.: 2005 Highlander Serpentine Drive Belt Replacement

My 2005 Toyota Highlander is getting up there in miles at 136,000. For the last several months it has been making a very annoying squealing noise every time we start it. I have fixed this problem replacing the serpentine belt after much research and will share the do-it-yourself solution with all.

The trouble was a loose, worn serpentine or drive belt. The V6 2005 Toyota Highlander Limited has two serpentine belts. There is a larger 1) Alternator Belt- 3.3 Liter, and a smaller 2) P/S Belt 3.3 Liter. My troublemaker was the larger belt.

I replaced only the larger belt, but a good argument could be made that both belts should be replaced at the same time.

Required Parts

1. Alternator Belt 3.3 Liter- $19.08
2. P/S Belt 3.3 Liter- $10.45

Required Tools

• Socket Set 5mm-21mm
• 12” Extension
• Universal Joint
• Ratchet
• Torque Ratchet
• Belt Tension Gauge

Accessing the Belts
The first few steps are required in order to access the belts. The front passenger side wheel must be removed as well and the front passenger side fender apron seal. This provides access the smaller belt and the lower portion of the larger belt.

Removing the Alternator Belt
The Alternator Belt must be removed first. To remove it, loosen bolts A and B. Then loosen bolt C to let the tension off the belt sufficiently to allow sliding the belt off the pulley on the alternator.

Removing the P/S Belt
Once the Alternator Belt is removed, the P/S Belt may be removed. To remove it, loosen bolts A and B. This will let the tension off the belt sufficiently to allow sliding the belt off the pulleys.

Install the new P/S Belt
Ensure the belt is routed according the diagram. Use a bar to adjust the belt tension then tighten bolt B. Tighten bolt A.

• P/S Belt Tension: New-132 to 154 lbf, Used- 55 to 88 lbf
• Torque Bolt B: 43 N.m (438 kgf.cm, 32 ft.lbf)
• Torque Bolt A: Torque: 43 N.m (438 kgf.cm, 32 ft.lbf)

Install the new Alternator Belt
Ensure the belt is routed according to the diagram. Turning Bolt C in the wheel well will assist in seating the belt on the pulleys. Tighten Bolt C to adjust belt tension. Once belt tension is adjusted, tighten Bolt A first, then Bolt B.

• Alternator Belt Tension: New- 143 to 165 lbf, Used- 80 to 132 lbf
• Torque Bolt A: 58 N.m (591 kgf.cm, 43 ft.lbf)
• Torque Bolt B: 18 N.m (184 kgf.cm, 13 ft.lbf)

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