REPAIR INSTRUCTIONS, PART 1
Page 255
4. Current Design Valve Stem Seal
Following valve stem-to-guide and valve
stem-to-seal lip lubrication, install the
current-production valve stem seals using
valve seal installer J 45730.
It is essential that the valve stem seal
installation tool, J 45730, be used to install
the seals. This tool ensures that the seal
installs over the guide and to the proper
depth on the valve guide.
When installing valve seals, it is essential that the
proper valve seal installation tool (J 45730) be
used. This tool bottoms on the cylinder head
rocker arm mounting bracket surface when the
seal is installed to the proper depth on the valve
guide. Using any non-bottoming type seal driver
(such as a socket) may result in distorting the top
surface of the seal casing which permanently
distorts the seal lip and prevents proper sealing. It
can also result in the top rubber portion of the
seal being cut off.
280
Figure 280 — Valve Stem Seal
5. Check the valve stem tip for nicks or burrs
that may damage the valve stem seal upon
installation.
6. Install the valve and either install the bottom
rotator or the hardened spring washer if
tip-end rotators are used. Place the valve
springs over the valve stem and onto either
valve rotator or hardened spring washers.
Intake valves use a single outer spring and
the exhaust valves use a combination of
inner and outer springs.
Current-production exhaust location inner springs
are now being painted white. These springs are
completely interchangeable with the former bare
steel springs. The white paint was added to help
verify that the inner spring is present after the
cylinder head is built-up.
1. Steel Retainer Band
2. Multi-Lip Section
3. Primary Lip
4. Valve Guide
5. Three Sharp Edges
5-111.bk Page 255 Monday, July 10, 2006 2:26 PM
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