Belt Tensioner - Dynamic

Belt Tensioner - Dynamic

The automatic belt tensioner can be checked dynamically as follows:
1. With the engine running, observe belt tensioner movement, The tensioner should move (respond) when the air conditioning clutch cycles (if equipped), or when the engine is accelerated rapidly. If the tensioner movement is constant without air conditioning clutch cycling or engine acceleration, a pulley or shaft is probably bent, or a pulley is out of round. Excessive belt rideout (uneven depth of grooves in the belt) can cause excessive tensioner movement. Check condition by installing a new belt.
2. With the engine off, check routing of the belt.
3. Inspect the belt tensioner wear indicator to confirm the belt is within operating range. Install a new belt if necessary.
4. Rotate the belt tensioner and check for a binding or seized condition. Install a new tensioner if necessary.