Dayco 15515 Accessory Drive Belt

Accessory Drive Belt for Classic Vehicle Applications

The Dayco 15515 accessory drive belt is built for accessory drive systems that require a 51.50-inch effective length and a 36-degree angle profile. With a top-cog construction and synthetic rubber compound, it is specified for a wide range of fan, alternator, air conditioning, air pump, and power steering applications across classic Buick, Chevrolet, Oldsmobile, Pontiac, Jeep, Ford, Chrysler, and GMC vehicles.

Dayco 15515 is a direct-fit accessory drive belt for many older vehicles, including applications such as the Buick Regal, Chevrolet Monte Carlo, and Pontiac Grand Prix. It is also cross-referenced to Gates 11A1310 and Bando 2515 for the same application.

Key Features

• Synthetic rubber compound for accessory drive service
• Top cog belt construction for flexible operation
• Black finish with .44 top width
• Effective length: 51.50 in. (1308.10 mm)
• Outside circumference: 52.07 in. (1322.58 mm)
• 36-degree angle profile
• Meets SAE J636 and SAE J637 standards
• Operating temperature range: -35 to 175 degrees F

Detailed Description

This Dayco accessory drive belt is engineered for vehicles that use a V-belt style accessory drive system. The top-cog design helps the belt flex around pulleys in fan, alternator, air conditioning, air pump, and power steering layouts, making it a practical replacement for many vintage and classic driveline configurations. The 15515 part number appears across numerous OE and aftermarket references, which helps simplify matching during service work on older Buick, Chevrolet, Pontiac, Oldsmobile, Jeep, Ford, Chrysler, and GMC models.

Common fitment examples include the 1981-1987 Oldsmobile Cutlass Supreme, 1985-1987 Buick Regal, and 1985-1987 Pontiac Grand Prix, along with many other listed applications. Use the vehicle’s accessory layout and belt length requirements to confirm the correct match before installation.

What This Belt Helps Solve

• Squealing or slipping accessory drive belt noise
• Cracked, glazed, or worn belt surfaces
• Loss of alternator, fan, air conditioning, or power steering drive
• Incorrect belt length for restored or serviced accessory systems
• Drive issues on older vehicles with V-belt accessory layouts

Installation Notes and Tips

Verify the belt path, pulley count, and accessory configuration before installation. This belt is listed for multiple positions, including fan and air conditioning, fan and air pump, power steering, fan and alternator, and related accessory drive layouts. Confirm the required effective length and outside circumference against the vehicle’s existing belt or service specification, especially on vehicles with equipment variations such as air conditioning, heavy-duty cooling, or alternate alternator output.

For best results, inspect pulleys and accessory brackets for wear, misalignment, or contamination before installing the new belt. Proper tension and alignment are important for stable operation and belt life.

Quality Assurance

Dayco manufactures this belt to SAE J636 and SAE J637 standards, with a synthetic rubber compound selected for accessory drive service across a broad operating temperature range. The Dayco 15515 is built for direct replacement use in confirmed applications and is supported by extensive OE and aftermarket interchange coverage.