Engine - Drive Belt Chirping/Squealing Noises
ENGINEEG003-04
March 26, 2004
Title:
ACCESSORY DRIVE BELT NOISE
Models:
'01 - '04 GS 430 & LS 430,
'02 - '04 SC 430
Introduction
On some 2001 - 2004 model year GS 430, LS 430 and 2002 - 2004 model year SC 430 vehicles, the Accessory Drive Belt (V-Rib Belt) may make a squealing" or chirping" sound under certain conditions when the engine is first started. An updated V-Rib Belt has been developed to improve the condition.
Applicable Vehicles
^ 2001 - 2004 model year GS 430 and LS 430 vehicles produced BEFORE the Production Change Effective VINs shown below.
^ 2002 - 2004 model year SC 430 vehicles produced BEFORE the Production Change Effective VIN shown below.
Production Change Information
Parts Information
Warranty Information
Applicable Warranty*:
This repair is covered under the Lexus Comprehensive Warranty. This warranty is in effect for 48 months or 50,000 miles, whichever occurs first, from the vehicle's in-service date.
* Warranty application is limited to correction of a problem based upon a customer's specific complaint.
Repair Procedure
1. Remove Air Cleaner Inlet No. 1.
2. Remove accessory drive V-Rib Belt.
A. Loosen the belt tension by turning the belt tensioner counterclockwise, and remove the V-Rib Belt.
NOTE:
The tensioner pulley has a left-hand thread.
3. Inspect all pulleys, idlers, and the tensioner for misalignment or positioning at a different angle from the other drive belt components. If a misaligned component is found adjust as needed. Otherwise, belt noise may reoccur with the new belt.
4. Install new accessory drive V-Rib Belt.
A. Place the new V-Rib Belt in position except for Idler Pulley No. 2, as shown.
B. Loosen the V-Rib Belt by turning the belt tensioner counterclockwise.
C. Place the V-Rib Belt in position for Idler Pulley No. 2.
D. After the new V-Rib Belt has been installed, check that the mark in the image is within range "B" as shown.