[Image of Serpentine Belt Diagram]
Here is a step-by-step guide on how to replace the serpentine belt on a 2003 Toyota 4Runner 3.4L V6 engine.
1. Remove the skid plate under the engine.
2. Locate the serpentine belt tensioner. It is located on the front of the engine, just below the water pump.
3. Insert a wrench between the tensioner pulley and the idler pulley.
4. Turn the wrench to rotate the tensioner pulley clockwise. This will loosen the serpentine belt.
5. Remove the serpentine belt from the pulleys.
6. Install the new serpentine belt by wrapping it around the pulleys in the correct order.
7. Turn the tensioner pulley clockwise to tighten the serpentine belt.
8. Reinstall the skid plate.
Here is the correct belt routing sequence:
1. Start at the crankshaft pulley.
2. Loop the belt over the idler pulley located beneath the tensioner.
3. Turn a sharp corner and route it along the inner face of the power steering and air conditioner compressor belt.
4. Continue clockwise, around the upper idler puller.
5. Go clockwise around the water pump.
6. Finish by bringing it back around to the crankshaft pulley.
