ZDX V6-3.7L (2010)
Valve Guide: Service and Repair
Valve Guide Replacement
Special Tools Required
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Valve Guide Driver, 5.35 x 9.7 mm 07742-0010100
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Valve Guide Reamer, 5.5 mm 07HAH-PJ7A100
1. Inspect the valve stem-to-guide clearance See: Service and Repair/Overhaul/Valve Stem-to-Guide Clearance Inspection.
2. As illustrated, use a commercially available air-impact valve guide driver (A) modified to fit the diameter of the valve guides. In most cases, the
same procedure can be done using the valve guide driver and a conventional hammer.
3. Select the proper replacement guides, and chill them in the freezer section of a refrigerator for at least an hour.
4. Use a hot plate or oven to evenly heat the cylinder head to 300 °F (150 °C). Monitor the temperature with a cooking thermometer. Do not get the
head hotter than 300 °F (150 °C); excessive heat may loosen the valve seats.
5. Working from the camshaft side, use the driver and an air hammer to drive the guide about 2 mm (0.08 in) towards the combustion chamber. This
will knock off some of the carbon and make removal easier. Hold the air hammer directly in line with the valve guide to prevent damaging the
driver. Wear safety goggles or a face shield.
6. Turn the head over, and drive the guide out toward the camshaft side of the head.
