Valve Components

WARNING: This page is about a different car, the 2015 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Valve Components (LKW)

GM2963991

Courtesy of GENERAL MOTORS COMPANY

Valve Components

Callout	Component Name
Preliminary Procedures Inspect the valves and the valve seats. Refer to Valve and Seat Grinding . Inspect the valve springs for the following conditions: Expanded height Unparallel spring ends Spring tension using EN-9666 tester Any distorted springs should be replaced Special Tools EN-9666 Valve Spring TesterFor equivalent regional tools, refer to Special Tools .
1	Intake Valve
2	Exhaust Valve
3	Valve Stem Oil Seal NOTE: Always use NEW valve stem oil seals when assembling the cylinder head. Fully seat the seals on the valve guides.
4	Valve Spring
5	Valve Spring Retainer
6	Valve Stem Key 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. Procedure With the retainer installed, use EN-50717 fixture, EN-50717-10 compressor adapter and EN-43963 compressor adapter to compress the valve spring. Install the valve stem key. Slowly release the compression from the valve/spring assembly. Inspect for proper valve key seating. 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 .