Toyota Supra 1990 Manual page 41

33
2 2 4 4
EX
INI
2
ENGINE MECHANICAL - Engine Tune-Up EM-9
5 5
EM2891
6
EM2892
EM3522
EM5458
(c) Turn the crankshaft pulley 2/3 revolution (240°) and
measure the clearance of No.3 (IN) and No.5 (IN) and
No.3 (EX) and No.6 (EX) valves.
(d)
• Check that the valve lifters on the No.3 cylinder are
loose.
• Measure only those valves indicated in the figure.
• Record the measurements which are out of specifi-
cation. They will be used later to determine the re-
quired replacement shims.
Turn the crankshaft pulley 2/3 revolution (240°) and
measure the clearance of No.2 (IN) and No.6 (IN) and
No.2 (EX) and No.4 (EX) valves.
• Check that the valve lifters on the No.2 cylinder are
loose.
• Measure only those valves indicated in the figure.
• Record the measurements which are out of specifi-
cation. They will be used later to determine the re-
quired replacement shims.
6. ADJUST VALVE CLEARANCE
(a) Remove the adjusting shim.
• Turn the crankshaft to position the cam lobe of the
camshaft on the adjusting valve upward.
• Position the valve lifter notch so that the shim can
be removed with a small screwdriver.
• Using SST (AI. press down the valve lifter and place
SST (B) between the camshaft and valve lifter.
Remove SST (A).
SST 09248-55010
HINT: For easy removal of the shim, when positioning
SST (B), set it on the lifter so there is space enough to be
able to remove the shim.
• Remove the adjusting shim with a small screwdriver
and magnetic finger.