Valve Clearance: Adjustments
VALVE CLEARANCEADJUSTMENT
1. DISCONNECT BATTERY NEGATIVE TERMINAL
2. REMOVE ENGINE UNDER COVER RH
3. REMOVE CYLINDER HEAD COVER NO.2
(a) Remove the cylinder head cover No. 2.
4. REMOVE IGNITION COIL ASSEMBLY
(a) Remove the ignition coil assembly.
5. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY
(a) Remove the cylinder head cover sub-assembly.
6. SET NO. 1 CYLINDER TO TDC / COMPRESSION
(a) Set the No. 1 cylinder to the TDC/compression.
7. CHECK VALVE CLEARANCE
(a) Check only the valves indicated.
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft. Valve clearance (Cold):
Intake: 0.15 to 0.25 mm (0.0059 to 0.0098 in.)
Exhaust: 0.25 to 0.35 mm (0.0098 to 0.0138 in.)
(2) Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve lifters.
(b) Turn the crankshaft 1 revolution (360°) to set the No. 4 cylinder to the TDC/compression.
(c) Check only the valves indicated.
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft. Valve clearance (Cold):
Intake: 0.15 to 0.25 mm (0.0059 to 0.0098 in.)
Exhaust: 0.25 to 0.35 mm (0.0098 to 0.0138 in.)
(2) Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve lifters.
8. ADJUST VALVE CLEARANCE
(a) Remove the No. 2 camshaft.
(b) Remove the camshaft.
(c) Remove the valve lifters.
(d) Using a micrometer, measure the thickness of the removed valve lifters.
(e) Calculate the thickness of a new lifter so that the valve clearance comes within the specified values.
Valve clearance:
Intake: A = B + (C - 0.20 mm (0.0079 in.))
Exhaust: A = B + (C - 0.30 mm (0.0118 in.))
HINT:
^ Select a new lifter with a thickness as close to the calculated values as possible.
^ Lifters are available in 35 sizes in increments of 0.020 mm (0.0008 in.), from 5.060 mm (0.1992 in.) to 5.740 mm (0.2260 in.).
^ Refer to the New Lifter Thickness table.
Intake valve clearance (Cold): 0.15 to 0.25 mm (0.0059 to 0.0098 in.)
EXAMPLE: The 5.250 mm (0.2067 in.) lifter is installed, and the measured clearance is 0.400 mm (0.0157 in.). Replace the 5.250 mm (0.2067 in.) lifter with a new No. 46 lifter.
New Lifter Thickness mm (in.):
Exhaust valve clearance (Cold): 0.25 to 0.35 mm (0.0098 to 0.0138 in.)
EXAMPLE: The 5.340 mm (0.2102 in.) lifter is installed, and the measured clearance is 0.440 mm (0.0173 in.). Replace the 5.340 mm (0.2102 in.) lifter with a new No. 48 lifter.
New Lifter Thickness mm (in.):
(f) Install the camshaft.
(g) Install the No. 2 camshaft.
9. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY
(a) Install the cylinder head cover sub-assembly.
10. INSTALL IGNITION COIL ASSEMBLY
(a) Install the ignition coil assembly.
11. CONNECT BATTERY NEGATIVE TERMINAL
Torque: 5.4 N*m (55 kgf*cm, 48 in.*lbf)
12. CHECK ENGINE OIL LEAKAGE
13. INSTALL CYLINDER HEAD COVER NO.2
(a) Install the cylinder head cover No. 2.
14. INSTALL ENGINE UNDER COVER RH