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Serpentine belt (foreground) and dual vee belt (background) on a bus engine Belt tensioner providing pressure against the back of a serpentine belt in an automobile engine. A serpentine belt (or drive belt [1]) is a single, continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, air conditioning compressor, air ...
Belt replacement is an obvious solution, and eventually the mandatory one (because no belt lasts forever). Often, though, before the replacement option is executed, retensioning (via pulley centerline adjustment) or dressing (with any of various coatings) may be successful to extend the belt's lifespan and postpone replacement.
The main disadvantage is that belts wear over time, therefore belt replacement is recommended at specific intervals. [ 5 ] [ 6 ] Replacement of the engine's water pump at the same time is often recommended, since the water pump is also subject to wear and easily accessed during the replacement of the timing belt.
My immediate reaction after reading this: "if a single belt breaks, such as the alternator belt, the driver may not realize that there is a problem before the engine becomes damaged." This particular instance is not really a good example since a broken alternator belt will NOT damage the engine, merely drain the battery (by no longer charging it).
From 1987 onwards, the LB4's output was 160 hp (119 kW) for pickups, while full-size vans were rated at 150 hp (112 kW). In 1988, the S-10/S-15 trucks, S-10 Blazer, and S-15 Jimmy had the LB4 4.3 L (262 cu in) as an available option (the accessory drive was upgraded to a serpentine belt drive), which later replaced the 2.8L as the base V6.
A single belt (serpentine belt) accessory drive was introduced on the L05, the 5.0L L03, and the 4.3L V6 LB4 engines used in the 1988 GMT400 models, but not on the older R/V models (R/V models received the serpentine belt drive in 1989 when the front grille was facelifted in appearance to the GMT400 lineup).