Dayco’s automatic belt tensioner maintains proper belt tension throughout the belt drive by incorporating an automatic, spring-loaded tensioner into the drive system geometry. It features a patented “flat spring” design that’s engineered to provide less operating range variations in tension. This reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed. It also lessens the risk of belt squeal and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A Teflon strip wound within the spring resists abrasion. The flat spring itself is coated to resist rust.

Other superior design features include:

• A heavy-duty cast aluminium spring case resists cracking and fatigue.
• A heavy-duty cast aluminium arm offers additional strength and less distortion.
• An aluminium retainer ring locks the spring case and arm together, and seals against corrosion.
• A thermoplastic rubber “spring slot plug” keeps out harmful contaminants.
• The lubricated nylon “pivot tube bushing” and “spring bushing” promote quieter performance.
• A rubber “O” ring seals against dust and grime.
• The zinc coated mounting bolt resists rust, and is concentric for a more even degree of constant tension.

In order to meet OEM performance standards, this Dayco automatic tensioner comes with a steel pulley that features a dust cover to protect against contaminants.

Vehicle Fitment Guide

This premium replacement Ribbed steel idler/tensioner pulley suits the serpentine belt drive in Holden VF Commodores and similar platforms fitted with the Alloytec LWR & SIDI LFW LFX 3.0L 3.6L V6 engines.

Specifications:

• Type: 6PK Ribbed steel
• Width: 27mm
• Outside diameter: 70mm
• Inside diameter: 17mm

Contents:

• 1 X Ribbed steel idler/tensioner pulley

​​​Vehicle Fitment Guide

This premium replacement Ribbed steel idler/tensioner pulley suits the serpentine belt drive in Holden VF Commodores and similar platforms fitted with the L77 LS3 6.0L 6.2L V8 engines.

Specifications:

• Type: 6PK Ribbed steel
• Width: 27mm
• Outside diameter: 70mm
• Inside diameter: 17mm

Contents:

• 1 X Ribbed steel idler/tensioner pulley

​​​Vehicle Fitment Guide

This premium replacement Ribbed steel idler/tensioner pulley suits the serpentine belt drive in HSV vehicles and similar platforms fitted with the LS3 and LSA Supercharged 6.2L V8 engines.

Specifications:

• Type: 6PK Ribbed steel
• Width: 27mm
• Outside diameter: 70mm
• Inside diameter: 17mm

Contents:

• 1 X Ribbed steel idler/tensioner pulley

​​​Vehicle Fitment Guide

This Flat steel Dayco Nuline Idler/Tensioner pulley is designed to provide reliability and performance, helping your belt last longer and provide reliable service to your engine for coming years.

Nuline Idler/Tensioner pulleys are made of high quality material and utilise the best ball bearings, which are OEM manufactured and feature C3 rated high speed races, high temperature lubricant and heavy duty silicone seals for maximum service life at high RPM's.

This Idler/Tensioner pulley suits Holden Commodores and similar platforms fitted with 304 5.0L and LS1, L76, L77, L98 & LS3 5.7L, 6.0L & 6.2L V8 engines.

Specifications:

• Width: 23mm
• Outside diameter: 65mm
• Inside diameter: 17mm

Contents:

• 1 X Flat steel idler/Tensioner pulley

Vehicle Fitment Guide

This Flat steel Dayco Nuline Idler/Tensioner pulley is designed to provide reliability and performance, helping your belt last longer and provide reliable service to your engine for coming years.

Nuline Idler/Tensioner pulleys are made of high quality material and utilise the best ball bearings, which are OEM manufactured and feature C3 rated high speed races, high temperature lubricant and heavy duty silicone seals for maximum service life at high RPM's.

This Idler/Tensioner pulley suits HSV ClubSports and similar platforms fitted with the 304, LS1, LS2, LS3 and LSA V8 engines.

Specifications:

• Width: 23mm
• Outside diameter: 65mm
• Inside diameter: 17mm

Contents:

• 1 X Flat steel idler/Tensioner pulley

Vehicle Fitment Guide

This Dayco Nuline Tensioner pulley is designed to provide reliability high quality performance, helping your belt last longer and provide reliable service to your engine for coming years.
Nuline Tensioner pulleys are made of high quality material and utilise the best ball bearings, which are OEM manufactured and feature C3 rated high speed races, high temperature lubricant and heavy duty silicone seals for maximum service life at high RPM's.

This tensioner pulley suits a range of Chevrolet vehicles fitted with the LS1, LS2, L98, LS7 and LT1 V8 engines.

Specifications:

• Type: 6PK steel
• Width: 27.20mm
• Outside diameter: 70mm
• Inside diameter: 17mm 

Contents:

• 1 X Tensioner pulley

Vehicle Fitment Guide

This Dayco Nuline Tensioner pulley is designed to provide reliability and high quality performance, helping your belt last longer and provide reliable service to your engine for the coming years.
Nuline Tensioner pulleys are made of high quality material and utilise the best ball bearings, which are OEM manufactured and feature C3 rated high speed races, high temperature lubricant and heavy duty silicone seals for maximum service life at high RPM's.

This tensioner pulley suits a range of HSV vehicles fitted with the LS1, LS2, LS3 and LSA V8 engines.

Specifications:

• Type: 6PK steel
• Width: 27.20mm
• Outside diameter: 70mm
• Inside diameter: 17mm

Contents:

• 1 X Tensioner pulley

Vehicle Fitment Guide

This Nuline Idler/Tensioner pulley is designed to provide reliability and performance, helping your belt last longer and provide reliable service to your engine for coming years. These Idler/Tensioner pulleys are made of high quality material and utilise the best ball bearings, which are OEM manufactured and feature C3 rated high speed races, high temperature lubricant and heavy duty silicone seals for maximum service life at high RPM's.

This Idler/Tensioner pulley suits Holden Captiva fitted with Z24SED, LE5 and LE9 I4 engines.

Specifications:

• Type: Flat steel
• Width: 29.50mm
• Outside diameter: 82mm
• Inside diameter: 17mm

Contents:

• 1 X Flat steel idler/Tensioner pulley

Vehicle Fitment Guide