OEM Chevrolet Silverado 3500 Camshaft

Chevrolet Silverado 3500 Camshaft Parts Questions & Experts Answers

• Camshaft
  12561721
  Q: How to replace the camshaft on Chevrolet Silverado 3500?

  A:

  First, lift the hood to service position and remove the hood hinge-bolts, raise the hood until vertical, and tighten the hinge bolts when the hood is in the service position. Then extract the radiator support, front cover, valve lifters, and the bolt, and sensor for the Camshaft sensor. Take off the Camshaft sprocket bolts after rotating the Crankshaft till the timing marks on the crank and the Camshaft sprockets coincide. Do not turn the Crankshaft assembly once you are through with the cutting of the Timing Chain and avoid damage of the piston assemblies or valves, then you remove the Camshaft sprocket and place the Timing Chain back. Remove the Camshaft retainer bolts and retainer carefully not to harm the Camshaft bearings because all the Camshaft journals are of the same diameter. Mount three m8-1.25 x 100mm (M8-1.25 x 4.0 inch) bolts into front bolt holes of the Camshaft and use them as a handle to pull the Camshaft out of the engine block, taking care to remove the bolts after. If required, clean and inspect the Camshaft and bearings. For installation, lubricate the Camshaft journals and bearings with clean engine oil, then replace again the bolts to cautiously install the Camshaft into the engine block and remove the bolts. Make sure the retainer plate is fitted from the side of the sealing gasket against the engine block, and keep the surface of the gasket clean and then fitting the Camshaft retainer and the bolt with tightened at 25 nm (18 ft. Lbs.). Following that, fit the Camshaft sprocket, arrange the Timing Chain, then the Camshaft sprocket bolts, which must be tightened to 35 nm (26 ft. Lbs.). Check for damaged Camshaft sensor o-ring seal; if it is intact, drip oil and clean engine at it and install Camshaft sensor and bolt, tighten it at 25 nm (18 ft. Lbs). Mount the valve lifters, then use the radiator support. Lastly, remove the hood hinge bolts from the service position, lower the hood to the normal position and replace the hood hinge bolts torquing to 25 nm (18 ft. Lbs.).