- Worn hydraulic tappet lifters can cause a variety of noises, including:
>* A ticking or clicking sound from the engine
>* A tapping sound from the engine
>* A knocking sound from the engine
- The noise may be more noticeable at idle or when the engine is cold.
2. Engine Performance
- Worn hydraulic tappet lifters can also affect engine performance, causing:
>* Reduced power
>* Increased fuel consumption
>* Rough idling
>* Stalling
3. Oil Pressure
- Worn hydraulic tappet lifters can also cause a drop in oil pressure. This is because the lifters rely on oil pressure to function properly. If the oil pressure is too low, the lifters will not be able to move properly and will eventually wear out.
4. Visual Inspection
- If you suspect that your hydraulic tappet lifters are worn, you can remove the valve cover and inspect them. Worn lifters will typically show signs of wear, such as:
>* Scoring or pitting on the surface
>* Cracks or chips
>* Discoloration
5. Compression Test
- A compression test can also be used to diagnose worn hydraulic tappet lifters. A compression test measures the amount of pressure in each cylinder. If the pressure is too low, it could be a sign of worn lifters.
