TOYOTA SEQUOIA 2001 Service Repair Manual

A04082
A03209
A03201
12.3 to 12.7 mm
EM±54
± ENGINE MECHANICALCYLINDER HEAD
2633 Author: Date:
2005 SEQUOIA (RM1146U)
22. INSPECT CAMSHAFT GEAR BACKLASH
(a) Install the drive gear to the camshaft timing tube
(See page EM±58).
(b) Install the camshaft timing tube to the intake camshaft
(See page EM±58).
(c) Install the camshafts without installing the exhaust cam-
shaft sub±gear and front bearing cap
(See page EM±58).
(d) Using a dial indicator, measure the backlash.
Standard backlash:
0.020 to 0.200 mm (0.0008 to 0.0079 in.)
Maximum backlash: 0.30 mm (0.0118 in.)
If the backlash is greater than the maximum, replace the intake
camshaft drive gear and exhaust camshaft.
(e) Remove the camshafts.
(f) Remove the camshaft timing tube from the intake cam-
shaft.
(g) Remove the drive gear from the camshaft timing tube.
23. INSPECT VALVE LIFTERS AND LIFTER BORES
(a) Using a caliper gauge, measure the lifter bore diameter
of the cylinder head.
Lifter bore diameter:
31.000 to 31.016 mm (1.2205 to 1.2211 in.)
(b) Using a micrometer, measure the lifter diameter at the
valve lifter center line, 12.3 to 12.7 mm (0.484 to 0.500 in.)
from the valve lifter head.
Lifter diameter:
30.968 to 30.976 mm (1.2192 to 1.2195 in.)
(c) Subtract the lifter diameter measurement from the lifter
bore diameter measurement.
Standard oil clearance:
0.024 to 0.050 mm (0.0009 to 0.0020 in.)
Maximum oil clearance:
0.07 mm (0.0028 in.)
If the oil clearance is greater than the maximum, replace the lift-
er. If necessary, replace the cylinder head.

A23376
± ENGINE MECHANICALCYLINDER HEAD
EM±55
2634 Author: Date:
2005 SEQUOIA (RM1146U)
24. INSPECT EXHAUST MANIFOLDS
Using a precision straight edge and feeler gauge, measure the
warapage of the surface that is in contact with the cylinder
head.
Maximum warpage: 0.10 mm (0.0394 in.)
If warpage is greater than maximum, replace the manifold.

EM0L3±08
A03195
80 to 100°C
A05708
SST
A03197
Use STD Bushing size
10.285 to 10.306 Bushing bore diameter Both intake and exhaust(0.4049 to 0.4057)
Use O/S STD mm (in.)
(0.4069 to 0.4077)10.335 to 10.356
P21844
34.5 mm
(1.358 in.)
40.5 mm
(1.594 in.) Intake Exhaust EM±56
± ENGINE MECHANICALCYLINDER HEAD
2635 Author: Date:
2005 SEQUOIA (RM1146U)
REPLACEMENT
1. REPLACE VALVE GUIDE BUSHINGS
(a) Gradually heat the cylinder head to 80 to 100°C (176 to
212°F).
(b) Using SST and a hammer, tap out the guide bushing.
SST 09201±01055, 09950±70010 (09951±07100)
(c) Using a caliper gauge, measure the bushing bore diame-
ter of the cylinder head.
(d) Select a new guide bushing (STD or O/S 0.05).
If the bushing bore diameter of the cylinder head is greater than
10.306 mm (0.4057 in.), machine the bushing bore to the fol-
lowing dimension:
10.335 to 10.356 mm (0.4069 to 0.4077 in.)
If the bushing bore diameter of the cylinder head is greater than
10.356 mm (0.4077 in.), replace the cylinder head.
HINT:
Different the bushings are used for the intake and exhaust.
(e) Gradually heat the cylinder head to 80 to 100°C (176 to
212°F).

