EPA07/10 DD PLATFORM WORKSHOP MANUAL - ENGINE
14.14 INSTALLATION OF VALVE, SPRING, SEAL AND VALVE CAP
Install as follows:
1. Position the cylinder head on a work bench for valve installation, if removed. Lubricate
the valve stems with clean engine lubricating oil and slide them into their respective valve
guides and against the valve seats. If reusing valves, install them to their original positions.
NOTE:
Clean valve guide of old seal material and oil before installing the new seal.
NOTICE:
Ensure all valve spring seats have been installed before the
valve stem oil seal is installed.
2. Install the valve spring seat over the valve guide.
3. With the valve installed into the cylinder head, clean the valve guide and valve stem
with brake cleaner.
4. Install the protective cap over the valve stem.
NOTE:
Do not coat valve stem or seal with oil prior to installation.
5. Install the valve stem seal over the protective cap.
6. Push the seal down on the valve stem using the seal installer (J–47490). When the installer
tool contacts the cylinder head, the seal is correctly positioned. Be sure the installer is
square against the cylinder head. Remove the seal installer and protector cap.
7. Install the valve spring and retainer. If reusing parts, install them to their original positions.
NOTE:
Always install new valve stem locks when installing valves.
8. Using the valve spring compressor tool (J–47406), compress the valve spring only as
much as required to install the valve locks. After installing the valve locks, rap the end of
the valve stem sharply with a plastic mallet to seat the valve locks.
NOTICE:
Be sure the valve retainer is properly centered and aligned to
avoid scoring the valve stem. Do not compress the spring any
more than necessary to install the locks, to avoid damaging the
oil seal.
9. Remove Compression test adaptor J-47411.
10. On the other three valves it may be necessary to repeat these steps for cylinders being
worked on.
All information subject to change without notice.
DDC-SVC-MAN-0081 2010
Copyright © 2010 DETROIT DIESEL CORPORATION
14-29
Summary of Contents for EPA07
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