Canada - Engine - Drive Belt Noise

Bulletin
TSB0668

Issue Date
April 21, 2004

Market
Canada

Title
ACCESSORY DRIVE BELT NOISE

Component
ENGINE MECHANICAL

Models
'01 - '04 GS430 & LS430
'02 - '04 SC430

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 improved V-Rib Belt has been developed to improve the condition.

APPLICABLE VEHICLES:
- 2001 - 2004 model year GS430 and LS430 vehicles produced BEFORE the Production Change Effective VIN shown below.
- 2002 - 2004 model year SC430 vehicles produced BEFORE the Production Change Effective VIN shown below.







PRODUCTION CHANGE INFORMATION:







PARTS INFORMATION:







WARRANTY INFORMATION:

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.







d) After the new V-rib belt has been installed, check that the mark in the image is within range "B" as shown.

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.