Landcruiser 4WD L6-3955cc 4.0L OHV (3F-E) (1988)
Valve Clearance: Adjustments
INSPECTION AND ADJUSTMENT OF VALVE CLEARANCE
NOTE: Inspect and adjust the valve clearance after engine has reached normal operating temperature.
1. REMOVE AIR CLEANER HOSE
2. REMOVE CYLINDER HEAD COVER
3. SET NO.1 CYLINDER TO TDC/COMPRESSION
(a) Align the TDC mark of the drive plate with the timing 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 (36O°) and align the mark as above.
4. INSPECT AND ADJUST VALVE CLEARANCE
(a) Measure only those valves indicated by arrows.
Valve clearance (Hot):
Intake 0.20 mm (0.008 in.)
Exhaust 0.35 mm (0.014 in.)
-
Using a thickness gauge, measure the valve clearance 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 (36O°) and align the mark as above.