4936437 4987968 4892356 3978324 5260382 4936439 Engine V-ribbed Belt Tensioner Pulley For ISBe185 4ISBe 6ISBe

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 4936437 4987968 4892356 3978324 5260382 4936439 is engineered for maximum durability and precise fitment in ISBe185 4ISBe 6ISBe 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: 4936437 4987968 4892356 3978324 5260382 4936439  

Condition: Brand New / High-Quality OEM / Aftermarket
Warranty: 6 Months / 1 Year
Engine Model: ISBe185 4ISBe 6ISBe

Application:

ISBe185 (usually referring to the 185 hp version of 4ISBe or 6ISBe): 4ISBe (4-cylinder, 4.5L) is mostly used in light and medium-duty trucks, buses, RVs, and construction vehicles; 6ISBe (6-cylinder, 5.9L) is commonly found in medium and heavy-duty trucks, tractors, or high-load commercial vehicles. Both are electronically controlled high-pressure common rail engines, meeting China III/China IV emission standards, and are no longer eligible for registration in China. They are mostly used for export or off-highway equipment.

4ISBe (inline four-cylinder, approximately 3.9L–4.5L): Emphasizing lightweight design and fast response, suitable for light trucks, municipal vehicles, minibuses, pickup trucks, and low-power construction machinery.

6ISBe (inline six-cylinder, 5.9L–6.7L): Emphasizing torque and continuous power output, used in medium and heavy trucks, tractors, school buses, large buses and mining/port machinery; 6.7L is mostly China IV 6ISBe+ (such as ISBE4+ 205/250).

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