Removal Procedure
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 390-1136 | Valve Guide Driver Kit | 1 |
| B | 385-8470 | Valve Guide Reamer | 1 |
Start By:
- Remove inlet valves and the exhaust valves.
Note: Refer to Specification UENR0995 "Engine Design" for non-specified engine Torque Values.
| NOTICE |
|---|
Removal and installation of the valve guide and valve seat must be carried out by personnel with the correct training. Also special machinery is required. For more information, refer to your authorized Caterpillar dealer. |
- Remove inlet and exhaust valve seals (1) . Use Tooling (A) in order to remove valve guides (2) from cylinder head (3) .
| Illustration 1 | g02786036 |
| Illustration 2 | g02786037 |
- Repeat the Step 1 for the remaining inlet and exhaust valve guides.
Installation Procedure
- Install inlet and exhaust valve guides (2) in the reverse order of removal.
- Use Tooling (A) to install inlet and exhaust valve guides (2) .
Note: Ensure that the cylinder head is clean and free from machining debris. Clean the parent bores in the cylinder head and lubricate the new valve guides.
| Clearance between Valve Stem and Guide | ||
| Valve Stem and Guide (intake and exhaust) |
New | 0.055 to 0.085 mm (0.0022 to 0.0033 in.) |
| Allowable | 0.055 to 0.10 mm (0.002 to 0.004 in.) |
|
| Valve Guide Replacement | ||
| Valve Guide I.D. (intake and exhaust) |
New | 7.030 to 7.045 mm (0.2768 to 0.2773 in.) |
