1D-74 Engine Mechanical: For J20 Engine
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 – 0.20 mm (0.008 in.)
Exhaust side:
A = B + C – 0.30 mm (0.012 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 2.40 mm (0.094
in.), and measured valve clearance is 0.45 mm
(0.018 in.).
A = 2.40 mm (0.094 in.) + 0.45 mm (0.018 in.) – 0.20
mm (0.008 in.) = 2.65 mm (0.104 in.)
Calculated thickness of new shim = 2.65 mm (0.104
in.)
6) Select new shim No. (1) with a thickness as close as
possible to calculated value.
Available new shims No.
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): 09916–66510
9) Install camshaft housing (1) and tighten bolts to
specified torque.
Tightening torque
Camshaft housing bolt (a): 11 N·m (1.1 kgf-m,
8.0 lb-ft)
10) Turn crankshaft pulley more than 4 rotations.
11) Check valve clearance again after adjusting it.
12) After checking and adjusting all valves.
13) Install cylinder head cover referring to “Cylinder
Head Cover Removal and Installation: For J20
Engine”.
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
I2RH0B140014-01
1. Tappet
2. Camshaft
I2RH0B140015-01
(A)
2
1
I3RM0A140006-01
I2RH0B140149-01
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