Intake and Exhaust Valve Installation

WARNING: This page is about a different variant/trim than selected.

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
Preliminary Procedure Ensure that the valve train components will be installed in their original position.
1	Intake Valve (Qty: 8) NOTE: Lubricate the valve guides and the valve stems with engine oil.
2	Exhaust Valve (Qty: 8) NOTE: Lubricate the valve guides and the valve stems with engine oil.
3	Valve Stem Oil Seal (Qty: 16) NOTE: Valve stem oil seal sets will contain 2 different colored seals, black and green. The set of 8 seals that are green go on the exhaust valves. Procedure Place the valve stem oil seals onto the guides. NOTE: Always use NEW seals when assembling the cylinder head. Mount a new valve stem oil seal using the EN-46116 remover/installer. NOTE: Force should only be applied to the valve spring contact area of the new valve stem oil seal during installation. Push and twist the valve stem oil seal into position on the valve guide until the seal positively locks on the guide using the EN-46116 remover/installer. Lubricate the valve stem and valve guide ID with clean engine oil. Refer to Adhesives, Fluids, Lubricants, and Sealers . Special Tools EN-46116 Valve Stem Seal Remover/Installer For equivalent regional tools, refer to Special Tools .
4	Valve Springs (Qty: 16)
5	Valve Spring Retainer (Qty: 16)
6	Valve Stem Key - Intake, Exhaust (Qty: 32) WARNING: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury. CAUTION: Do not compress the valve springs less than 25.0 mm (0.984 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage. Procedure Using the EN-8062 compressor and the EN-43963 compressor adapter, compress the valve spring. Install the valve stem keys. Slowly release the tension. Inspect for proper valve key seating. Special Tools EN-8062 Valve Spring Compressor EN-43963 Valve Spring Compressor - Off-Car Adapter For equivalent regional tools, refer to Special Tools .