Valve Clearance: Adjustments
NOTE: Inspect and adjust the valve clearance when the engine is cold.1. Remove throttle body and intake air connector assembly, refer to power management.
2. Disconnect high-tension wires from cylinder head covers.
3. Remove No.3, No.1 and No.2 cylinder head covers as follows:
(a) Remove the 4 bolts, 4 nuts and No.3 cylinder head cover.
(b) Remove the 4 bolts, No.1 cylinder head cover and gasket.
(c) Remove the 4 bolts, No.2 cylinder head cover and gasket.
4. Set no.1 cylinder to TDC/compression as follows:
(a) Turn the crankshaft pulley and align its groove with the timing mark "0" of the No.1 timing belt cover.
NOTE: Always turn the crankshaft clockwise.
(b) Check that the timing marks of the camshaft timing pulleys are aligned with the timing marks of the No.4 timing belt cover. If not, turn the crankshaft 1 revolution (360°).
5. Inspect valve clearance as follows:
(a) Check only those valves indicated in the illustration as follows:
- Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
- Record the valve clearance measurements of those that are out of specification. They will be used later to determine the required replacement adjusting shim.
Standard Values:
Valve clearance (Cold):
Intake: 0.15-0.25 mm (0.006-0.010 inch).
Exhaust: 0.25-0.35 mm (0.010-0.014 inch).
(b) Turn the crankshaft pulley 1 revolution (360°), and align the groove with the timing mark "0" of the No.1 timing belt cover.
(c) Check only the valves indicated in the illustration, measure the valve clearances described in step (a).
6. Adjust valve clearance as follows:
(a) Remove the adjusting shim as follows:
- Turn the camshaft so that the cam lobe for the valve to be adjusted faces up.
- Turn the valve lifter with a screwdriver so that the notches are perpendicular to the camshaft.
- Insert valve lifter stopper (B) Special Service Tool (SST) No. 09248-05420, or equivalent, gently from the inside as shown in the illustration.
- Using valve lifter press (A) Special Service Tool (SST) No. 09248-05410, or equivalent, hold the camshaft as shown in the illustration.
- Using valve lifter press (A), press down the valve lifter and place valve lifter stopper (B) between the camshaft and valve lifter, then remove valve lifter press (A).
NOTE:
- Apply valve lifter stopper (B) at slight angle on the side marked with "7", at the position shown in the illustration.
- Using a small screwdriver and a magnetic finger, remove the adjusting shim.
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(b) Determine the replacement adjusting shim size according to the tables above or by the following formula:
- Using a micrometer, measure the thickness of the removed shim.
- Calculate the thickness of a new shim so the valve clearance comes within specified value.
T Thickness of used shim
A Measured valve clearance
N Thickness of new shim
Intake
N = T + (A-0.20 mm (0.008 inch))
Exhaust
N = T + (A-0.30 mm (0.012 inch))
- Select a new shim with a thickness as close as possible to the calculated values.
NOTE: Shims are available in 17 sizes in increments of 0.050 mm (0.0020 inch), from 2.500 mm (0.0984 inch) to 3.300 mm (0.1299 inch).
(c) Install a new adjusting shim as follows:
- Place a new adjusting shim on the valve lifter, with imprinted numbers facing down.
- Press down the valve lifter with valve lifter press (A), and remove valve lifter stopper (B).
(d) Recheck the valve clearance.
7. Reinstall No.2, No.1 and No.3 cylinder head covers as follows:
(a) Remove any old packing (FIPG) material.
(b) Apply seal packing part No. 08826-00080, or equivalent, to the cylinder head as shown in the illustration.
(c) Install the gaskets to the No.1 and No.2 cylinder head covers.
(d) Install the No.2 cylinder head cover with the 4 bolts, then tighten to 8.3 Nm (85 kg.cm, 74 in.lb).
(e) Install the No.1 cylinder head cover with the 4 bolts, then tighten to 8.3 Nm (86 kg.cm, 74 in.lb).
(f) Install the No.3 cylinder head cover with the 4 bolts and 4 nuts, then tighten to 8.3 Nm (85 kg.cm, 74 in.lb).
8. Reconnect high-tension cords to cylinder head covers.
9. Reinstall throttle body and intake air connector assembly.