Roadmax 4K514AP Serpentine Belt - Fan or Alternator and Air Pump

Roadmax 4K514AP Serpentine Belt Overview

The Roadmax 4K514AP is a standard automotive V-ribbed belt built for accessory drive service on select Chevrolet S10 and S10 Blazer, plus GMC S15 and S15 Jimmy applications. It uses EPDM construction with a polyester cord for consistent belt tracking and OE-style performance in everyday driving.

Roadmax positions this belt line for budget-conscious buyers who want dependable replacement quality without stepping up to a premium-duty belt. The 4-rib design and 14 mm top width support fan, alternator, and air pump drive applications where the original belt specification calls for this size.

Key Features

• Part number: 4K514AP
• Automotive V-ribbed belt, standard grade
• EPDM rubber construction for accessory drive service
• Polyester cord material for belt stability
• 4-rib profile with 14 mm top width
• Effective length: 1306 mm (51.4 in.)
• Outside circumference: 1321 mm (52.01 in.)
• OE Performance grade type

Detailed Product Description

The Roadmax 4K514AP serpentine belt is specified for accessory drive systems that power the fan, alternator, and air pump on select 1985-1986 Chevrolet and GMC trucks and SUVs. It is a direct-fit style replacement for vehicles including the Chevrolet S10, Chevrolet S10 Blazer, GMC S15, and GMC S15 Jimmy in the listed configurations. This part cross-references Continental 4040515 and PK040514 for the same application.

As part of the Roadmax Automotive V-Ribbed Belt (Standard) line, this belt focuses on practical replacement value while maintaining the dimensions and material choices needed for OE-style service. The 4K514AP part number is also commonly searched as a replacement belt for 1985-1986 Chevrolet S10 serpentine belt and 1985-1986 GMC S15 accessory drive belt applications.

Common Problems This Belt Can Address

• Squealing or chirping from a worn accessory drive belt
• Cracking, glazing, or rib wear on the existing belt
• Loss of alternator, fan, or air pump drive performance
• Belt slip caused by age-related EPDM deterioration
• Incorrect belt length after replacing a worn original belt

Installation Notes and Tips

Verify belt routing against the vehicle’s accessory drive diagram before installation. Confirm the application by matching the 4-rib profile, 14 mm top width, and 1306 mm effective length to the original belt specification. For best results, inspect pulleys, tensioner condition, and accessory alignment before installing the new belt.

Fits 1985 Chevrolet S10, Fan, Alternator and Air Pump; Fits 1985 Chevrolet S10 Blazer, Fan, Alternator and Air Pump; Fits 1985 GMC S15, Fan, Alternator and Air Pump; Fits 1985 GMC S15 Jimmy, Fan, Alternator and Air Pump; Fits 1986 Chevrolet S10, Fan, Alternator and Air Pump; Fits 1986 Chevrolet S10 Blazer, Fan, Alternator and Air Pump; Fits 1986 GMC S15, Fan, Alternator and Air Pump; Fits 1986 GMC S15 Jimmy, Fan, Alternator and Air Pump.

Quality Assurance

Roadmax uses EPDM and polyester cord construction in this standard V-ribbed belt to support OE-style fit and everyday accessory drive service. The product is built to the Roadmax Automotive V-Ribbed Belt (Standard) specification for the listed applications.