F 150 4WD Pickup V8-5.4L CNG VIN M (2001)
5. Remove the (A) valve spring retainer keys, the (B) valve spring retainers, and the (C) valve spring.
Installation
1. Position the valve spring and the valve spring retainers.
2. Install the Valve Spring Compressor Spacer between the valve spring coils to prevent valve stem seal damage.
3. Use the Valve Spring Compressor to compress the valve spring. Install the valve spring retainer keys.
4. Install the camshaft roller followers.
5. Install the spark plug.
