Drive Belts & Kits
Drive Belt Automatic Tensioners
Drive Belt Idler & Tensioner Pulleys
Overrunning Alternator Pulleys
Harmonic Balancers OEM Replacement
Performance Balancers & Kits
Engine Specific Harmonic Balancers
Chevrolet 250, 292 Cubic Inch L6, Single VeeChevrolet 283, 307, 327 Cubic Inch 6-1/4"Chevrolet 283-350 Small Block V8 7"Chevrolet 283-350 Small Block 7" To Suit Big Block Crank SnoutChevrolet 283-350 Small Block V8 8"Chevrolet 350 (5.7L) Small Block LT1 1993-1997 (Crank Flange Mount) Serpentine BeltChevrolet 400 Small Block 7" Light WeightChevrolet 400 Small Block V8 8"Chevrolet 396, 402, 427 Big Block V8 8"Chevrolet 454 Big Block V8 Light Weight Neutral Balance 7"Chevrolet 454 Big Block V8 8"Chrysler 225 Slant 6Chrysler 245-265 Hemi 6 cylChrysler 318, 340 Small BlockChrysler 360 V8Chrysler 392 Big Block HemiChrysler 383, 440 Big Block V8Ford 302, 351 Cleveland V8 Counterweight HubFord 351 Cleveland V8 4 Bolt, Hub Counter Weight, XW-XY GTHO Phase I, II, IIIFord 302, 351 Cleveland V8 Neutral BalanceFord 302, 351 Cleveland V8 Counterweight Hub for Scat Cranks 12.7 ozFord 289, 302 Windsor 3 Bolt (Countersunk Pulley Location) 28oz. in.Ford 289, 302 Windsor 3 Bolt (Raised Pulley Location)Ford 302, 351 Windsor V8 3 Bolt (Raised Pulley Location) 28oz. in.Ford 302, 351 Windsor V8 3 Bolt (Countersunk Pulley Location) 28oz. in.Ford 302, 351 Windsor 4 Bolt (Raised Pulley Location) 28oz. in.Ford 302 Windsor EFI V8 4 Bolt 34oz. in. with FlywheelFord 302 Windsor 4 BoltFord Windsor Small Block 6" 3 BoltFord 302, 351 Windsor Neutral Balance 4 BoltFord 390 Big Block FE V8 Internal BalanceFord 460 Big Block Internal BalanceFord Y-Block V8 1955-62 "Single Vee"Pontiac GTO 5.7L LS1, 6.0L LS2 V8 Serpentine BeltPontiac 287-455 Cubic Inch V8
CVT Scooter Belts
ATV Outdoor Activity Belts
Industrial V-Belt
Timing Belt & Kits
Timing Chain Kits
Timing Belt - Hydraulic Automatic Tensioners (HAT)
Water Pumps
Automotive Caps
Thermostats, Gaskets & Outlets
Heater Tap Control Valves
Radiator Coolant Tanks
Fan Clutches
Hose Air
Hose Air Intake
Hose Fuel
Hose Heater/Blanking Caps
Hose Radiator
Hose Service
Hose Turbo
Hose Clamps

Automatic Belt Tensioners

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.

Click on a column heading to sort the items in the list

Part numberDescription
132004Automatic Belt Tensioner
132006Automatic Belt Tensioner
132007Automatic Belt Tensioner
132008Automatic Belt Tensioner
132009Automatic Belt Tensioner
132010Automatic Belt Tensioner
132012Automatic Belt Tensioner
132013Automatic Belt Tensioner
132014Automatic Belt Tensioner
132015Automatic Belt Tensioner
132017Automatic Belt Tensioner
132018Automatic Belt Tensioner
132019Automatic Belt Tensioner
132020Automatic Belt Tensioner
132021Automatic Belt Tensioner
132022Automatic Belt Tensioner
132023Automatic Belt Tensioner
132024Automatic Belt Tensioner
132025Automatic Belt Tensioner
132026Automatic Belt Tensioner
132028Automatic Belt Tensioner
132029Automatic belt tensioner (replaces 132001 & 132003)
132030Automatic Belt Tensioner
132031Automatic Belt Tensioner
132032Automatic Belt Tensioner
132033Automatic belt tensioner (Manual Trans)
132034Automatic Belt Tensioner
132035Hydraulic Belt Tensioner
132036Hydraulic Belt Tensioner
132037Automatic Belt Tensioner
132038Automatic Belt Tensioner
132039Automatic Belt Tensioner
132040Automatic Belt Tensioner
132041Automatic Belt Tensioner
132042Automatic Belt Tensioner
132043Automatic Belt Tensioner
132044Automatic Belt Tensioner
132045Automatic Belt Tensioner
132046Automatic Belt Tensioner (Auto Trans)
132048Automatic Belt Tensioner
132049Automatic Belt Tensioner
132050Automatic Belt Tensioner
132051Automatic Belt Tensioner
132052Automatic Belt Tensioner
132053Automatic Belt Tensioner
132054Automatic Belt Tensioner
132055Automatic Belt Tensioner
132056Automatic Belt Tensioner
132057Automatic Belt Tensioner
132058Automatic Belt Tensioner