LI49.00-P-066561 PDF

A service bulletin addressing exhaust system noises in certain vehicles equipped with the M177 engine. It details complaints of squeaking, rattling, and actuator noises, offering possible causes and remedies. Causes include lubrication needs for the exhaust flap shaft and bearings, and actuator electronic interference. Recommended remedies involve applying heat-resistant lubricating paste. Additional notes clarify the typical noise sources and conditions under which these noises occur.