OEM 2005 GMC Sierra 3500 Timing Chain

2005 GMC Sierra 3500 Timing Chain Parts and Q&A

• Q: How to replace the timing chain and sprockets on 2005 GMC Sierra 3500?

  A: In order to lift the Timing Chain and the sprockets, you will need to remove the Oil Pump while rotating the Crankshaft in order to achieve the position where the Crankshaft and the camshaft sprockets have their timing markings aligned while not turning the Crankshaft assembly after the Timing Chain has been removed so as not to damage the piston assemblies or valves. Then remove the bolts of the camshaft sprocket and camshaft sprocket and Timing Chain. Being dependent on the j8433 (Two Jaw Puller), jr41816-2 (Crankshaft End Protector), and j41558 (Crankshaft Sprocket Remover), remove the Crankshaft sprocket before removing the Crankshaft sprocket key if needed. If necessary, clean and check the Timing Chain and sprockets. For the installation, it is necessary to put the key into crank shaft keyway and tap it to situate it until ends do not come out. Lay the Crankshaft sprocket onto the front of the Crankshaft, so that the Crankshaft key aligns with the sprocket keyway, and use the j41665 (Crankshaft Balancer and Sprocket Installer) to fully seat the sprocket against the Crankshaft flange. Rotate the Crankshaft sprocket until the alignment mark is at 12 o'clock position, align the camshaft sprocket locating pin to the camshaft sprocket's hole, the teeth of the sprocket engage with the Timing Chain, the alignment marks on the sprockets align correctly in which camshaft sprocket in 6 o'clock, and Crankshaft in 12 o'clock. Mount the camshaft sprocket and the Timing Chain, making sure to move the camshaft or Crankshaft sprocket to align the timing mark. Lastly, install the camshaft sprocket bolts which can be tightened to 35 nm (26 ft. Lbs.), and reinstall the Oil Pump.