Keep your belt drive system running smooth and reliable with the Motorcraft OEM Grooved Idler Pulley (3C3Z-8678-EB). Designed as a direct factory replacement, this genuine Motorcraft pulley delivers the exact fit, proper belt alignment, and long-lasting durability your 2003–2007 Ford 6.0L Powerstroke Diesel depends on.
A worn or failing idler pulley can cause belt noise, misalignment, slipping, and premature belt wear. Replacing it with a true OEM Motorcraft component ensures dependable operation and restores proper tension and tracking for your accessory drive system.
Features & Benefits
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Genuine Motorcraft OEM Part – Factory-quality design and fitment
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Direct Replacement – Installs easily with no modifications required
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Grooved Idler Pulley – Maintains correct belt tracking and alignment
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Reliable, Long-Lasting Performance – Built for durability under diesel demands
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Prevents Belt Noise & Premature Wear – Helps eliminate squealing and vibration
Vehicle Fitment
✅ Fits 2003–2007 Ford 6.0L Powerstroke Diesel
Part Number
Motorcraft OEM: 3C3Z-8678-EB / YS-314
