MPV ES 4WD V6-3.0L SOHC (1997)
Valve Guide: Testing and Inspection
1. Measure the valve guide inner diameter in X and Y directions at three points (A, B and C) as shown. Replace the guide if necessary.
Inner diameter
IN: 7.01-7.03 mm (0.2752-0.2767 in)
EX: 8.07-8.09 mm(0.3178-0.3185 in)
2. Measure the valve stem-to-guide clearance.
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Method No.1 Subtract the valve stem outer diameter from the inner diameter of the corresponding valve guide.
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Method No.2 Measure the valve stem play at a point close to the valve guide with the valve lifted slightly off the valve seat.
Clearance
IN: 0.025-0.060 mm (0.0010-0.0023 in)
EX: 0.030-0.065 mm (0.0012-0.0025 in)
Maximum: 0.20 mm (0.008 in)
3. If the clearance exceeds the maximum, replace the valve and/or valve guide.
4. Measure each valve guide projection height (dimension A in the figure). Replace the guide if necessary.
Height
IN: 13.2-13.8 mm (0.520-0.543 in)
EX: 19.6-20.2 mm (0.772-0.795 in)
