DAYCOVehicle Self-Adjusting Belt Tensioners

DAYCO Belt Tensioner: Self-Adjusting Belt Tensioner, 89251, 1 Pulleys

The DAYCO Self-Adjusting Belt Tensioner (model 89251) is a vehicle belt tensioner with one pulley and a 3 1/2 in outside diameter. As an OEM-specified part, it is designed to maintain proper belt tension in…

SKU 3G-OTH-486304

Brand

DAYCO

Item

Belt Tensioner: Self-Adjusting Belt Tensioner, 89251, 1 Pulleys

Technical Specifications

DAYCO

Manufacturer Part Number

89251

Type

89251

Pulleys

1

Outside Dia

3 1/2 in 

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Technical Documents

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DAYCO Products

3G Electric (S) Pte. Ltd. — Singapore

Product Description

Frequently Asked Questions

What is the DAYCO 89251 belt tensioner used for?

The DAYCO 89251 self-adjusting belt tensioner maintains proper tension in automotive accessory drive systems. It is an OEM-specified replacement part with one pulley and a 3 1/2 in outside diameter, ensuring reliable operation of belts driving alternators, water pumps, and other engine accessories.

What are the specifications of the DAYCO 89251 belt tensioner?

The DAYCO 89251 is a self-adjusting belt tensioner with one pulley and a 3 1/2 in outside diameter. It is designed as an OEM-specified replacement part for vehicle accessory drive systems. The manufacturer part number is 89251, and it is produced by DAYCO.

Where to buy the DAYCO 89251 belt tensioner worldwide?

3G Electric supplies the DAYCO 89251 self-adjusting belt tensioner to customers worldwide. We handle full logistics, customs clearance, and delivery for global orders. Contact our team to source this OEM-specified part for your vehicle's accessory drive system.

How to install the DAYCO 89251 belt tensioner?

Installation of the DAYCO 89251 self-adjusting belt tensioner follows standard automotive practice: relieve belt tension, remove the old tensioner, align the new unit with mounting holes, torque to manufacturer specifications, and route the belt over the pulley. Always consult the vehicle service manual for exact procedures.

Used in

Common applications for DAYCO

Automotive service centers — DAYCO metal exhaust hoses (SKU 4GKA4, 4GKA5) for flexible exhaust extraction from vehicle tailpipes during repair.

Marine engine rooms — DAYCO 304 stainless steel exhaust hoses (SKU 4GKA8, 4GKA7) for venting diesel generator exhaust in confined spaces.

Fuel system maintenance — DAYCO SAE J30R7 fuel hoses (SKU 4GJW1) for replacement of low-pressure fuel lines in industrial engines.

High-temperature fuel injection — DAYCO FKM fuel injection hose (SKU 4GJW6) for return lines on common-rail diesel systems operating above 250°F.

Industrial ventilation — DAYCO metal exhaust kits (SKU 4GKC1) for connecting fume hoods to exhaust ducts in welding or chemical processing areas.

Biofuel handling — DAYCO SAE J1527 fuel hoses (SKU 4GJW3) for transfer of biodiesel blends in agricultural equipment refueling stations.

DAYCO Products

3G Electric supplies DAYCO vehicle self-adjusting belt tensioners. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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