A05709
SST
A03199A03200
Sharp 5.5 mm Reamer
A04107
Pry
ClawBend
A04108
SST
SST Return
ClawDownward
± ENGINE MECHANICALCYLINDER HEAD
EM±57
2636 Author: Date:
2005 SEQUOIA (RM1146U)
(f) Using SST and a hammer, tap in a new guide bushing to
the specified protrusion height.
Protrusion height:
Intake9.2 to 9.8 mm (0.362 to 0.386 in.)
Exhaust8.2 to 8.8 mm (0.323 to 0.346 in.)
SST 09201±01055, 09950±70010 (09951±07100)
(g) Using a sharp 5.5 mm reamer, ream the guide bushing
to obtain the standard specified clearance (see page
EM±46) between the guide bushing and valve stem.
2. REPLACE SPARK PLUG TUBE GASKETS
(a) Bend the 4 ventilation case claws installed on the cylinder
head cover to an angle of 90° or more.
(b) Using a screwdriver, pry out the gasket.
NOTICE:
Be careful not to damage the cylinder head cover. Tape the
screwdriver tip.
(c) Using SST and a hammer, tap in a new gasket until its sur-
face is flush with the upper edge of the cylinder head cov-
er.
SST 09950±60010 (09951±00240, 09951±00440,
09952±06010), 09950±70010 (09951±07100)
NOTICE:
Be careful of the installation direction.
(d) Apply a light coat of MP grease to the gasket lip.
(e) Return the 4 ventilation case claws to its original position.

EM0L4±09
P08885
Adhesive
15 mm (0.59 in.)
A03212
Protrusion
A05710
SST
A05711
(1)(2)(3)(4)
EM±58
± ENGINE MECHANICALCYLINDER HEAD
2637 Author: Date:
2005 SEQUOIA (RM1146U)
REASSEMBLY
HINT:

Thoroughly clean all parts to be assembled.

Before installing the parts, apply fresh engine oil to all slid-
ing and rotating surfaces.

Replace all gaskets and oil seals with new ones.
1. INSTALL SPARK PLUG TUBES
HINT:
When using a new cylinder head, spark plug tubes must be
installed.
(a) Apply adhesive to the end of the spark plug tube.
Adhesive:
Part No. 08833±00070, THREE BOND 1324
or equivalent
(b) Using a wooden block and hammer, tap in a new spark
tube until there is 40.9 ± 42.1 mm (1.610 ± 1.658 in.) pro-
truding from the camshaft bearing cap installation surface
of the cylinder head.
NOTICE:
Avoid tapping a new spark plug tube too far for measuring
the amount of the protrusion while tapping.
2. INSTALL VALVES
(a) Using SST, push in a new oil seal.
SST 09201±41020
(b) Install the valve (1), spring seat (2), valve spring (3) and
spring retainer (4).

A05712SST
A07306
Vinyl Tape
± ENGINE MECHANICALCYLINDER HEAD
EM±59
2638 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Using SST, compress the valve spring and place the 2
keepers around the valve stem.
SST 09202±70020 (09202±00010)
(d) Using a plastic±faced hammer and the valve stem (not in
use) tip wound with vinyl tape, lightly tap the valve stem
tip to assure proper fit.
NOTICE:
Be careful not to damage the valve stem tip.
3. INSTALL SHIMS AND VALVE LIFTERS
(a) Install the shim and valve lifter.
(b) Check that the valve lifter rotates smoothly by hand.

A23349
EM1X2±01
A23344
A23351
A23350
A23345
EM±60
± ENGINE MECHANICALCYLINDER HEAD
2639 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
1. INSTALL RH EXHAUST MANIFOLD TO CYLINDER
HEAD
(a) Place a new gasket on the cylinder head.
(b) Install the exhaust manifold with 8 new nuts. Uniformly
tighten the nuts in several steps.
Torque: 44 N´m (450 kgf´cm, 32 ft´lbf)
(c) Install the heat insulator with the 4 bolts.
Torque: 7.5 N´m (76 kgf´cm, 66 in.´lbf)
2. INSTALL LH EXHAUST MANIFOLD TO CYLINDER
HEAD
(a) Place a new gasket on the cylinder head.
(b) Install the exhaust manifold with 8 new nuts. Uniformly
tighten the nuts in several steps.
Torque: 44 N´m (450 kgf´cm, 32 ft´lbf)

