2001 TOYOTA SEQUOIA TS pin

A04873
A04860
A04887
A04888
EM±108
± ENGINE MECHANICALCYLINDER BLOCK
2687 Author: Date:
2005 SEQUOIA (RM1146U)
26. REMOVE PISTON RINGS
(a) Using a piston ring expander, remove the 2 compression
rings.
(b) Remove the 2 side rails and oil ring by hand.
HINT:
Arrange the piston rings in correct order only.
27. DISCONNECT CONNECTING ROD FROM PISTON
(a) Using a small screwdriver, pry out the 2 snap rings.
(b) Gradually heat the piston to approx. 60°C (140°F).
(c) Using a plastic±faced hammer and brass bar, lightly tap
out the piston pin and pin and remove the connecting rod.
HINT:

The piston and pin are a matched set.

Arrange the pistons, pins, rings, connecting rods and
bearings in correct order.

A04877
A04878
A04879
A23367
Mark 1, 2 or 3 Mark 1, 2 or 3 LH Piston
RH Piston30.75 mmFront Mark
(1 Cavity)
Front Mark
(2 Cavities)
± ENGINE MECHANICALCYLINDER BLOCK
EM±111
2690 Author: Date:
2005 SEQUOIA (RM1146U)
3. CLEAN PISTON
(a) Using a gasket scraper, remove the carbon from the pis-
ton top.
(b) Using a groove cleaning tool or broken ring, clean the pis-
ton ring grooves.
(c) Using solvent and a brush, thoroughly clean the piston.
NOTICE:
Do not use a wire brush.
4. INSPECT PISTON AND CONNECTING ROD
(a) Inspect the piston oil clearance.
HINT:
There are 3 sizes of the standard piston diameter, marked º1º,
º2º and º3º accordingly. The mark is stamped on the piston top.
(1) 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.
Piston diameter:
STD Mark º1º93.902 to 93.935 mm (3.6969 to 3.6982 in.)STD Mark 1
Mark º2º
93.902 to 93.935 mm (3.6969 to 3.6982 in.)
93.912 to 93.940 mm (3.6973 to 3.6984 in.)Mark 2
Mark º3º
93.912 to 93.940 mm (3.6973 to 3.6984 in.)
93.920 to 93.950 mm (3.6976 to 3.6988 in.)
O/S 0.5094.402 to 94.450 mm (3.7166 to 3.7185 in.)
(2) Measure the cylinder bore diameter in the thrust
directions (see step 2 above).

A04872
105 mm
EM7639
A04048
60°C
Z14454
± ENGINE MECHANICALCYLINDER BLOCK
EM±113
2692 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Inspect the piston ring end gap.
(1) Insert the piston ring into the cylinder bore.
(2) Using a piston, push the piston ring a little to the bot-
tom of the ring travel, 105 mm (4.13 in.) from the top
of the cylinder block.
(3) Using a feeler gauge, measure the end gap.
Standard end gap:
No.10.300 to 0.400 mm (0.0118 to 0.0157 in.)
No.20.400 to 0.550 mm (0.0157 to 0.0217 in.)
Oil (Side rail)0.130 to 0.380 mm (0.0051 to 0.0150 in.)
Maximum end gap:
No.11.10 mm (0.0433 in.)
No.21.30 mm (0.0512 in.)
Oil (Side rail)0.90 mm (0.0354 in.)
If the end gap is greater than maximum, replace the piston ring.
If the end gap is greater than maximum, even with a new piston
ring, rebore all the 8 cylinders (See page EM±116) or replace
the cylinder block.
(d) Inspect the piston pin fit.
At 60°C (140°F), you should be able to push the piston
pin into the piston pin hole with your thumb.
(e) Using a rod aligner and feeler gauge, check the connect-
ing rod alignment.
(1) Check for bend.
Maximum bend:
0.05 mm (0.0020 in.) per 100 mm (3.94 in.)
If bend is greater than maximum, replace the connecting rod as-
sembly.

Z14455
EM6525
EM0227
A04223
Tension
Portion
EM±114
± ENGINE MECHANICALCYLINDER BLOCK
2693 Author: Date:
2005 SEQUOIA (RM1146U)
(2) Check for twist.
Maximum twist:
0.15 mm (0.0059 in.) per 100 mm (3.94 in.)
If twist is greater than maximum, replace the connecting rod as-
sembly.
(f) Inspect the piston pin oil clearance.
(1) Using a caliper gauge, measure the inside diameter
of the connecting rod bushing.
Bushing inside diameter:
22.005 to 22.014 mm (0.8663 to 0.8667 in.)
(2) Using a micrometer, measure the piston pin diame-
ter.
Piston pin diameter:
21.997 to 22.009 mm (0.8660 to 0.8664 in.)
(3) Subtract the piston pin diameter measurement from
the bushing inside diameter measurement.
Standard oil clearance:
0.005 to 0.011 mm (0.0002 to 0.0004 in.)
Maximum oil clearance: 0.05 mm (0.0020 in.)
If the oil clearance is greater than maximum, replace the bush-
ing. If necessary, replace the piston and piston pin as a set.
(g) Using vernier calipers, measure the tension portion of the
connecting rod bolt.
Standard diameter:
7.200 to 7.300 mm (0.2835 to 0.2874 in.)
Minimum diameter: 7.00 mm (0.2756 in.)
If the diameter is less than the minimum, replace the bolt.

A05121
A05854A05122A05169
± ENGINE MECHANICALCYLINDER BLOCK
EM±115
2694 Author: Date:
2005 SEQUOIA (RM1146U)
5. INSPECT CRANKSHAFT
(a) Inspect for circle runout.
(1) Place the crankshaft on V±blocks.
(2) Using a dial indicator, measure the circle runout at
the center journal.
Maximum circle runout: 0.04 mm (0.0016 in.)
If the circle runout is greater than maximum, replace the crank-
shaft.
(b) Inspect the main journals and crank pins.
(1) Using a micrometer, measure the diameter of each
main journal and crank pin.
Main journal diameter:
66.988 to 67.000 mm (2.6373 to 2.6378 in.)
Crank pin diameter:
51.982 to 52.000 mm (2.0465 to 2.0472 in.)
If the diameter is not as specified, check the oil clearance (See
page EM±101). If necessary, replace the crankshaft.
(2) Check each main journal and crank pin for taper
and out±of±round as shown.
Maximum taper and out±of±round:
0.02 mm (0.0008 in.)
If the taper and out±of±round is greater than maximum, replace
the crankshaft.

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.

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.