Workshop Manual

EPA07/10 DD PLATFORM WORKSHOP MANUAL - ENGINE

14.14 INSTALLATION OF VALVE, SPRING, SEAL AND VA LVE CAP

Install a s 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 i nstalling the new seal.

NOTICE:

Ensure all valve spring seats h ave been installed before the

valve stem o il 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 d amaging 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.