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*01 02 03 04 SNR9A00A14680263001KBAT00 Special Tools Required 6-56 Cylinder Head Valve Guide Replacement A 5.3 mm 10.8 mm 87 mm 57 mm • Valve guide driver, 5.5 mm 07742-0010100 1. Inspect the valve stem-to-guide clearance (see page 6-55). 2. As illustrated, use a commercially available air- impact valve guide driver (A) modified to fit the 3. Select the proper replacement guides, and chill them in the freezer section of a refrigerator for at 4. Use a hot plate or oven to evenly heat the cylinder head to 150 °C (300 °F). Monitor the temperature 5. Working from the camshaft side, use the driver and an air hammer to drive the guide about 2 mm 6. Turn the head over, and drive the guide out toward the camshaft side of the head. 7. If a valve guide won’t move, drill it out with a 8 mm (5/16 in.) bit, then try again. NOTE: Drill guides only in extreme cases, you 8. Remove out the new guide(s) from the freezer, one at a time, as you need them. |