A belt tensioner is a device that applies a predetermined amount of tension to the engine's accessory drive belt (serpentine belt). Its primary function is to maintain constant, optimal tension on the belt as it wears and stretches over time. This prevents the belt from slipping, squealing, or throwing off, ensuring that critical components like the alternator, water pump, and A/C compressor operate reliably. This belt tensioner 5662763 is engineered for maximum durability and precise fitment in ISZ14 QSZ14 engines. Manufactured to meet or exceed OEM standards, it ensures optimal engine performance and a long service life under heavy-duty conditions.

Whether for full engine rebuilds or quick replacements, DDP Engine provides you with the most reliable parts at unbeatable wholesale prices.

Parameter Details
Product Name: Belt Tensioner
Part Number: 5664883 5664884

Condition: Brand New / High-Quality OEM / Aftermarket
Warranty: 6 Months / 1 Year
Engine Model: ISZ14 QSZ14

Application:

ISZ14 (e.g., Z14NS6B series): Primarily used for long-haul logistics, heavy-duty traction, and engineering transportation in heavy-duty trucks. Common power outputs are 480–630 horsepower, paired with 10–16 speed transmissions, emphasizing high thermal efficiency and low fuel consumption.

QSZ14: More commonly used in construction machinery (e.g., excavators, bulldozers), marine propulsion, generator sets, and some special-purpose vehicles. While there are 14L displacement and China VI emission standard versions (e.g., QSZ14-C560), it is rarely used in mainstream highway heavy-duty trucks, focusing more on stationary or off-road conditions.

Why Choose DDP Engine:
100% Quality Guaranteed: All parts undergo rigorous testing to ensure perfect compatibility and premium performance.
Fast Worldwide Shipping: Large inventory in stock. Orders are typically processed within 3-7 working days with reliable global express and Transportation.
Professional Technical Support: Unsure about the part number? Contact our engineering team for exact cross-reference matching.
Flexible Solutions: Providing Genuine, OEM, and premium Aftermarket spare parts to fit your budget.