OEM Chevrolet Suburban 1500 Camshaft

Chevrolet Suburban 1500 Camshaft Parts and Q&A

• Camshaft
  12561721
  Q: How to replace the camshaft on Chevrolet Suburban 1500?

  A:

  Service position hood raising begins with hood hinge bolt removal followed by raising the hood until vertical position then tightening the bolts for service orientation. The following work steps include separating the radiator support and front cover and valve lifters and the Camshaft sensor bolt with sensor. Use a rotating motion on the Crankshaft to line up its marks with those on the Camshaft sprocket. After alignment, unscrew the sprocket bolt. After Timing Chain removal operators should avoid rotating the Crankshaft assembly because this action could cause damage to piston assemblies or valves. First remove the Camshaft sprocket before you relocate the Timing Chain. After this step remove the Camshaft retainer bolts as well as the retainer. The procedure demands careful Camshaft handling because it could damage Camshaft bearings. To extract the Camshaft, insert three m8 1.25 x 100 mm bolts (M8 1.25 x 4.0 inch) into the front bolt holes and use these bolts as handles to pull the Camshaft from the engine block before removing the bolts. Make cleaning and inspection of both the Camshaft components and bearings part of your maintenance process. When installing the Camshaft first apply clean engine oil to the journal and bearing surfaces before installing the Camshaft with these three bolts serving as handles but remove them after installation. Place the retainer plate so its gasket points toward the engine block. Clean the gasket surface before placing the plate. Then set the Camshaft retainer with its bolts and tighten them at a torque of 25 nm (18 ft. Lbs.). To continue with installation place the Camshaft sprocket then position the Timing Chain before tightening the Camshaft sprocket bolts to 35 nm (26 ft. Lbs.). Check the o-ring seal of the Camshaft sensor for any damage; clean engine oil must be applied to the Camshaft sensor prior to installation of the sensor along with its bolt while torque is set to 25 nm (18 ft. Lbs.). The next step involves the installation of valve lifters and then front cover and radiator support. The final step involves removing the hood hinge bolts from their service location before dropping the hood into its normal position followed by bolting and torquing the hinges to 25 nm (18 ft. Lbs.).