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Gates 38511 Accessory Drive Belt Tensioner Assembly
| Brand | Gates 38511 |
|---|---|
| Position | Fan and Alternator, Air Conditioning, Fan To Air Conditioning, Fan and Air Conditioning, Fan, Alternator and Air Conditioning, Fan, and Fan, Alternator and Hub |
| Material | Steel |
| Pulley 1 Flanged | No |
| Bearing Bore Inside Diameter | 1.18 |
| Bearing Bore Inside Diameter | 30 |
| Width | 1.57 |
| Width | 40 |
| Outside Diameter | 2.95 |
| Outside Diameter | 75 |
| Mounting Hole Quantity | 1 |
| Belt Type | V-ribbed |
| Pulley Quantity | 1 |
| Bearing Bore Inside Diameter 1 (in) | 1.18 |
| Bearing Bore Inside Diameter 1 (mm) | 30 |
| Belt Type | V-ribbed |
| Contact Surface | Smooth/backside |
| Contents | Tensioner assy., bolt |
| Outside Diameter (in) | 2.95 |
| Outside Diameter (mm) | 75 |
| Pulley 1 Flanged | No |
| Width (in) | 1.57 |
| Width (mm) | 40 |
| Fits | — |
OE direct replacement. Automatic belt tensioner assembly for straightforward installation.
Steel construction. Built for durability in demanding accessory drive systems.
V-ribbed belt design. Smooth backside contact helps maintain consistent belt operation.
Cross-references Davico Mfg 49509, Dayco 89441 and Dorman - HELP 38511 for the same application. See all 16.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
OE Automatic Belt Tensioner for Accessory Drive Systems
Gates DriveAlign Premium OE Automatic Belt Tensioner 38511 is built for accessory drive belt systems that need consistent belt control and stable pulley tracking. This steel tensioner uses a smooth/backside pulley with a V-ribbed belt contact surface to help maintain proper belt tension in demanding engine environments.
Compatible With applications that use this style of automatic accessory drive belt tensioner, including select Ford, Chevrolet, GMC, and Dodge fitments. The Gates 38511 is also cross-referenced to Dayco 89441 for the same application.
Key Features
- Steel tensioner assembly for accessory drive belt system service
- Automatic belt tension control for V-ribbed belt applications
- Smooth/backside pulley contact surface
- Single-pulley design with 75 mm outside diameter
- 40 mm pulley width and 30 mm bearing bore inside diameter
- Includes tensioner assembly and bolt
- OE-style replacement from Gates DriveAlign Premium OE Automatic Belt Tensioner line
Product Details
The Gates DriveAlign Premium OE Automatic Belt Tensioner line is engineered for demanding OE-level belt drive requirements. Part number 38511 is designed as an accessory drive belt tensioner assembly with a steel body, one mounting hole, and a smooth pulley profile that works with the backside of a V-ribbed belt. In laboratory testing under severe vibration and contamination conditions, Gates FleetRunner heavy-duty tensioners have shown extended service life compared with many aftermarket alternatives, making this style of tensioner a strong choice for high-load engine accessory drives.
Use Gates 38511 when servicing a worn or noisy belt tensioner on vehicles such as Ford, Chevrolet, and GMC applications that call for this OE-style design. The part number 38511 is also commonly searched as a replacement for related OE and aftermarket references.
Common Problems This Part Addresses
- Belt squeal caused by weak or inconsistent tension
- Visible belt flutter or poor belt tracking
- Accessory drive noise from a worn tensioner bearing
- Reduced belt control from a fatigued spring mechanism
- Premature belt wear from misalignment or unstable pulley movement
Installation Notes and Tips
Inspect the belt, idler pulleys, and accessory drive components before installation. Confirm pulley alignment, belt routing, and mounting surface condition, and verify that the replacement tensioner matches the original pulley diameter, width, and bore dimensions. If the belt shows glazing, cracking, or edge wear, replace it during the same service interval.
Quality Assurance
Gates designs DriveAlign Premium OE tensioners to meet demanding OEM requirements for accessory drive service. The 38511 is built with steel construction and OE-style dimensions to support consistent belt tension control in real-world engine operation.
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