How to Route the Alternator Belt for BYD Song?
2 Answers
The routing method for the alternator belt of BYD Song is as follows: 1. Before assembly, the final cleaning must be done with gasoline to ensure all parts are clean and dry, guaranteeing tight fitting surfaces free of oil and sufficient friction. 2. When assembling the hex socket head bolts, they should also be cleaned with gasoline and dried before assembly. Do not apply lubricating oil or grease to the bolts or threaded holes to ensure sufficient frictional self-locking capability after tightening. 3. When the three hex socket head bolts are nearly in place, tighten them alternately to ensure the taper sleeve is subjected to uniform axial force, guaranteeing good coaxial alignment between the pulley and the taper sleeve. 4. Before installation, measure the length of the hex socket head bolts used for assembly to ensure that after tightening, the bolts can press against the bottom of the blind hole in the taper sleeve, ensuring tight conical surface contact and that the bolts receive reverse thrust from the bottom of the blind hole, creating a locking effect similar to the double-nut principle. 5. After tightening the pulley, check and adjust the relative positions of the driving and driven pulleys with a tension gauge to ensure both pulleys are in the same plane and the belt is properly tensioned. 6. The pulley cover should be intact and securely installed to prevent serious safety accidents caused by belt breakage or pulley loosening during operation. 7. The taper sleeve is a wear-prone part. After prolonged operation, the inner hole and keyway may become damaged. Inspect it before each assembly and replace defective parts promptly.
Last time I removed the Song's alternator belt, I paid special attention to the routing sequence - this absolutely cannot be messed up. First disconnect the battery negative terminal for safety, then locate the crankshaft pulley as the starting point. Route the belt sequentially around the water pump, alternator, and power steering pump components, finally passing through the tensioner pulley for securing. Remember to use a tool to turn the tensioner bolt counterclockwise to create slack. After installing the new belt, verify the belt's arrow direction matches the crankshaft rotation. Don't rush off after installation - start the engine and listen for any squealing noises which may indicate improper tension adjustment. Most newer models now use 5PK multi-rib belts which are less prone to slipping compared to older vehicles. The most critical part is referencing the belt routing diagram on the underside of the hood - routing differs between model years. When doing this yourself, wear protective gloves as the tensioner spring has tremendous force and can easily pinch fingers.
