Valve, Valve Guide
VALVE, VALVE GUIDE1. Measure the valve head margin thickness of each valve. Replace the valve if necessary.
Margin thickness
IN: 1.1 mm (0.043 in) min.
EX: 1.2 mm (0.047 in) min.
2. Measure the length of each valve. Replace the valve if necessary.
Length
IN
Standard: 91.99-92.59 mm (3.622-3.645 in)
Minimum: 91.79 mm (3.614 in)
EX
Standard: 92.41-93.01 mm (3.639-3.661 in)
Minimum: 92.21 mm (3.630 in)
3. Measure the stem diameter of each valve in X and Y directions at the three points (A, B, and C) shown. Replace the valve if necessary.
Diameter
IN
Standard: 5.470-5.485 mm (0.2154-0.2159 in)
Minimum: 5.420 mm (0.2134 in)
EX
Standard: 5.465-5.480 mm (0.2152-0.2157 in)
Minimum: 5.415 mm (0.2132 in)
4. Measure the inner diameter of each valve guide in X and Y directions at the three points (A, B, and C) shown. Replace the valve guide if necessary.
Inner diameter:
5.51-5.53 mm (0.2170-0.2177 in)
5.52-5.54 mm (0.2174-0.2181 in) (Service parts)
5. Calculate the valve stem-to-valve guide clearance. Subtract the outer diameter of the valve stem from the inner diameter of the corresponding valve guide.
Clearance
IN:
0.025-0.060 mm (0.0010-0.0023 in)
0.035-0.070 mm (0.0014-0.0027 in) (Service parts)
EX:
0.030-0.065 mm (0.0012-0.0025 in)
0.040-0.075 mm (0.0016-0.0029 in) (Service parts)
Maximum: 0.2 mm (0.008 in)
6. If the clearance exceeds the specification, replace the valve and/or valve guide.
7. Measure the protrusion height (dimension (A)) of each valve guide without valve spring seat, low. Replace the valve guide if necessary.
Height: 9.22-9.82 mm (0.363-0.386 in)
Replacement of valve guide
Removal
Using the SST, remove the valve guide from the combustion chamber side.
Installation
1. Assemble the SSTs as shown.
2. Fit the clip onto the valve guide.
3. Using the SST, tap the valve guide in from the side opposite the combustion chamber until the SST contacts the cylinder head.
4. Verify that the valve guide protrusion height is within the specification.