Valve Components

Fig 1: Valve Components (LKW)

Courtesy of GENERAL MOTORS COMPANY

Valve Components

Callout	Component Name
Preliminary Procedure Using the EN-50717 fixture, EN-50717-10 compressor adapter and the EN-43963 compressor adapter, compress the valve spring. 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 to less than 24.0 mm (0.943 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage. NOTE: Ensure that the valve train components are kept together and identified in order for proper installation in their original position. Remove the valve keys. Slowly release the compression from the valve spring assembly. Remove the retainer. Special Tools EN-43963 Valve Spring Compressor (off car) EN-50717 Valve Spring Compressor EN-50717-10 Valve Spring Compressor Adapters For equivalent regional tools, refer to Special Tools .
1	Valve Stem Key
2	Valve Spring Retainer
3	Valve Spring
4	Valve Stem Oil Seal CAUTION: Do not damage the valve guide. Remove any burrs that have formed at the key groove by chamfering the valve stem with an oil stone or a file. Special Tools EN-46116 Valve Stem Seal Remover/Installer For equivalent regional tools, refer to Special Tools .
5	Exhaust Valve
6	Intake Valve