Dayco 89502 Idler/Tensioner Pulley

Q: Is the idle pulley and tension pulley the exact same pulley on a 2010 5.7 tundra?

No. They are two different things. The tension pulley sits a bit lower in the engine bay than the idler pulley. For the tension pulley you need to order the Dayco 89378 Belt Tensioner Assembly.

Product ID: 391053351

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🔥High-temp sealed lubricated bearings

⚙️Precision CAD & FEA engineered

🛡️Durable against dirt, salt & chemicals

Frequently Bought Together

Dayco 89502 Idler/Tensioner Pulley

Dayco 89378 Belt Tensioner

Dayco Drive Rite 5080950DR Serpentine Belt

Description

⚙️ Drive with confidence, powered by precision engineering.

TRUSTED LEGACY SINCE 1905 - Dayco’s global reputation means you’re investing in proven quality and cutting-edge automotive technology.
BUILT TO BRAVE THE ELEMENTS - Superior resistance to dirt, salt, and chemicals keeps your engine running cleaner and quieter.
VIBRATION REDUCING INNOVATION - Glass-filled polymer and spun steel construction deliver smoother surfaces and tighter tolerances to extend belt life.
ENGINEERED FOR PEAK PERFORMANCE - State-of-the-art CAD and FEA design ensures maximum structural integrity and longevity.
SEALED BEARINGS FOR RELIABILITY - High-temperature seals and lubricated bearings guarantee consistent, noise-free operation under pressure.

The Dayco 89502 Idler/Tensioner Pulley is a premium replacement part engineered with advanced CAD and FEA technology. Featuring durable spun steel and glass-filled polymer construction, it reduces vibrations and extends belt life. Equipped with high-temperature sealed lubricated bearings, it offers reliable, quiet performance while resisting dirt, salt, and chemicals. Trusted globally since 1905, Dayco delivers unmatched quality for your engine’s accessory drive system.

Specifications

Manufacturer	Dayco
Brand	Dayco
Model	Tensioner Pulley
Product Dimensions	13.46 x 13.46 x 4.32 cm; 453.59 g
Item model number	89502
Manufacturer Part Number	89502
Position	Center
Item Weight	454 g

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Is the idle pulley and tension pulley the exact same pulley on a 2010 5.7 tundra?

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