Valve Clearance: Adjustments

ADJUSTMENT
1. REMOVE CYLINDER HEAD COVER SUB-ASSY
2. REMOVE CYLINDER HEAD COVER SUB-ASSY LH
3. SET NO. 1 CYLINDER TO TDC/COMPRESSION





a. Turn the crankshaft damper, and align its groove with timing mark "0" of the timing belt No. 1 cover.





b. Check that the timing marks (1 dot mark) of the intake and exhaust camshaft gears on the LH bank are aligned.
If not, turn the crankshaft 1 revolution (360°) and align the mark as above.
4. INSPECT VALVE CLEARANCE





a. Check the only the valves indicated.
1. Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
2. Record the out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjust shim.





Valve clearance (Cold)





b. Turn the crankshaft 1 revolution (360°) and align the mark as above (See procedure in step 3).
c. Check only the valves indicated as shown. Measure the valve clearance (See procedure in step (a)).
5. REMOVE CAMSHAFT
6. REMOVE NO.3 CAMSHAFT SUB-ASSY
7. ADJUST VALVE CLEARANCE





a. Using a magnet with powerful force, remove the valve lifter and adjusting shim.

NOTICE:
^ Since shims might drop inside the cylinder head, the operation should be performed slowly.
^ Shims should be classified by the installation.

b. Determine the replacement adjusting shim size according to the these Formula or Charts:
1. Using a micrometer, measure the thickness of the removed shim.





2. Calculate the thickness of a new shim so that the valve clearance comes within the specified value.
T = Thickness of removed 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))
c. Select a new shim with a thickness as close as possible to the calculated value.

HINT: Shims are available in 41 increments of 0.020 mm (0.0008 inch), from 2.00 mm (0.0787 inch to 2.80 mm (0.1102).

d. Reinstall a new adjusting shim to the spring retainer.
e. Reinstall the valve lifter.
8. INSTALL NO.3 CAMSHAFT SUB-ASSY
9. INSTALL CAMSHAFT
10. INSTALL CYLINDER HEAD COVER SUB-ASSY LH
11. INSTALL CYLINDER HEAD COVER SUB-ASSY





Adjusting Shim Selection Chart (Intake)





Adjusting Shim Selection Chart (Exhaust)