Dayco Automatic Belt Tensioner for Lexus GS F GS460 IS LC500 LS460 RCF

Dayco No Slack Automatic Belt Tensioner

Designed to maintain constant tension on serpentine belt drives
Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories.

To maintain the proper tension throughout the drive, an automatic, spring-loaded tensioner is incorporated into the drive system geometry.

Dayco’s Automatic Belt Tensioner 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 steel locator pin (where the application demands).

A heavy-duty cast aluminium spring case resists cracking and fatigue. The 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 steel pivot tube (where the application demands) provides additional strength for critical torque requirements.

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, Dayco Automatic Tensioners come with either a glass-filled polymer (plastic) or steel pulley, that features a dust cover to protect against contaminants.

Fits the following Make, Model, Series:

Lexus > GS F > Dec 2015 - , 5.0L, V8, 32V, DOHC VVT, MPFI, URL10R, 351kW, EngCode: 2URGSE

Lexus > GS460 > Apr 2008 - Mar 2012, 4.6L, V8, 32V, DOHC, MPFI, URS190R, 255kW, EngCode: 1UR-FSE

Lexus > IS F > Oct 2008 - , 5.0L, V8, 32V, DOHC VVT, MPFI, USE20R, 311kW, EngCode: 2URGSE

Lexus > LC500 > Jun 2017 - , 5.0L, V8, 32V, DOHC VVT, MPFI, URZ100R, 351kW, EngCode: 2URGSE

Lexus > LS460 > Aug 2006 - , 4.6L, V8, 32V, DOHC, MPFI, USF40R, 280kW, EngCode: 1UR-FSE

Lexus > RCF > Nov 2014 - , 5.0L, V8, 32V, DOHC VVT, MPFI, USC10R, 351kW, EngCode: 2URGSE