2001 TOYOTA SEQUOIA engine

EM123±04
A23367
Size Mark LH Piston
RH PistonSize Mark
30.75 mmFront Mark
(1 Cavity)
Front Mark
(2 Cavities)
P20665
SST
P20666
Oil
Hole EM±116
± ENGINE MECHANICALCYLINDER BLOCK
2695 Author: Date:
2005 SEQUOIA (RM1146U)
REPLACEMENT
1. REPLACE OVERSIZED (O/S) PISTONS FOR CYL-
INDER BORING
HINT:

Bore all the 8 cylinders to match the oversized piston out-
side diameter.

Replace all the piston rings with ones to match the over-
sized pistons.
(a) Keep 8 new oversized pistons.
O/S 0.50 piston diameter:
94.402 to 94.430 mm (3.7166 to 3.7177 in.)
HINT:
The shape of the piston differs for the LH and RH banks. The
LH piston is marked with 1 cavity and º2º, the RH piston with 2
cavities and º2º.
(b) Using a micrometer, measure the piston diameter at right
angles to the piston pin center line, 30.75 mm (1.2106 in.)
from the piston head.
(c) Calculate the size to be rebored for each cylinder as fol-
lows:
Size to be rebored = P + C ± H
P = Piston diameter
C = Piston clearance:
0.030 to 0.071 mm (0.0012 to 0.0028 in.)
H = Allowance for honing: 0.02 mm (0.0008 in.) or less
(d) Bore and hone the cylinders to calculated dimensions.
Maximum honing: 0.02 mm (0.0008 in.)
NOTICE:
Excess honing will destroy the finished roundness.
2. REPLACE CONNECTING ROD BUSHINGS
(a) Using SST and a press, press out the bushing.
SST 09222±30010
(b) Align the oil holes of a new bushing and the connecting
rod.
(c) Using SST and a press, press in the bushing.
SST 09222±30010

P20667
P20668
A04868
A04867
SST
A04858Cut Position
± ENGINE MECHANICALCYLINDER BLOCK
EM±117
2696 Author: Date:
2005 SEQUOIA (RM1146U)
(d) Using a pin hole grinder, hone the bushing to obtain the
standard specified clearance (See page EM±101) be-
tween the bushing and piston pin.
(e) Check the piston pin fit at normal room temperature. Coat
the piston pin with engine oil, and push it into the connect-
ing rod with your thumb.
3. REPLACE CRANKSHAFT FRONT OIL SEAL (See
page LU±13)
4. REPLACE CRANKSHAFT REAR OIL SEAL
HINT:
There are 2 methods ((a) and (b)) to replace the oil seal.
(a) If the rear oil seal retainer is removed from the cylinder
block:
(1) Using a screwdriver and hammer, tap out the oil
seal.
(2) Using SST and a hammer, tap in a new oil seal until
its surface is flush with the rear oil seal retainer
edge.
SST 09223±56010
(3) Apply MP grease to the oil seal lip.
(b) If the rear oil seal retainer is installed to the cylinder block:
(1) Using a knife, cut off the oil seal lip.
(2) Using a screwdriver, pry out the oil seal.
NOTICE:
Be careful not to damage the crankshaft. Tape the screw-
driver tip.

A04859
SST
EM±118
± ENGINE MECHANICALCYLINDER BLOCK
2697 Author: Date:
2005 SEQUOIA (RM1146U)
(3) Apply MP grease to a new oil seal lip.
(4) Using SST and a hammer, tap in the oil seal until its
surface is flush with the rear oil seal retainer edge.
SST 09223±56010

EM124±07
A04861
A04876
60°C
A23369
Front Mark
(2 Cavities) Front
Mark
(1 Cavity)
Outside Mark LH Piston
RH Piston
Outside Mark
A04860
± ENGINE MECHANICALCYLINDER BLOCK
EM±119
2698 Author: Date:
2005 SEQUOIA (RM1146U)
REASSEMBLY
HINT:

Thoroughly clean all parts to be assembled.

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

Replace all gaskets, O±rings and oil seals with new ones.
1. ASSEMBLE PISTON AND CONNECTING ROD
(a) Using a screwdriver, install a new snap ring on one side
of the piston pin hole.
(b) Gradually heat the piston to about 60°C (140°F).
(c) Coat the piston pin with engine oil.
(d) Position the piston so that the front mark and to the out-
side mark on the connecting rod face in the same direc-
tion as shown in the illustration.
NOTICE:
The installation directions of the piston and connecting rod
are different for the LH and RH banks. The LH piston is
marked with 1 cavity and º2º, the RH piston with 2 cavities
and º2º.
(e) Align the piston pin holes of the piston and connecting
rod, and push in the piston pin with your thumb.
(f) Using a screwdriver, install a new snap ring on the other
side of the piston pin hole.

