Highlander 2WD V6-3.0L (1MZ-FE) (2003)
k. Disconnect the engine wire from emission control valve set.
l.
Using an 8 mm socket hexagon wrench, remove the 2 bolts, 2 nuts and intake air surge tank.
8. REMOVE IGNITION COIL ASSY
9. REMOVE CYLINDER HEAD COVER SUB-ASSY
10. REMOVE CYLINDER HEAD COVER SUB-ASSY LH
a. Using a E6 torx socket wrench, remove the 2 bolts, and disconnect the engine wire protector.
b. Remove the 9 bolts and cylinder head cover.
11. INSPECT VALVE CLEARANCE
a. Turn the crankshaft pulley, and align its groove with the timing mark "O" of the No. 1 timing belt cover.
b. Check that the valve lifters on the No. 1 (IN and EX) are loose.
If not, turn the crankshaft 1 revolution (360°) and align the mark as above.