1D
Valve Lash (Clearance) Inspection
1) Remove negative cable at battery.
2) Remove cylinder head cover referring to Cylinder Head Cover Removal and Installation:M13A .
3) Using 17 mm wrench, turn crankshaft pulley (1) clockwise until cam lobes (2) become perpendicular to shim faces (3) at valves “1” and “7” as shown in the figure.
4) Check valve lashes with thickness gauge (4) according to the following procedure.
a) Check valve lashes at valves “1” and “7”.
b) Turn camshafts by 90° (by turning crankshaft with wrench).
c) Make sure that cam lobes are perpendicular to shim faces at valves to be checked (in this case, “3” and “8”), if not, adjust it by turning crankshaft. Check valve lashes.
d) In the same manner as b) – c), check valve lashes at valves “4” and “6”.
e) In the same manner as b) – c) again, check valve lashes at valves “2” and “5”.
Valve clearance specification
When cold (Coolant temperature is 15 – 25 °C (59 – 77 °F)) :
• Intake : 0.18 – 0.22 mm (0.007 – 0.009 in.)
• Exhaust : 0.28 – 0.32 mm (0.011 – 0.013 in.)
When hot (Coolant temperature is 60 – 68 °C (140 – 154 °F)) :
• Intake : 0.21 – 0.27 mm (0.008 – 0.011 in.)
• Exhaust : 0.30 – 0.36 mm (0.012 – 0.014 in.)
Replacement of Shim
1) Close the valve whose shim (2) is to be replaced by turning crankshaft, then turn tappet (3) till its cut section (1) faces inside as shown in the figure.
2) Lift valve by turning crankshaft and then remove camshaft housing bolts (1) where the shim to be replaced.
3) Install special tool with camshaft housing bolts as shown in the figure.
Special Tool
(A) : 09916–67020
Tightening torque
Camshaft housing bolts (for tightening of special tool) ( a ): 8 N·m ( 0.8 kg-m, 6.0 lb-ft)
2. Plug hole
NOTE:
• Check the special tools carved seal as shown, and then install special tool in accordance with the location of each camshaft housing.
• If special tool is holding down the shim, adjust special tool position so as not to hold down the shim by loosening camshaft housing bolt.
Special tool selection table
No. on camshaft housing Embossed mark on special tool
I2 IN2
I3, I4, I5 IN345
E2 EX2
E3, E4, E5 EX345
A: I: Intake side or E: Exhaust side
B: Position from timing chain side
C: Pointing to timing chain side
4) Turn camshaft by approximately 90° clockwise and remove shim (3).
WARNING:
Never put in the hand between camshaft and tappet.
1. Special tool 2. Magnet
5) Using a micrometer (2), measure the thickness of the removed shim (1), and determine replacement shim by calculating the thickness of new shim with the following formula and table.
Shim thickness specification
Intake side:
A = B + C – 0.200 mm (0.0078 in.)
Exhaust side:
A = B + C – 0.300 mm (0.0118 in.)
A: Thickness of new shim
B: Thickness of removed shim
C: Measured valve clearance
For example of intake side:
When thickness of removed shim is 2.400 mm (0.0945 in.), and measured valve clearance is 0.450 mm (0.0177 in.).
A = 2.400 mm (0.0945 in.) + 0.450 mm (0.0177 in.) – 0.200 mm (0.0078 in.) = 2.650 mm (0.1044 in.)
Calculated thickness of new shim = 2.650 mm (0.1043 in.)
6) Select new shim No. (1) with a thickness as close as possible to calculated value.
Available new shims No.
Thickness mm (in.) Shim No. Thickness mm (in.) Shim No.
2.175 (0.0856) 218 2.600 (0.1024) 260
2.200 (0.0866) 220 2.625 (0.1033) 263
2.225 (0.0876) 223 2.650 (0.1043) 265
2.250 (0.0886) 225 2.675 (0.1053) 268
2.275 (0.0896) 228 2.700 (0.1063) 270
2.300 (0.0906) 230 2.725 (0.1073) 273
2.325 (0.0915) 233 2.750 (0.1083) 275
2.350 (0.0925) 235 2.775 (0.1093) 278
2.375 (0.0935) 238 2.800 (0.1102) 280
2.400 (0.0945) 240 2.825 (0.1112) 283
2.425 (0.0955) 243 2.850 (0.1122) 285
2.450 (0.0965) 245 2.875 (0.1132) 288
2.475 (0.0974) 248 2.900 (0.1142) 290
2.500 (0.0984) 250 2.925 (0.1152) 293
2.525 (0.0994) 253 2.950 (0.1161) 295
2.550 (0.1004) 255 2.975 (0.1171) 298
2.575 (0.1014) 258 3.000 (0.1181) 300
7) Install new shim facing shim No. side with tappet.
8) Lift valve by turning crankshaft counterclockwise (in opposite direction against above Step 4)) and remove special tool.
Special Tool
(A) : 09916–67020
1. Tappet 2. Camshaft
9) Install camshaft housing (1) and tighten bolts to specified torque.
Tightening torque
Camshaft housing bolt ( a ): 11 N·m ( 1.1 kg-m, 8.0 lb-ft)
10) Check valve clearance again.
11) Install cylinder head cover referring to Cylinder Head Cover Removal and Installation:M13A .