OEM GMC Sierra 3500 Rocker Shaft Spring Kit

GMC Sierra 3500 Rocker Shaft Spring Kit Parts Questions & Experts Answers

• Valve Springs
  98025825
  Q: How to replace the Rocker Shaft Spring Kit and valve stem oil seal on GMC Sierra 3500?

  A: Before beginning Valve Stem Oil Seal and valve spring replacement it's essential to remove the valve Rocker Arms and pushrods while positioning the Piston in the serviced cylinder at its lowest point to stop engine rotation when compressed air is applied. First close both valves through Crankshaft rotation then you may remove the Spark Plug from the cylinder. The Spark Plug port adapter (J 22794) should be installed within the Spark Plug hole before applying compressed air through the adapter to keep the valves sealed. Use the valve spring compressor j 5892-d to install on the Cylinder Head while securing it with the valve Rocker Arm nut. Tap the valve spring cap lightly to free the valve stem keys before installation. The valve spring compressor j 5892-d compresses the spring while you remove the keys from the valve stems. Avoid releasing compressed air to stop the valve from dropping into the cylinder bore. After removing the valve spring compressor (J 5892-D) from the Cylinder Head proceed by taking out the valve spring cap and valve spring in succession. The oil seal on the valve stem needs removal. Cleaning engine oil should be applied as a lubricant to the valve stem before installation and the outside diameter of the valve guide seal and rotators also need lubrication. The valve stem seal installer (J 43105) enables installation of valve stem oil seals from the valve tip to the valve guide through gentle tapping until complete seating occurs. Set the valve spring into place with small-end up and position the valve spring cap after. Position the valve spring compressor (J 5892-D) to squeeze the spring again before you install the valve stem keys for which you should apply clean grease. Using the valve spring compressor (J 5892-D) compress the valve spring before removing the tool. Drain compressed air from the cylinder and take away the compressor. To complete the replacement process first install the Spark Plug then reconnect both valve rocker arms and pushrods.