3947574 5297374 5096958AA 05096858AA Engine Drive Belt Idler Tensioner Pulley For QSB6.7 ISB6.7

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 3947574 5297374 5096958AA 05096858AA is engineered for maximum durability and precise fitment in QSB6.7 ISB6.7engines. 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: 3947574 5297374 5096958AA 05096858AA

Condition: Brand New / High-Quality OEM / Aftermarket
Warranty: 6 Months / 1 Year
Engine Model: QSB6.7 ISB6.7

Application:

ISB6.7 (Electrically controlled upgraded version of B-series, 6.7L): Used since 2007 in medium and heavy-duty trucks, city buses/municipal vehicles, and overseas Ram 2500–5500 heavy-duty trucks (2007–2019 models). Meets China IV–China VI standards (aftertreatment includes SCR/EGR), power 185–300 horsepower, a mainstay of highway transportation.

QSB6.7 (C-series construction machinery dedicated, 6.7L): Designed specifically for construction machinery (such as PC240-8 excavators, loaders, road rollers), off-highway vehicles, power 130–260 hp (99–194 kW), high-pressure common rail, fast response, adaptable to varying loads, often labeled "QSB6.7-Cxxx" (e.g., C170, C260).

Why Choose DDP Engine:
100% Quality Guaranteed: All parts undergo rigorous testing to ensure perfect compatibility and premium performance.
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Flexible Solutions: Providing Genuine, OEM, and premium Aftermarket spare parts to fit your budget.