3914086 3973827 3978022 3937553 3936201 3934818 3922900 3918406 9405-00360 3917485

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 3914086 3973827 3978022 3937553 3936201 3934818 3922900 3918406 9405-00360 3917485 5333477 3967188 is engineered for maximum durability and precise fitment in 6ISBe 6ISDe 4BT 6BT CGe250 CGe280 Engine. 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: 3914086 3973827 3978022 3937553 3936201 3934818 3922900 3918406 9405-00360 3917485 5333477 3967188 

Condition: Brand New / High-Quality OEM / Aftermarket
Warranty: 6 Months / 1 Year
Engine Model: 6ISBe 6ISDe 4BT 6BT CGe250 CGe280

Application:

6ISBe: Inline six-cylinder, electronically controlled high-pressure common rail engine (e.g., ISBe 4.5L/5.9L/6.7L), used in medium and heavy-duty trucks, buses, light commercial vehicles, and off-highway machinery (e.g., forklifts, generator sets), commonly found in China III to China IV emission standards (e.g., 250–300 hp models).

6ISDe: Inline six-cylinder, electronically controlled China VI emission standard upgraded version (e.g., ISDe 4.5L/6.7L), primarily for urban logistics, light and medium-duty trucks, municipal vehicles, and refrigerated trucks, balancing power and low emissions (typical 180–250 hp).

4BT: Inline four-cylinder, mechanically turbocharged (3.9L), used in light trucks, pickups, small construction vehicles, and generators, emphasizing economy and durability (approximately 120–160 hp). 6BT: Inline six-cylinder, mechanically turbocharged (3.9L), used in medium-duty trucks, school buses, light passenger vehicles, off-road vehicles, and construction machinery, with higher torque than the 4BT (approximately 160–210 horsepower).

CGe250 / CGe280: Belongs to the C series (8.3L), inline six-cylinder, mechanically/electronically fuel-injected ("CGe" often refers to C-Gas or C-series electronic fuel injection version), used in light/medium-duty trucks, school buses, motorhomes, fire trucks, and marine auxiliary power. 250–280 horsepower versions were more common in early 2000s models (not currently mainstream).

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