Adj Ust Valve Clearance - Toyota 1C Repair Manual

ENGINE MECHANICAL -
Engine Tune-up EM-'17
,.. Front
EX
IN IN
,.. Fron t
EX
o,am
11m
IN IN
Inta ke side:
New shi m t hick . n ess
=
T
+
[A - 0.25 mm
(0.00 98 in.I]
Ex haust sid e:
New shi m t hick ness
=
T
+
[A - 0 .30 mm
(0.01 18 in.)]
Oid 1H
(b)
Measure the clearance of half of the valves.
• Measure only th ose valves indicated in th e f igure.
• Record the measurements w hich are out of
specification . They wiU be used l ater to determine
the required replacement shims,
Valv e clearanc e (Cold ):
Inta ke 0 .20 - 0.30 mm (0 .008 - 0 .012 in .I
Ex haust 0 .2 5 - 0 .35 mm (0 .010 - 0 .014 in.I
(cl Tum the crankshaft pulley one revolution and
measure the other valves.
• Tum the crankshaft pulley one revolution and align
its groove and timing poi nter on the oil pump.
• Measure only the valves indicated by the arrows in
the figure.
5 , ADJ UST VALVE CLEARANCE
NOTE: Vnlve clearance is adjusted one cylinder at a time.
(o)
Turn the cronkshaft pulley to position the intake
com1holt
lobe 11f the cylinder upward.
(hi
Po11tlon lhe notch of lhe lifter so
that
ii is accessible
w1 1h • , moll
aerewdrtver .
(cl
Pince the SST between the two cams and tum the
hondle
10
press down the valve
Utters .
SST 09248 -64010
NOTE: Make sure
the
SST is installed so that it presses
evenly on both lifters .
(d) Using
a
small screwdriver and magnet remove the
shims.
(el Determine the replacement shim size by using the
follow ing Formula and Charts.
• Using a micrometer. measure the thickness of the
shim that was removed.
• Calculate the thickness of a new shim so that the
valve clearance comes within the specified value.
T . . . . .. Thickness of shim used
A . , ... . Valve clearance measured
• Select a shim with a thickness as close as possible
to the calculat ed value.
NOTE: Shims are available in 25 sizes. in increments of
0.050 mm (0.0020
in.I.
from 2.200 mm (0.0866 in.I to
3.400 mm (0.1339 in.l. Thickness is stamped o n th e new
shims.