Valve Guides
WARNING: This page is about a different car, the 2003 Dodge Dakota. However, it is still accessible from the selected car via links, so may be relevant.
Measure valve stems for wear. If wear exceeds 0.051 mm (0.002 in.), replace the valve.
Measure valve stem guide clearance as follows:
- Install Valve Guide Sleeve Tool C-3973 over valve stem and install valve (Fig 1). The special sleeve places the valve at the correct height for checking with a dial indicator.
- Attach dial indicator Tool C-3339 to cylinder head and set it at right angles to valve stem being measured (Fig 2).
- Move valve to and from the indicator. The total dial indicator reading should not exceed 0.432 mm (0.017 in.). Ream the guides for valves with oversize stems if dial indicator reading is excessive or if the stems are scuffed or scored.
Service valves with oversize stems are available. Refer to REAMER SIZES CHART table.
REAMER SIZES CHART
| REAMER O/S | VALVE GUIDE SIZE |
|---|---|
| 0.076 mm (0.003 in.) | 8.026-8.052 mm (0.316-0.317 in.) |
| 0.381 mm (0.015 in.) | 8.331-8.357 mm (0.328-0.329 in.) |
- Slowly turn reamer by hand and clean guide thoroughly before installing new valve. Ream the valve guides from standard to 0.381 mm (0.015 in.). Use a two step procedure so the valve guides are reamed true in relation to the valve seat:
- Step 1-Ream to 0.0763 mm (0.003 inch).
- Step 2-Ream to 0.381 mm (0.015 inch).