Gates 38766 belt tensioner for the 2022-2026 Chevrolet LCF 6500XD 6-cylinder 6.7L and other vehicles holds the accessory drive belt at the right tension. This automatic tensioner, also called a serpentine belt tensioner, works with a V-ribbed belt.
- FleetRunner Heavy-Duty automatic belt drive tensioner line
- Patented labyrinth seal that prevents contamination of the internal parts
- Steel pulley with dust shields that protect the internal bearings
- Double row bearings that carry more load and last up to 3X longer than two individual bearings
- Chrome-silicone round torsion spring for less flex-fatigue
- Patented damping mechanism for stability and reduced vibration
Quick facts
- Part: Gates 38766 belt tensioner
- Also called: serpentine belt tensioner
- Fits: 2022-2026 Chevrolet LCF 6500XD 6-cylinder 6.7L and other vehicles
- Position: Fan
- Material: Steel
- Condition: New
A squealing belt, a fluttering belt or uneven belt wear can mean the tensioner is wearing out. These signs alone do not prove this part is the problem, since a worn belt can cause them as well.
Fits
The 2022-2026 Chevrolet LCF 6500XD 6-cylinder 6.7L, the 2018-2023 Freightliner B2 6-cylinder 6.7L and the 2024-2025 Freightliner MC Line 6-cylinder 6.7L all take this tensioner, and so do more vehicles. The 2018-2023 Freightliner B2 6-cylinder 6.7L takes one. If your truck or bus is not named here, open the "Vehicles it fits" section and check your exact model and engine.
Specifications
Fit and size
- Position: fan
- Quantity per vehicle: 1
- Outside diameter: 74 mm (2.91 in)
- Bearing bore inside diameter: 17 mm (0.67 in)
- Width: 34 mm (1.34 in)
- Mounting holes: 1
- Pulleys: 1
Build and materials
- Type: automatic belt tensioner
- Material: steel
- Belt type: V-ribbed
- Pulley contact surface: smooth/backside, not flanged
- Condition: new
- Country of origin: United States
In the box
One belt tensioner assembly.
Interchange: 5258155 · 89475
Frequently Asked Questions
Does the Gates 38766 belt tensioner fit the 2018-2023 Freightliner B2 6-cylinder 6.7L?
Yes. Gates 38766 fits the 2018-2023 Freightliner B2 6-cylinder 6.7L, which takes one. Open the "Vehicles it fits" section to check other models.
What size is this Gates drive belt tensioner?
Gates 38766 has a 74 mm (2.91 in) outside diameter, a 34 mm (1.34 in) width and a 17 mm (0.67 in) bearing bore.
Is the pulley on this steel belt tensioner flanged or grooved?
No. The steel pulley is not flanged and has no grooves; its contact surface is smooth/backside, matching the V-ribbed belt type.
Can a squealing belt mean this tensioner is worn?
Yes. A squeal, a fluttering belt or uneven belt wear can mean this tensioner is wearing out, and a shop can test it.
What does the labyrinth seal on this belt tensioner do?
The patented labyrinth seal keeps contamination away from the tensioner's internal parts, and dust shields on the steel pulley protect the internal bearings.
