Genuine Nissan Altima Variable Timing Sprocket

Nissan Altima Variable Timing Sprocket Parts Questions & Answers

• Sprocket-Camshaft
  13024-EA000
  Q: How do you service the Timing Chain and Timing Sprocket to avoid engine damage on Nissan Altima?

  A: Caution is advised as the timing system is complex, and mistakes can lead to severe engine damage; only highly experienced individuals should attempt this procedure, and if unsure, consulting an expert is recommended. It is generally easier to remove the engine for this procedure, although servicing the timing chain assembly can be done with the engine in the vehicle. Begin by relieving the fuel system pressure, positioning the engine at TDC for cylinder number one, and disconnecting the negative battery cable. Remove the coolant reservoir, alternator and bracket, and valve cover, then support the engine from above. Proceed to remove the Oil Pan and strainer, disconnect the electrical connector for the IVT control solenoid, and remove the bolts retaining the IVT/camshaft sprocket cover. Use a sharp tool to cut the RTV sealant and remove the upper chain guide, ensuring the camshaft sprockets are aligned at TDC number 1. Remove the crankshaft pulley without allowing it to turn, then take off the timing chain cover, tensioner, and timing chain. If the chain is being removed for camshaft or cylinder head work, skip the remaining steps. Inspect the camshaft, idler, and crankshaft sprockets for wear, as well as the chains and chain guides. For installation, use new bolts for the balance shaft unit and ensure proper alignment of the balance shaft chain with the crankshaft sprocket. Install the timing chain, guides, and tensioner, checking alignment marks throughout the process. Apply RTV sealant to the timing chain cover and IVT/camshaft sprocket cover before reinstalling them, tightening bolts in the correct sequence. Finally, rotate the crankshaft by hand through at least two full revolutions to check for any resistance, indicating potential issues, and reconnect the battery to perform necessary re-learn procedures.