Owners of 2008-2010 VW vehicles equipped with the 2.0L engine may complain of a rattling noise from the engine or exhaust area while accelerating from 1,800 to 3,000 rpm. In order to complete proper diagnosis and ensure that the noise is coming from the turbocharger, use the following procedure:
- Ensure that there is no physical internal or external damage to the turbocharger. If damage is observed, continue diagnosis and repair as necessary. If no damage is observed, proceed to Step 2.
- Test drive the vehicle to duplicate and familiarize yourself with the noise. Noise can typically be duplicated by driving up a moderate incline, beginning at 35 mph in 4th gear (manual or automatic transmission) and accelerating through the rpm range of 1,800 to 3,000 rpm under moderate to heavy throttle. Obey all traffic laws.
- Once you have confirmed the noise, attach a 2-ounce wheel weight to the wastegate actuator rod and test drive again.
If, after attaching the weight to the actuator rod, the noise is quieter or has changed in pitch, DO NOT replace the turbocharger. Remove the wheel weight, create a VTA ticket in ElsaWeb and contact the Volkswagen Technical Helpline at 800-678-2389. If after attaching the weight to the actuator rod and the noise has not changed, remove the weight and continue diagnosis and repair as necessary.
Use caution when diagnosing the origin of the noise. Although the noise may be originating from the turbocharger, it can be amplified through resonance to the catalytic converter and can be misdiagnosed as a loud converter.