Sierra 1500 4WD V6-4.3L (2008)
5. Using the J 42073 , install the valve stem oil seal onto the valve guide.
1. Tap the valve stem oil seal onto the valve guide until the J 42073 bottoms against the valve spring seat.
2. Inspect the valve stem oil seal. The valve stem oil seal should not be bottomed against the valve guide.
There should be a 1-2 mm (0.03937-0.07874 in) gap between the bottom edge of the valve stem oil seal and the valve guide.
6. Install the valve spring (3).
7. Install the valve spring cap (2) onto the valve spring (3), over the valve stem.
Caution: 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.
8. Use the J 5892-D in order to compress the valve spring.
Hook the slotted end of J 5892-D under the washer on the valve rocker arm bolt.
9. Apply steady pressure on the valve spring cap until the valve keys are accessible.
