Drivremmar

Drivremmar are belts that transfer rotational power from a primary drive shaft, usually the engine crankshaft, to ancillary components such as the alternator, water pump, power steering pump, and air conditioning compressor. They are part of a belt-drive system that uses pulleys and tensioners to maintain grip and proper alignment.

The most common types in automotive use are V-belts, serpentine belts, and poly-V belts. V-belts are an older design, typically used in systems with multiple belts. Serpentine belts are single continuous belts that drive several components via a network of idler pulleys. Poly-V belts are narrower with multiple small ribs that fit into corresponding grooves. In modern cars, the belt driving multiple accessories is usually a single serpentine belt; timing belts, when present, run inside the engine and synchronize camshaft with crankshaft, and are not part of the accessory drive.

Drive belts are made from rubber compounds reinforced with fibers such as polyester, aramid, or fiberglass to provide strength and flexibility. Some designs include heat-resistant materials or coatings to cope with higher temperatures. The belt’s construction, including the number of ribs or grooves, determines its required pulley geometry.

Maintenance involves regular visual inspection for cracks, fraying, glazing, or oil contamination, and checking belt tension. Replacement intervals vary by design and operating environment; automotive belts often range from about 60,000 to 150,000 kilometers, depending on the belt type and vehicle manufacturer. When replacing, it is common to replace the belt together with any tensioner or idler pulleys.

Failure signs include squealing, slipping, loss of charging or of power steering, or engine overheating if a belt drives the water pump. A belt that breaks or becomes severely worn can cause sudden loss of multiple systems and may leave the engine inoperable. Regular inspection helps prevent unexpected failures.