1. Squealing or chirping noise from the engine: A loose or worn belt tensioner can cause the serpentine belt to slip, which can produce a squealing or chirping noise.
2. Visible cracks or damage to the belt tensioner: If the belt tensioner is cracked, damaged, or has excessive wear, it may not be able to properly tension the serpentine belt, leading to slipping and potential engine problems.
3. Difficulty with starting the engine: A faulty belt tensioner can cause the serpentine belt to become loose, which can prevent the engine from starting properly.
4. Overheating engine: If the serpentine belt is not properly tensioned, it can cause the water pump to not function properly, leading to an overheating engine.
5. Check engine light: In some cases, a malfunctioning belt tensioner may trigger the check engine light to come on.
It is important to note that these signs may also indicate other problems with your vehicle. If you suspect your belt tensioner may need to be replaced, have your vehicle inspected by a qualified mechanic to confirm the diagnosis and perform the necessary repairs.
