Engine Noise
- Check for loose or worn drive belts.
- Check oil level.
- Check intake air system. See TEST HU in SELF-DIAGNOSTICS - VILLAGER article.
- Check EVAP system. See TEST HX in SELF-DIAGNOSTICS - VILLAGER article.
- Check secondary injection system. See TEST JB in SELF-DIAGNOSTICS - VILLAGER article.
- Check EGR system. See TEST HE in SELF-DIAGNOSTICS - VILLAGER article.
- Check engine compression and engine mechanical condition. Check camshaft and valves.
- Check for loose components.
- Check for loose spark plugs.
- Check for cooling system leaks.
- Check exhaust system. See TEST HF in SELF-DIAGNOSTICS - VILLAGER article.
- Check for worn connecting rod bearings, worn main bearings, loose piston pins, or excessive piston to cylinder bore clearance.
- Check for detonation (spark knock).