A21016
No.1
No.2
Code Mark 2R
A23370
Lower
Side
Rail
Front
Mark
(1 Cavity)
Upper Side Rail
No. 1 CompressionExpander LH PistonNo. 2 Compression
Lower
Side
Rail
Front
Mark
(2 Cavities)
Upper Side RailNo. 1 Compression No. 2 Compression RH Piston
Expander
45° 45° 45° 45°
60°
60°
60°
60°
EM6484
A04846
Upper
Lower
22.5 mm19.5 mm No.1 and No.5 Others
EM±120
± ENGINE MECHANICALCYLINDER BLOCK
2699 Author: Date:
2005 SEQUOIA (RM1146U)
2. INSTALL PISTON RINGS
(a) Install the oil ring expander and 2 side rails by hand.
(b) Using a piston ring expander, install the 2 compression
rings.
Code mark:
No.1None
No.22R
(c) Position the piston rings so that the ring ends are as
shown.
NOTICE:
Do not align the ring ends
.
3. INSTALL BEARINGS
(a) Align the bearing claw with the groove of the connecting
rod or connecting cap.
(b) Install the bearings in the connecting rod and connecting
rod cap.
4. INSTALL MAIN BEARINGS
HINT:

Main bearings are of 19.5 mm (0.768 in.) and 22.5 mm
(0.886 in.) in width. Install the 22.5 mm (0.886 in.) bear-
ings in the No.1 and No.5 cylinder block journal positions
with the main bearing cap. Install the 19.5 mm (0.768 in.)
bearings in the other positions.

Upper bearings have an oil groove and oil holes, but lower
bearings do not.

A04216
A04214
Mark
1, 2, 3, 4, or 5
A04215
A04217
A05091
± ENGINE MECHANICALCYLINDER BLOCK
EM±121
2700 Author: Date:
2005 SEQUOIA (RM1146U)
(a) Align the bearing claw with the claw groove of the cylinder
block, and push in the 5 upper bearings.
(b) Align the bearing claw with the claw groove of the main
bearing cap, and push in the 5 lower bearings.
HINT:
A number is marked on each main bearing cap to indicate the
installation position.
5. INSTALL UPPER THRUST WASHERS
Install the 2 thrust washers under the No.3 journal position of
the cylinder block with the oil grooves facing outward.
6. PLACE CRANKSHAFT ON CYLINDER BLOCK
7. PLACE MAIN BEARING CAPS AND LOWER THRUST
WASHERS ON CYLINDER BLOCK
(a) Install the 2 thrust washers on the No.3 bearing cap with
the grooves facing outward.
(b) Install the 5 main bearing caps in their proper locations.
8. INSTALL MAIN BEARING CAP BOLTS
HINT:

The main bearing cap bolts are tightened in 2 progressive
steps (steps (b) and (d)).

If any one of the main bearing cap bolts is broken or de-
formed, replace it.

A05095
1
248
6
3
5
9
7
10
A05094
Front
Painted
Mark90° 90°
A23371
Front Mark
(1 Cavity)
Front
LH
Piston
RH
PistonFront
Front Mark
(2 Cavities)
EM±122
± ENGINE MECHANICALCYLINDER BLOCK
2701 Author: Date:
2005 SEQUOIA (RM1146U)
(a) Apply a light coat of engine oil to the threads and under
the main bearing cap bolts.
(b) Install and uniformly tighten the 10 main bearing cap bolts
in several steps, in the sequence shown.
Torque: 27 N´m (275 kgf´cm, 20 ft´lbf)
If any of the main bearing cap bolts does not meet the torque
specification, replace the main bearing cap bolt.
(c) Mark the front of the main bearing cap bolt with paint.
(d) Retighten the main bearing cap bolts by 90° in the numer-
ical order shown.
(e) Check that the painted mark is now at a 90° angle to the
front.
(f) Check that the crankshaft turns smoothly.
9. CHECK CRANKSHAFT THRUST CLEARANCE
(See page EM±101)
10. INSTALL PISTON AND CONNECTING ROD AS-
SEMBLIES
Using a piston ring compressor, push correctly the numbered
piston and connecting rod assemblies into each cylinder with
the front mark of the piston facing forward.
NOTICE:
The shape of the piston differs for the LH and RH banks.
The LH piston is marked with 1 cavity and º2º, the RH pis-
ton with 2 cavities and º2º.

A05106
A05107A05108A05174
Front
Outside Mark
(Protrusion)
RH Bank LH Bank
Front
Outside Mark
(Protrusion)
A05101
A05099
Painted
Mark Front90°
90°
± ENGINE MECHANICALCYLINDER BLOCK
EM±123
2702 Author: Date:
2005 SEQUOIA (RM1146U)
11. PLACE CONNECTING ROD CAP ON CONNECTING
ROD
(a) Match the numbered connecting rod cap with the con-
necting rod.
(b) Align the pin groove of the connecting rod cap with the
pins of the connecting rod, and install the connecting rod
cap.
(c) Check that the outside mark of the connecting rod cap is
facing in correct direction.
12. INSTALL CONNECTING ROD CAP BOLTS
HINT:

The connecting rod cap bolts are tightened in 2 progres-
sive steps (steps (b) and (d)).

If any one of the connecting rod cap bolts is broken or de-
formed, replace it.
(a) Apply a light coat of engine oil on the threads and under
the heads of the connecting rod cap bolts.
(b) Install and alternately tighten the 2 connecting rod cap
bolts in several passes.
Torque: 24.5 N´m (250 kgf´cm, 18 ft´lbf)
If any one of the connecting rod cap bolts does not meet the
torque specification, replace the connecting rod cap bolts.
(c) Mark the front of the connecting cap bolt with paint.
(d) Retighten the cap bolts by 90° as shown.
(e) Check that the painted mark is now at a 90° angle to the
front.
(f) Check that the crankshaft turns smoothly.
13. CHECK CONNECTING ROD THRUST CLEARANCE
(See page EM±101)