1991 LEXUS SC400 engine

wUsing compressed air and a magnetic finger, remove
the adjusting shim by blowing air into the shim hole.
HINT: Remove the adjusting shim from the intake manifold
side.
NOTICE: Do not drop the adjusting shim into portions A and
B. If dropped into portion A, the adjusting shim will pass
through the cylinder head and cylinder block into the oil pan.
If dropped into portion B, the adjusting shim cannot be recov-
ered without removing the exhaust camshaft.
EG±22±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName

(b) Determine the replacement adjusting shim size by followingthe Formula or Charts:
wUsing a micrometer, measure the thickness of the
removed shim.
w Calculate the thickness of a new shim so that the valve
clearance comes within specified value.
T 000 Thickness of removed shim
A 000 Measured valve clearance
N 000 Thickness of new shim
Intake:
N = T + (A ± 0.20 mm (0.008 in.))
Exhaust: N = T + (A ± 0.30 mm (0.012 in.))
w Select a new shim with a thickness as close as possible
to the calculated value.
HINT: Shims are available in 33 sized in increments of 0.025
mm (0.0010 in.) from 2.50 mm (0.0984 in.) to 3.30 mm
(0.1299 in.)
(c) Install a new adjusting shim. wPlace a new adjusting shim on the valve lifter.
w Using SST (A), press down the valve lifter and remove
SST (B).
SST 09248±05410, 09248±05021
(d) Recheck the valve clearance.
±
1UZ±FE ENGINE ENGINE MECHANICALEG±23
WhereEverybodyKnowsYourName

V01867
EG±24±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName

V01868
±
1UZ±FE ENGINE ENGINE MECHANICALEG±25
WhereEverybodyKnowsYourName

23. REINSTALL THEFT DETERRENT HORN
(a) Install the theft deterrent horn with the bolt.
(b) Connect the connector.
24. REINSTALL RH CYLINDER HEAD COVER
(a) Remove any old packing (FIPG) material.
(b) Apply seal packing to the cylinder head as shown in theillustration.
Seal packing:Part No. 08826±00080 or equivalent
(c) Install the gasket to the cylinder head cover.
(d) Install the seal washer to the bolt.
(e) Install the cylinder head cover with the 8 bolts.
Torque: 5.9 N Vm (60 kgf Vcm, 52 in. Vlbf)
(f) Connect the 4 high±tension cords to the spark plugs.
(g) Connect the front high±tension cord clamp to the lower
high±tension cord cover.
(h) P l a c e t h e f r o n t h i gh±tension cord clamp to the rear
high±tension cord clamp.
(i) Install the 2 bolts holding the high±tension cord clamps to the
cylinder head cover.
(j) Connect the 5 high±tension cords to the front side of the front
high±tension cord clamp.
(k) Connect the No. 2 high±tension cord to the cord clamp on the
front high±tension cord clamp.
EG±26
±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName

25. REINSTALL LH CYLINDER HEAD COVER
(a) Remove any old packing (FIPG) material.
(b) Apply seal packing to the cylinder head as shown in theillustration.
Seal packing:Part No. 08826±00080 or equivalent
(c) Install the gasket to the cylinder head cover.
(d) Install the seal washer to the bolt.
(e) Install the cylinder head cover with the 8 bolts.
Torque: 5.9 N Vm (60 kgf Vcm, 52 in. Vlbf)
(f) Connect the 2 engine wire connectors.
(g) Connect the 4 injector connectors.
(h) Install the engine wire protector to the 2 brackets on the
delivery pipe.
(i) Connect the 4 high±tension cords to the spark plugs.
(j) Connect the front high±tension cord clamp to the lower high±tension cord cover.
(k) P l a c e t h e f r o n t h i gh±tension cord clamp to the rear
high±tension cord clamp.
(l) Install the 2 bolts holding the high±tension cord clamps to the
cylinder head cover.
(m) Connect the 5 high±tension cords to the front side of the front
high±tension cord clamp.
±
1UZ±FE ENGINE ENGINE MECHANICALEG±27
WhereEverybodyKnowsYourName

(n) Connect the No. 1 high±tension cord to the cord clamp on the
front high±tension cord clamp.
26. REINSTALL THROTTLE BODY
(a) Disconnect the following hoses: (1) PCV hose to throttle body
(2) Water bypass hose to throttle body
(b) Install a new gasket and throttle body with the 2 bolts and 2 nuts.
Torque: 18 N Vm (185 kgf Vcm, 13 ft Vlbf)
(c) Install the water bypass pipe (from the rear bypass joint) to
the clamp on the engine wire cover.
(d) Connect the following hoses: (1) Water bypass hose to IAC valve
(2) California:Vacuum hose from throttle body
(3) Except California: 3 vacuum hoses from throttle body
EG±28
±
1UZ±FE ENGINE ENGINE MECHANICAL
WhereEverybodyKnowsYourName

(e) Connect the following connectors:(1) Throttle position sensor connector
(2) w/ TRAC:Sub±throttle position sensor connector
(3) w/ TRAC: Sub±throttle actuator connector
27. REINSTALL HEATER WATER VALVE
(a) Install the water valve and bracket assembly with the 2 bolts.
(b) Install the engine wire clamp with the bolt.
(c) Connect the VSV connector.
28. REINSTALL RH NO.3 TIMING BELT COVER
(a) Install the 3 gaskets to the timing belt cover.
(b) Fit the portion A of the timing belt cover, matching it with the lower high±tension cord cover.
(c) Install the timing belt cover with the 3 bolts.
29. REINSTALL VSV FOR EVAP SYSTEM Install the VSV with the 2 bolts.
30. REINSTALL LH NO.3 TIMING BELT COVER
(a) Install the 3 gaskets to the timing belt cover.
(b) Install the cord grommet to the high±tension cord (from the LH ignition coil).
(c) Install the cord grommet to the timing belt cover.
(d) Fit the portion A of the timing belt cover, matching it with the lower high±tension cord cover.
(e) Install the timing belt cover with the 4 bolts.
±
1UZ±FE ENGINE ENGINE MECHANICALEG±29
WhereEverybodyKnowsYourName