For accurate 2004 Toyota 4Runner serpentine belt routing, follow this technical guidance:
Critical Engine Specification
Identify your engine first:
- Standard engine: 4.0L V6 (1GR-FE engine code)
- Limited/Sport Edition: 4.7L V8 (2UZ-FE engine code)
Belt paths differ significantly between V6 and V8 configurations.
Official Sources for Diagrams
- Toyota Repair Manuals: Factory service manuals include precise diagrams. Printed manuals from 2004 remain the authoritative reference.
- Online Auto Portals: Major automotive information platforms host verified diagrams. Search "2004 4Runner belt diagram [V6/V8]" for schematic-only results.
Free Diagram Access Methods
- Check your vehicle's underhood diagram sticker (typically near radiator support or strut tower)
- Visit public library automotive databases via their research computers
- Utilize vehicle-specific forums' technical repositories
V6 (4.0L) Belt Routing Description
Components clockwise from crankshaft pulley:
Crankshaft → A/C Compressor → Idler Pulley → Power Steering → Water Pump → Alternator → Tensioner Assembly → Crankshaft
V8 (4.7L) Belt Routing Description
Components clockwise from crankshaft pulley:
Crankshaft → Coolant Pump → A/C Compressor → Idler Pulley → Power Steering → Alternator → Automatic Tensioner → Crankshaft
Critical Replacement Notes
- Release tension using the square 1/2" drive hole in the tensioner arm
- Verify pulley alignment before final tensioning
- Inspect all pulleys for bearing roughness and wobble
- Check belt deflection: 1/4" midpoint play at 22 lbs force
Warning: Incorrect routing causes immediate belt failure. Diagram differences exist between 2WD/4WD variants of V6 models. Always trace old belt path during removal.