Jeep TSB #07-002-15
2011 Jeep Grand Cherokee
Affected Component: ENGINE (PWS)
- Idler Pulley Noise During Cold Start This bulletin involves replacing the idler pulley. The customer may describe a loud high frequency noise that happens within 20 seconds of engine startup and lasts about 90 seconds intermittently during a cold engine start, approximately 0 degrees C (32 degrees F) and below.