Valve Clearance Inspection And Adjustment - Toyota 1HD-FT Repair Manual

EG
EG-14
ENGINE - ENGINE MECHANICAL
VALVE CLEARANCE INSPECTION
AND ADJUSTMENT
"' _ -101
HINT: Inspect and adjust the valve clearance when
the engine is cold.
1. REMOVE CYLINDER HEAD COVER
(See stepi 2 or 3 and 11
in
cylinder head removal)
2. SET NO.1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley clockwise. and align its
groove with the groove of the timing gear cover.
(b) Check that the valve rocker arm on the No.1 cylinder
are loose and valve rocker arm on the No.6 cylinder
are tight.
If
not. turn
the crankshaft 1 revolution (360°) and
align the mark as above.
3_ INSPECT VALVE CLEARANCE
(a) Check only the valves indicated in the illustration.
• Using a feeler gauge, measure the clearance be·
tween the adjusting screw on the valve rocker
arm and the valve bridge.
• Record the out - of - specification valve clear-
ance measurements.
Velve cleerence (Cold):
Inteke
0.17 - 0.23 mm (0.007 - 0.009 in.)
Exheu.t
0.47 - 0.53 mm (0.019 - 0.021 in.)
(b) Turn the crankshaft pulley 1 revolution (360°) and
align the mark as above. (See procedure step 2)
(c) Check only the valves indicated as shown. Measure
the valve clearance. (See procedure in step (a))
Valve
Bridge
b7loosen
:ID~
I'
Adjusting
Screw
4.
{aj
ADJUST VALVE CLEARANCE
Loosen the lock nut on the valve bridge. and loosen
the adjusting screw until the adjusting screw and
valve stem are completely separated.
NOTICE: Hold the velve bridge with e wrench. end 100.en
the lock nut. Do not epply torque to the velve bridge.