ACDelco Water Pump and Alternator Belt Tensioner Assembly

The ACDelco Water Pump and Alternator Belt Tensioner Assembly line gives you a drive belt tensioner (also called a serpentine belt tensioner or automatic belt tensioner) that works with the engine's accessory drive system. It keeps the belt under steady tension so the water pump, alternator and other accessories turn reliably.

Key Features:

• Maintains correct drive belt tension to help reduce belt slip, squeal and premature belt wear
• Supports reliable water pump and alternator operation for engine cooling and charging system performance
• Assembly design replaces the tensioner as a complete unit, which simplifies installation
• Engineered by ACDelco, the GM parts brand known for OE-quality replacement components
• Built for durability under the heat, vibration and constant load of daily driving

A worn tensioner can cause belt noise, accessory problems and overheating. Replacing it with an ACDelco tensioner assembly helps restore accessory drive performance. Replacing the drive belt at the same time is a good practice.