Hoot/Whistling at Start-Up during Cold Temp (Replace Idler Pulley Assembly)

Some owners may comment on a loud "hoot" or whistling noise from the engine compartment during start up at cold ambient temperature of 0°C (32°F) or less. The noise would be of short duration, 5 seconds or less, and would not re-occur until the next cold ambient start up. This characteristic makes the condition difficult to diagnose in the dealership environment.

This condition may be caused by the bearing in the idler pulley. This condition will not occur when the engine is warm. A newly designed idler pulley is available from Service Parts Operations. The new pulley has a bearing with improved cold temperature performance characteristics.

Replace the idler pulley assembly. Refer to Service Information for replacement procedure.

Parts are expected to be available January 15, 2001.

For vehicles repaired under warranty, use: