2001 TOYOTA SEQUOIA check engine

P20636
1.27 mm
Hexagon Wrench
A04454
1.27 mm
Hexagon Wrench
A23307Turn
A23308
A23306
SST
EM±26
± ENGINE MECHANICALTIMING BELT
2605 Author: Date:
2005 SEQUOIA (RM1146U)
15. SET TIMING BELT TENSIONER
(a) Using a press, slowly press in the push rod using 981 ±
9,807 N (100 ± 1,000 kgf, 220 ± 2,205 lbf) of pressure.
(b) Align the holes of the push rod and housing, and pass a
1.27 mm hexagon wrench through the holes to keep the
setting position of the push rod.
(c) Remove the belt tensioner from the press.
(d) Install the dust boot to the belt tensioner.
16. INSTALL TIMING BELT TENSIONER
(a) Temporarily install the belt tensioner with the 2 bolts.
(b) Alternately tighten the 2 bolts.
Torque: 26 N´m (270 kgf´cm, 19 ft´lbf)
(c) Using pliers, remove the 1.27 mm hexagon wrench from
the belt tensioner.
17. CHECK VALVE TIMING
(a) Temporarily install the crankshaft pulley bolt.
(b) Slowly turn the crankshaft pulley 2 revolutions from the
TDC to TDC.
NOTICE:
Always turn the crankshaft pulley clockwise.
(c) Check that each pulley aligns with the timing marks as
shown in the illustration.
If the timing marks do not align, remove the timing belt and rein-
stall it.
18. TIGHTEN CRANKSHAFT PULLEY BOLT
Using SST, install the pulley bolt.
SST 09213±70011 (90119±08216), 09330±00021
Torque: 245 N´m (2,500 kgf´cm, 181 ft´lbf)

A04331
A08934
EM±28
± ENGINE MECHANICALTIMING BELT
2607 Author: Date:
2005 SEQUOIA (RM1146U)
23. INSTALL LH NO.3 TIMING BELT COVER
(a) Install the oil cooler pipe with the bolt and nut.
(b) Run the camshaft position sensor wire through the LH
No.3 timing belt cover hole.
(c) Fit the LH No.3 timing belt cover, matching it with the fan
bracket.
(d) Install the LH No.3 timing belt cover with the 4 bolts and
nut.
Torque: 7.5 N´m (76 kgf´cm, 66 in.´lbf)
(e) Install the wire grommet to the LH No.3 timing belt cover.
(f) Install the camshaft position sensor connector to the con-
nector bracket.
(g) Connect the camshaft position sensor connector.
(h) Install the sensor wire to the wire clamp on the LH No.3
timing belt cover.
(i) Install the engine wire to the 2 wire clamps on the LH No.3
timing belt cover.
24. INSTALL DRIVE BELT IDLER PULLEY
Install the idler pulley and cover plate with the bolt.
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
25. INSTALL PS PUMP
Install the PS pump with the 3 bolts.
Torque: 17 N´m (175 kgf´cm, 13 ft´lbf)
26. INSTALL FAN PULLEY, FAN, FLUID COUPLING
AND DRIVE BELT
(a) Temporarily install the fan pulley, the fan, fluid coupling
assembly with the 4 nuts.
(b) Install the drive belt. (See page CH±16)
(c) Tighten the 4 nuts holding the fluid coupling to the fan
bracket.
Torque: 29 N´m (296kgf´cm, 21 ft´lbf)
27. INTAKE AIR CONNECTOR ASSEMBLY
28. INSTALL THROTTLE BODY COVER
29. INSTALL RADIATOR ASSEMBLY (See page CO±18)
30. FILL WITH ENGINE COOLANT
31. START ENGINE AND CHECK FOR LEAKS
32. RECHECK ENGINE COOLANT LEVEL
33. INSTALL ENGINE UNDER COVER

