Canada - Engine - Accessory Drive Belt Squealing Noises

Bulletin
TSB2506R

Issue Date
2006-05-08

Market
Canada

Title
2UZ - FE ACCESSORY DRIVE BELT NOISE

Component
ENGINE MECHANICAL

Models
'00 - '06 Tundra

TSB REVISION NOTICE:
- August 21, 2007: The Introduction has been updated. Production Change Effective VINs have been updated in the Production Change Information table. In the Repair Procedure steps 12 and 13 and the illustration below step 13 have been updated, and steps 14 - 17 have been renumbered.
Previous versions of this TSB should be discarded.

INTRODUCTION:
Some customers may experience an abnormal squeal noise from the engine accessory drive belt area, usually during cold start-up. An improved accessory drive belt tensioner, A/C compressor bracket, and revised installation procedure have been developed to address this condition.

APPLICABLE VEHICLES:
- 2000 - 2006 model year Tundra vehicles produced BEFORE the Production Change Effective VIN shown below.






PRODUCTION CHANGE INFORMATION:






PARTS INFORMATION:






WARRANTY INFORMATION:

REPAIR PROCEDURE:
1. Remove the engine under cover.
2. Drain the engine coolant.
3. Remove the intake air connector assembly.
4. Remove the radiator fan shroud.






5. Remove the drive belt, fan, fluid coupling, and fan pulley.






6. Without disconnecting the power steering fluid lines, remove the power steering pump.

HINT:
Suspend the power steering pump securely.

7. Remove the drive belt idler pulley.
8. Remove the right hand (RH) No. 3 timing belt cover.






9. Remove the No. 2 timing belt cover.
10. Without disconnecting the A/C refrigerant lines, remove the A/C compressor from the mounting bracket.

HINT:
Suspend the A/C compressor securely.

11. Disconnect the A/C compressor mounting bracket.
12. Install the new A/C compressor mounting bracket. Install the NEW A/C compressor mounting bracket and hand tighten bolts 1 and 2 while holding the bracket forward (refer to illustration below).






13. While holding the bracket forward, tighten the A/C compressor mounting bolts in the following sequence: bolt 2, bolt 1, bolt 3.Torque: 47 N-m (475 kgf-cm, 34 ft-lbf)
14. Remove the accessory drive belt tensioner.






15. Install the new accessory drive belt tensioner.
16. Reassemble in the reverse order of disassembly.
17. Refill cooling system.

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.