Toyota 4A-FE - Inspection and Adjustment of Valve Clearance

EM-16
1 1
ENGINE MECHANICAL - Engine Tune-up (4A-FE)
EM7820
3 3 4 4
EM7821
INSPECTION AND ADJUSTMENT OF VALVE
CLEARANCE
HINT: Inspect and adjust the valve clearance when the
engine is cold.
1. DISCONNECT HIGH-TENSION CORDS FROM SPARK
PLUGS
2. REMOVE CYLINDER HEAD COVER (See page EM-62)
3. SET N0.1 CYLINDER TO TDC/COMPRESSION
(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 cylinder are
loose and valve
lifters on the No.4 cylinder are tight.
If not, turn the crankshaft one revolution (360°) and
align
the mark as above.
4.
INSPECT VALVE CLEARANCE
(a) Check only those valves indicated in the illustration.
• Using
a thickness gauge, measure the clearance
between the valve lifter and camshaft.
• Record the valve clearance measurements which
are out of specification. They will be used later to
determine the required replacement adjusting
shim .
Valve clearance (Cold):
Intake 0.15 - 0.25 mm (0.006 - 0.010 in.)
Exhaust 0.20 - 0.30 mm (0.008 - 0.012 in.)
(b) Turn the crankshaft one revolution (360°) and align
the mark as above. (See procedure step 3)
(c) Check only the valves indicated as shown.
Measure the valve clearance.
(See
procedure step (a)).
5. ADJUST VALVE CLEARANCE
(a) Remove the adjusting shim.
• Turn the
crankshaft to position the cam lobe of the
camshaft on the adjusting valve upward.
• Using
SST (A). press down the valve lifter and
ptace
SST (8) between the camshaft and valve
lifter. Remove
SST (A).
SST 09248-55010