with no issues. Just curious, what did the full repair cost you? And have you noticed any other problems come up since getting it fixed? Always good to know what to watch out for with these belt drive systems.

Since fixing the bad belt tensioner and idler pulley system 6 months ago, my engine performance has been flawless. The total repair came to 455€ for parts and labor. The automobile maintenance included a complete timing belt system inspection to ensure no related components were affected. The mechanic did a thorough job checking all connecting parts while the engine was opened up. No additional issues have surfaced since the repair. The engine noise is completely gone and the belt runs perfectly aligned now. This type of repair often prevents more serious problems down the road if caught early enough. If your tensioner is starting to fail, getting it fixed promptly helps avoid damage to other components in the belt drive system. These repairs may seem expensive but they are crucial for proper engine operation and longevity.

Thanks everyone for the helpful replies. I finally got my Atlas fixed last week after the belt squeal became unbearable. Took it to a certified VW shop this time instead of my usual mechanic. The diagnosis confirmed exactly what was mentioned, worn tensioner and damaged serpentine belt. Total repair cost came to 520€, which included a full belt drive system inspection. The mechanic showed me the old components, the tensioner was completely shot and the belt had several cracks. Engine performance is back to normal now with no more squealing or skipping. They also spotted and fixed a minor pulley misalignment during the repair. Really glad I got this sorted before it caused bigger problems. The service included a 12-month warranty on parts and labor, which gives me peace of mind. For anyone facing similar issues, definitely worth getting it checked by someone who knows these engines well.