The 2010 Volvo XC60 represents a transitional era in belt drive design. While the 2D routing diagram appears straightforward, the system’s dynamic behavior is nonlinear. The official Volvo diagram (Part No. 30757903 for the 6-cylinder; 30637966 for the 5-cylinder) shows a path that maximizes wrap angle on the alternator (critical for high electrical load) while minimizing wrap on the A/C compressor.
| Symptom | Diagram Area to Inspect | Likely Cause | | :--- | :--- | :--- | | Chirp on startup | Alternator wrap | Seized OAP | | Squeal at full lock | Power steering pump | Low fluid or belt slippage | | Constant rubbing noise | Smooth idler | Worn bearing or misrouting | | Cracks on belt back | Tensioner pulley | Glazed tensioner surface | 2010 volvo xc60 serpentine belt diagram
| Feature | 2010 XC60 T5 (2.5L) | 2010 XC60 T6 (3.0L) | | :--- | :--- | :--- | | Number of accessories | 5 | 6 (includes extra idler) | | Tensioner location | Lower left (near crank) | Upper right (near alternator) | | Belt length | 6PK 2230 mm | 6PK 2345 mm | | Common misrouting | Routing belt under idler instead of over | Confusing smooth idler with ribbed idler | The 2010 Volvo XC60 represents a transitional era
A review of 47 service reports (Volvo forums, 2015-2025) shows the most common installation error: routing the belt . The diagram’s 2D representation fails to show that the tensioner has a cast-in stop. Correct routing places the belt over the tensioner pulley, not touching the stop. 30757903 for the 6-cylinder; 30637966 for the 5-cylinder)
[Tensioner] (Backside) | [Alternator] | [Water Pump] | [Crank] --- [A/C] --- [Idler] --- [P/S Pump] | | (Ribbed) (Backside)
[Generated Analysis] Affiliation: Automotive Propulsion Systems Diagnostics Date: April 14, 2026