A23352
A05563
RH Cylinder Head
LH Cylinder Head 2UR
2UL
B02642B02644A04229
RH Bank
LH Bank
1 79
4
6
5
3
10
8
27
96
5
3
10
8
2
1
4
± ENGINE MECHANICALCYLINDER HEAD
EM±61
2640 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Install the heat insulator with the 4 bolts.
Torque: 7.5 N´m (76 kgf´cm, 66 in.´lbf)
3. PLACE CYLINDER HEADS ON CYLINDER BLOCK
(a) Place 2 new cylinder head gaskets in the positions on the
cylinder block.
HINT:
On the rear side of the cylinder head gasket are marked to dis-
tinguish the LH and RH banks, a º2URº mark for the RH bank
and a º2ULº mark for the LH bank.
NOTICE:
Be careful of the installation direction.
(b) Place the 2 cylinder heads in the positions on the cylinder
head gaskets.
4. INSTALL CYLINDER HEAD BOLTS
HINT:

The cylinder head bolts are tightened in 2 progressive
steps (steps (c) and (e)).

If any cylinder head bolt is broken or deformed, replace
it.
(a) Apply a light coat of engine oil to the threads and under
the heads of the cylinder head bolts.
(b) Install the plate washer to the cylinder head bolt.
(c) Install and uniformly tighten the 10 cylinder head bolts on
one side of the cylinder head in several steps in the se-
quence shown, then perform the same procedure to the
other side as shown.
Torque: 40 N´m (408 kgf´cm, 30 ft´lbf)
If any of the cylinder head bolts does not meet the torque speci-
fication, replace the cylinder head bolt.

B02643
B02645A04230
RH Bank
LH BankPortion A
Portion A
A04093
Painted Mark
90°
90°
Front
A02888
Camshaft Gear Spring
Wave WasherCamshaft Sub±gear
A02861
EM±62
± ENGINE MECHANICALCYLINDER HEAD
2641 Author: Date:
2005 SEQUOIA (RM1146U)
NOTICE:
Do not drop the plate washer for cylinder head bolt into por-
tion A of the cylinder head. If dropped into portion A, the
plate washer will pass through the cylinder head and cylin-
der block into the oil pan.
(d) Mark the front of the cylinder head bolt with paint.
(e) Retighten the cylinder head bolts by 90° in the numerical
order shown.
(f) Check that the painted mark is now at a 90° angle to front.
5. INSTALL SPARK PLUGS
6. ASSEMBLE EXHAUST CAMSHAFT
(a) Install the camshaft gear spring, camshaft sub±gear and
wave washer.
HINT:
Attach the pin on the gear to the gear spring end.
(b) Using snap ring pliers, install the snap ring.

A02859
A02889
Service Bolt
SST
Sub Gear
Main Gear
Turn
A23353Front
A23343
5 mm Hexagon
Wrench SST
A03173
± ENGINE MECHANICALCYLINDER HEAD
EM±63
2642 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Mount the hexagon wrench head portion of the camshaft
in a vise.
NOTICE:
Be careful not to damage the camshaft.
(d) Using SST, align the holes of the camshaft main gear and
sub±gear by turning the camshaft sub±gear counter-
clockwise, and temporarily install a service bolt.
SST 09960±10010 (09962±01000, 09963±00500)
(e) Align the gear teeth of the main gear and sub±gear, and
tighten the service bolt.
7. INSTALL CAMSHAFT TIMING TUBE TO INTAKE CAM-
SHAFT
(a) Place a new oil seal to the timing tube.
NOTICE:
Be careful of the installation direction.
(b) Align the timing tube knock pin with the knock pin groove
of the drive gear, and temporarily install the drive gear
with the 4 bolts.
(c) Using SST and a 5 mm hexagon wrench, uniformly tight-
en the 4 bolts in several steps.
SST 09960±10010 (09962±01000, 09963±00500)
Torque: 7.5 N´m (76 kgf´cm, 66 in.´lbf)
NOTICE:
Be careful not to damage the timing tube.
(d) Mount the hexagon head portion of the camshaft in a vise.
NOTICE:
Be careful not to damage the camshaft.