Exhaust Gas Flap Noise Complaint Customers may report a high-pitched squealing or squeaking noise...

Bulletin number

LI49.00-N-080010

Component

Engine

Summary

Exhaust Gas Flap Noise Complaint Customers may report a high-pitched squealing or squeaking noise originating from the exhaust system, specifically near the exhaust gas flap. Cause The noise occurs during actuation of the exhaust gas flap. Internal movement within the flap mechanism, primarily the flap shaft and return spring, can generate friction-induced squeal. Remedy If a squealing noise is present at the exhaust gas flap, do not replace the entire exhaust gas flap assembly or exhaust system. Perform the following corrective action: 1. Confirm the noise originates from the exhaust gas flap actuator area. The squeal typically occurs when the actuator moves the flap during engine operation. 2. Solution: •Remove the Exhaust Gas Flap Controller (AR49.10-D-5507TSM - Remove/install exhaust gas flap controller). •Remove the original spring (Picture 1). •Install the new damping element in place of the spring (Picture 2 and Picture 3). -This damping element absorbs vibration and prevents squealing, eliminating the need for costly component replacements. •Reinstall the Exhaust Gas Flap Controller. •Perform initialization of Exhaust Gas Flap Controller (AD00.00-D-2000-06TS - Connect/disconnect diagnostic unit).

Owners of these vehicles have filed 18 complaints in the engine category.