Toyota Land Cruiser 1988 Repair Manual page 38

ENGINE MECHANICAL- Engine Tune-up EM-7
EM4486
INSPECTION AND ADJUSTMENT OF
VALVE CLEARANCE
NOTE: Inspect and adjust the valve clearance after en-
gine has reached normal operating temperature.
1. REMOVE AIR CLEANER HOSE
2. REMOVE CYLINDER HEAD COVER
(See step 21 on page EM-14)
3. SET N0.1 CYLINDER TO TDC/COMPRESSION
(a) Align the TDC mark of the drive plate with the tim-
ing pointer by turning the crankshaft clockwise with
a wrench.
(b) Check that the rocker arms on the No. 1 cylinder are
loose and rocker arms on the No. ·6 are tight.
If not, turn the crankshaft one revolution (360°) and align
the mark as above.
4. INSPECT AND ADJUST VALVE CLEARANCE
Front ... First
(a) Measure only those valves indicated by arrows.
EM1519
Front • Second
5.
6.
EM1519
Valve clearance (Hot):
Intake 0.20 mm (0.008 in.)
Exhaust 0.35 mm (0.014 in.)
• Using a thickness gauge, measure the valve clear-
ance between the valve stem and rocker arm.
Loosen the lock nut and turn the adjusting screw
to set the proper clearance.
Hold the adjusting screw in position and tighten
the lock nut.
• Recheck the valve clearance. The thickness
gauge should slide with a very slight drag.
(b) Turn the crankshaft pulley one revolution (360°)
and align the mark as above.
Adjust only the valves indicated by arrows.
INSTALL CYLINDER HEAD COVER
(See step 6 on page EM-29)
INSTALL AIR CLEANER HOSE