OEM GMC Sierra 3500 Classic Valve Stem Oil Seal

GMC Sierra 3500 Classic Valve Stem Oil Seal Parts Questions & Experts Answers

• Valve Seals
  12482062
  Q: What tools are required to service and repair the valve guide seal, replace the valve stem oil seal, and valve spring on GMC Sierra 3500 Classic?

  A:

  Repairing the Valve Stem Oil Seal and installing new Valve Stem Oil Seal and valve spring needs Spark Plug port adapter (J 22794) and valve spring compressor (J 38606). Start by removing the Rocker Arm and disconnect the Spark Plug wire from the Spark Plug. Turn each plug boot 1/2 turn and pull only on the boot to extract the wire. Start the process only when the engine cools down to room temperature. Slowly turn the Spark Plug one to two rotations while inspecting for debris around it. Insert the Spark Plug port adapter j 22794 into the Spark Plug hole and connect air pipes while applying compressed air to protect the valves. Compress the valve spring using valve spring compressor (J 38606) and then remove valve stem keys (225) before unhurled the valve spring tension by releasing the compressor. Take these parts in this sequence: remove the valve spring cap at position 224, then the valve spring 223, Valve Stem Oil Seal 222, and finally the valve 228. Cover the valve spring seat by cleaning it first before adding oil to the valve guide and installing the Valve Stem Oil Seal. Push each valve (228) into its designated opening while placing Valve Stem Oil Seal (222) and valve spring (223) before fitting valve spring cap (224). Set the valve spring with the valve spring compressor (J 38606) then install valve keys applying grease to keep them in position and make sure they fit completely onto valve stem grooves. Ease the valve spring force while making sure the valve keys stay set in place before removing the compressor tool. After that, gently hit the valve end with a plastic face hammer to make sure the keys settle in. To install the Spark Plug start hand rotating it clockwise while doing up the port patch retainer j 22794. Apply torque of 15 n.m (11 lb ft). Complete the installation by attaching the Spark Plug Wires to their connections at the Ignition Coil and next to the Spark Plug. Verify correct fitting by checking each boot for proper seating and fix any that need adjustment before you put back the Rocker Arm.