EM-20
ENGINE MECHANICAL
-
Engine Tune-up
ADJUSTMENT OF VALVE CLEARANCE
HINT:
Adjust the valve clearance while the engine is cold.
No. 1
No. 3
E X
E X
No.
2
No. 4
EX
EX
(2 L-T)
REMOVE AIR CLEANER
(w/ Intake Pipe)
REMOVE INTAKE PIPE
REMOVE CYLINDER HEAD COVER
(See step 16 on page EM-38)
SET NO. 1 CYLINDER TO TDCICOMPRESSION
(a)
Turn the crankshaft pulley clockwise, and align its
groove with the timing pointer.
(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.
ADJUST VALVE CLEARANCE
(a) Check only the valves indicated in the illustration.
Using a feeler gauge, measure the clearance be-
tween 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
0.20
-
0.30 mm (0.008
-
0.012 in.)
Exhaust
0.40
-
0.50 mm (0.016
-
0.020 in.)
(b) Turn the crankshaft one revolution (360°), and align
the mark as above (See procedure step 4).
(c) Check only the valves indicated in the illustration.
Measure the valve clearance.
(See procedure step (a))
(d) Remove the adjusting shim.
Turn the crankshaft to position the cam lobe of
the camshaft on the adjusting valve upward.
Using SST, press down the valve lifter.
SST 09248-6401 0
HINT:
Before pressing down the valve lifter, position the
notch on the exhaust manifold side.
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