1. Timing Belt Tensioner: The tensioner maintains the proper tension on the timing belt. Over time, it can wear out or fail, leading to belt slipping or breakage. Replacing it along with the timing belt ensures proper tension and longevity.
2. Timing Belt Idler Pulley: The idler pulley helps guide and support the timing belt. It can develop bearing issues or become misaligned over time, causing the belt to run unevenly. Replacing it reduces the risk of belt damage and ensures smooth operation.
3. Water Pump: In many Nissan Xterra models, the timing belt drives the water pump. If the water pump fails or develops leaks, it can cause overheating issues, coolant loss, and potentially lead to engine damage. Replacing it alongside the timing belt is a proactive measure to avoid future water pump problems.
4. Crankshaft Seal and Camshaft Seals: These seals prevent oil leaks from the crankshaft and camshaft. They can deteriorate with age and mileage, causing oil leaks. Replacing them while the timing belt is off provides easy access and helps prevent future oil leaks.
5. Spark Plugs: If the spark plugs are due for replacement based on your vehicle's maintenance schedule or mileage, it's convenient to replace them when the timing belt is off. Worn spark plugs can affect engine performance and fuel efficiency.
6. Valve Cover Gasket: Replacing the valve cover gasket when changing the timing belt can prevent or address potential oil leaks from the valve cover area.
7. Coolant: Replacing the coolant (antifreeze) is typically recommended every few years or following manufacturer guidelines. Doing it while performing the timing belt service ensures proper cooling system maintenance and protection.
Remember that the specific parts to be replaced may vary depending on your Nissan Xterra's model year and engine type. It's best to consult your vehicle's owner's manual or a qualified mechanic to confirm the recommended replacement components during a timing belt service.
