Adjustment Of Valve Clearances - Toyota 3b Repair Manual

ENGINE MECHANICAL
-
Engine Tune-up
EM-21
ssively
replace
lir from
ite
it
up
vater is
nent
or
:LT
,1
)
(r)
\u'
Front
<_
First
EM61
33
EM61 32
Second
ADJUSTMENT OF VALVE CLEARANCES
1.
WARM UP ENGINE
Allow the engine to reach normal operating temperature.
2.
REMOVE CYLINCER HEAD COVER
3.
SET
NO. 1 CYLINDER TO TDC,/COMPRESSION
(a)
Align the groove on the pulley
with the
timing gear
cover groove
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.
4 cylinder are tight.
lf
not,
turn the crankshaft one revolution (3600) and align
the mark
as above.
4.
ADJUSTVALVE CLEARANCES
(a)
Measure only those valves indicated
by
arrows.
Valve clearance (Hot):
lntake
O.2O
mm
(O.OO8 in.)
Exhaust
0.36 mm
(O.O14 in.)
Using a thickness gauge, measure the valve clear-
ance between the valve stem cap 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 one revolution (3600) and
align
the mark as above.
Adjust only the valves indicated
by
arrows.
INSTALL CYLINDER HEAD COVER 5.