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DAYCO 89304 Self-Adjusting Belt Tensioner, 1 Pulley, 3 1/4 in Outside Dia - Vehicle Self-Adjusting Belt Tensioners
DAYCOVehicle Self-Adjusting Belt Tensioners

DAYCO 89304 Self-Adjusting Belt Tensioner, 1 Pulley, 3 1/4 in Outside Dia

The DAYCO Self-Adjusting Belt Tensioner (part number 89304) is a vehicle belt tensioner with one pulley and an outside diameter of 3 1/4 inches. As an OEM-branded component, it is designed for self-adjusting…

SKU 3G-OTH-486389

Brand
DAYCO
Item
89304 Self-Adjusting Belt Tensioner, 1 Pulley, 3 1/4 in Outside Dia
Category
Vehicle Self-Adjusting Belt Tensioners
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

DAYCO
Manufacturer Part Number
89304
Type
89304
Pulleys
1
Outside Dia
3 1/4 in

Technical Documents

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DAYCO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The DAYCO Self-Adjusting Belt Tensioner (part number 89304) is a vehicle belt tensioner with one pulley and an outside diameter of 3 1/4 inches. As an OEM-branded component, it is designed for self-adjusting operation in automotive belt drive systems.

Frequently Asked Questions

What is the DAYCO 89304 belt tensioner used for?

The DAYCO 89304 self-adjusting belt tensioner maintains proper tension in automotive serpentine or accessory belt drive systems. It automatically compensates for belt stretch and wear, ensuring reliable operation of alternators, water pumps, and other engine-driven components.

What are the specifications of the DAYCO 89304 belt tensioner?

The DAYCO 89304 is a self-adjusting belt tensioner with one pulley and an outside diameter of 3 1/4 inches. It is an OEM-branded component designed for vehicle belt drive systems. The manufacturer part number is 89304.

Where to buy the DAYCO 89304 belt tensioner worldwide?

3G Electric supplies the DAYCO 89304 self-adjusting belt tensioner to customers worldwide. We handle full logistics, customs clearance, and delivery to your location. Contact us for pricing and lead time on this OEM-branded component.

How to install the DAYCO 89304 belt tensioner?

Installation of the DAYCO 89304 self-adjusting belt tensioner typically involves removing the old tensioner, aligning the new unit with the mounting bracket, and torquing the bolts to manufacturer specifications. Always consult the vehicle service manual for exact procedures and safety precautions.

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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Compatible alternatives & equivalents

Cross-referenced by specification & description
The DAYCO 89251 is a self-adjusting belt tensioner with one pulley and a 3 1/2 in outside diameter. It is used in automotive accessory drive systems to maintain proper belt tension for components such as alternators and water pumps
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The DAYCO 89251 is a self-adjusting belt tensioner with one pulley and a 3 1/2 in outside diameter. It is used in automotive accessory drive systems to maintain proper belt tension for components such as alternators and water pumps
The DAYCO 89204 self-adjusting belt tensioner automatically maintains proper tension on serpentine or accessory drive belts in automotive engines. It features one pulley with a 3 1/2 in outside diameter. This component is used in vehicle maintenance and repair to prevent belt slippage and reduce noise
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The DAYCO 89204 self-adjusting belt tensioner automatically maintains proper tension on serpentine or accessory drive belts in automotive engines. It features one pulley with a 3 1/2 in outside diameter. This component is used in vehicle maintenance and repair to prevent belt slippage and reduce noise
Steel ribbed idler pulley for serpentine belt systems. Compatible with 8PK belt trade size. Light-duty performance rating. Used to maintain belt tension and routing in vehicle accessory drive systems
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Steel ribbed idler pulley for serpentine belt systems. Compatible with 8PK belt trade size. Light-duty performance rating. Used to maintain belt tension and routing in vehicle accessory drive systems
Timing belt and metric V-belt belt with 905 mm effective length and fiberglass reinforcing cord. Designed for automotive drive applications to synchronize engine camshaft and crankshaft rotation
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Timing belt and metric V-belt belt with 905 mm effective length and fiberglass reinforcing cord. Designed for automotive drive applications to synchronize engine camshaft and crankshaft rotation
Timing belt for synchronizing engine camshaft and crankshaft rotation. Effective length 1200 mm, fiberglass reinforcing cord. 0 ribs, metric V-belt type
DAYCO
Timing belt for synchronizing engine camshaft and crankshaft rotation. Effective length 1200 mm, fiberglass reinforcing cord. 0 ribs, metric V-belt type
Timing belt and metric V-belt belt with 1,048 mm effective length, 0 ribs, and fiberglass reinforcing cord material. Used in automotive engines to synchronize camshaft and crankshaft rotation, as well as in industrial machinery for precise timing and power transmission
DAYCO
Timing belt and metric V-belt belt with 1,048 mm effective length, 0 ribs, and fiberglass reinforcing cord material. Used in automotive engines to synchronize camshaft and crankshaft rotation, as well as in industrial machinery for precise timing and power transmission

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The DAYCO 89474 is a heavy-duty self-adjusting belt tensioner with one pulley. It maintains proper tension on engine accessory drive belts, preventing slippage and extending belt life. Suitable for use in heavy-duty vehicle engine accessory drive systems
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The DAYCO 89419 is a heavy-duty self-adjusting belt tensioner with a single pulley. It is designed to maintain proper tension in vehicle accessory belt systems, reducing belt wear and ensuring reliable drive belt performance in demanding applications
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Self-adjusting belt tensioner with one pulley, 3 in outside diameter. Maintains proper tension in automotive serpentine or accessory belt drive systems, automatically compensating for belt stretch and wear
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Self-adjusting belt tensioner with one pulley, 3 in outside diameter. Maintains proper tension in automotive serpentine or accessory belt drive systems, automatically compensating for belt stretch and wear
The DAYCO 89228 self-adjusting belt tensioner maintains proper tension in automotive accessory drive systems. It features a single pulley with a 3-1/2 in outside diameter. This tensioner is used to prevent belt slippage and wear on engine-driven components such as alternators and water pumps
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The DAYCO 89228 self-adjusting belt tensioner maintains proper tension in automotive accessory drive systems. It features a single pulley with a 3-1/2 in outside diameter. This tensioner is used to prevent belt slippage and wear on engine-driven components such as alternators and water pumps
Self-adjusting belt tensioner with 1 pulley, 2 3/4 in outside diameter. Automatically maintains proper tension on engine accessory drive belts to prevent slippage and reduce wear. Suitable for automotive and light-truck applications
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Self-adjusting belt tensioner for vehicle accessory drive systems. Maintains proper belt tension automatically to reduce slippage and wear. Single pulley design with 2 3/4 in outside diameter
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Self-adjusting belt tensioner for vehicle accessory drive systems. Maintains proper belt tension automatically to reduce slippage and wear. Single pulley design with 2 3/4 in outside diameter
Self-adjusting belt tensioner with one pulley, 2 3/4 in outside diameter. Maintains proper tension on serpentine or accessory drive belts, automatically compensating for belt stretch and wear
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Self-adjusting belt tensioner with one pulley, 2 3/4 in outside diameter. Maintains proper tension on serpentine or accessory drive belts, automatically compensating for belt stretch and wear
Self-adjusting belt tensioner with one pulley, 2 1/2 in outside diameter. Automatically maintains proper tension on engine accessory belts to prevent slippage and wear. Suitable for automotive and light-truck accessory belt systems
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Self-adjusting belt tensioner with one pulley, 2 1/2 in outside diameter. Automatically maintains proper tension on engine accessory belts to prevent slippage and wear. Suitable for automotive and light-truck accessory belt systems