This visual guide details the serpentine belt routing for the common 2.0L Zetec engine in the 2002 Ford Focus. The routing path is crucial for proper operation of accessories.
Serpentine Belt Diagram (2.0L Zetec Engine)
- Crankshaft Pulley (Large bottom pulley) - Belt rides on the outermost ribs.
- Automatic Tensioner Pulley (Positioned top-right) - Belt rides on the flattened (smooth) side against this pulley.
- Alternator Pulley (Located top-left) - Belt rides on the ribbed side.
- Water Pump Pulley (Found lower-left, beneath alternator) - Belt rides on the ribbed side.
- Power Steering Pump Pulley (Mounted center-right) - Belt rides on the ribbed side.
- Air Conditioning Compressor Pulley (Situated lower-mid right) - Belt rides on the ribbed side.
Routing Path (Standard Configuration):
- Start at the Crankshaft Pulley (ribbed side).
- Travel clockwise up and around the Water Pump Pulley (ribbed side).
- Continue clockwise to the Automatic Tensioner Pulley (smooth/back side).
- From the tensioner, go clockwise around the Power Steering Pump Pulley (ribbed side).
- Then, proceed clockwise down and around the Air Conditioning Compressor Pulley (ribbed side).
- Finally, go clockwise from the A/C Compressor back down to the starting point on the Crankshaft Pulley.
Important Notes:
- Verify Pulley Order: Double-check pulley positions relative to your specific engine before installation. An incorrect path causes immediate failure.
- Tensioner Safety: Use a suitable wrench/socket (typically 3/8" drive breaker bar) on the tensioner's square hole to release tension. Release slowly; spring force is strong.
- Belt Direction: Ensure the belt is seated correctly on all pulleys without twists. Ribs must fully engage grooves on all ribbed-side pulleys.
- Idler Pulley: This engine typically has an idler pulley adjacent to the tensioner. Inspect it for smooth rotation and bearing noise; replace if faulty during belt service.