A04456
No.2 Idler
Pulley Bolt
Timing
Mark
Crankshaft
Pulley Bolt
A23334
Movement
(25°)
SSTOil Control Valve
Installation Hole
A23335Service Bolt
A23336
EM±40
± ENGINE MECHANICALCYLINDER HEAD
2619 Author: Date:
2005 SEQUOIA (RM1146U)
(a) Check the crankshaft pulley position.
Check that the timing mark of the crankshaft pulley is
aligned with the centers of the crankshaft pulley bolt and
idler pulley bolt.
NOTICE:
Having the crankshaft pulley at the wrong angle can cause
the piston head and valve head to come into contact with
each other when you remove the camshaft, causing dam-
age. So always set the crankshaft pulley at the correct
angle.
(b) Release the oil from the front bearing caps.
Using SST, rotate the camshaft timing tube from left to
right 2 to 3 times within its VVT±i range (25°) and use a
waste cloth to collect the oil from the camshaft timing oil
control valve installation hole.
SST 09960±10010 (09962±01000, 09963±00400)
NOTICE:
Approximately 20 cc (1.2 cu in.) of oil will be ejected. Take
care not to spill it.
(c) Remove the LH camshafts.
(1) Bring the service bolt hole of the sub±gear upward
by turning the hexagon head portion of the exhaust
camshaft with a wrench.
(2) Secure the sub±gear to the main gear with a service
bolt.
Recommended service bolt:
Thread diameter6 mm
Thread pitch1.0 mm
Bolt length16 to 20 mm (0.63 to 0.79 in.)
HINT:
When removing the camshaft, make sure that the torsional
spring force of the sub±gear has been eliminated by the above
operation.
(3) Align the timing mark (2±dot mark) of the camshaft
drive gear by turning the hexagon head portion of
the exhaust camshaft with a wrench.

A02871
A23344
A23345
EM±44
± ENGINE MECHANICALCYLINDER HEAD
2623 Author: Date:
2005 SEQUOIA (RM1146U)
(b) Lift the cylinder head from the dowels on the cylinder
block, and place the 2 cylinder heads on wooden blocks
on a bench.
HINT:
If the cylinder head is difficult to lift off, pry between the cylinder
head and cylinder block with a screwdriver.
NOTICE:

Be careful not to damage the contact surfaces of the
cylinder head and cylinder block.

The cylinder head should not be tilted so as to secure
the valve lifter. If the cylinder head is tilted, remove
the valve lifter and check that the adjusting shim is
set correctly.
29. REMOVE RH EXHAUST MANIFOLD FROM CYLINDER
HEAD
(a) Remove the 4 bolts and heat insulator.
(b) Remove the 8 nuts, exhaust manifold and gasket.
30. REMOVE LH EXHAUST MANIFOLD FROM CYLINDER
HEAD
(a) Remove the 4 bolts and heat insulator.
(b) Remove the 8 nuts, exhaust manifold and gasket.

EM6325
A05592
EM6327
A21018
50 mm
(1.96 in.) Measuring
Point
± ENGINE MECHANICALCYLINDER HEAD
EM±47
2626 Author: Date:
2005 SEQUOIA (RM1146U)
5. CLEAN CYLINDER HEAD
Using a soft brush and solvent, thoroughly clean the cylinder
head.
6. INSPECT FOR FLATNESS
Using a precision straight edge and feeler gauge, measure the
surfaces contacting the cylinder block and the manifolds for
warpage.
Maximum warpage: 0.10 mm (0.0039 in.)
If warpage is greater than maximum, replace the cylinder head.
7. INSPECT FOR CRACKS
Using a dye penetrate, check the combustion chamber, intake
ports, exhaust ports and cylinder block surface for cracks.
If cracked, replace the cylinder head.
8. INSPECT CYLINDER HEAD BOLT
Using vernier calipers, measure the thread outside diameter of
the cylinder head bolt.
Standard outside diameter:
9.810 to 9.960 mm (0.3862 to 0.3921 in.)
Minimum outside diameter: 9.70 mm (0.3819 in.)
If the diameter is less than minimum, replace the bolt.

EM0580
A04087A04091A04236
Z00052
Z00054
44.5° EM±48
± ENGINE MECHANICALCYLINDER HEAD
2627 Author: Date:
2005 SEQUOIA (RM1146U)
9. CLEAN VALVES
(a) Using a gasket scraper, chip off any carbon from the valve
head.
(b) Using a wire brush, thoroughly clean the valve.
10. INSPECT VALVE STEMS AND GUIDE BUSHINGS
(a) Using a caliper gauge, measure the inside diameter of the
guide bushing.
Bushing inside diameter:
5.510 to 5.530 mm (0.2169 to 0.2177 in.)
(b) Using a micrometer, measure the diameter of the valve
stem.
Valve stem diameter:
Intake5.470 to 5.485 mm (0.2154 to 0.2159 in.)
Exhaust5.465 to 5.480 mm (0.2152 to 0.2157 in.)
(c) Subtract the valve stem diameter measurement from the
guide bushing inside diameter measurement.
Standard oil clearance:
Intake0.025 to 0.060 mm (0.0010 to 0.0024 in.)
Exhaust0.030 to 0.065 mm (0.0012 to 0.0026 in.)
Maximum oil clearance:
Intake0.08 mm (0.0031 in.)
Exhaust0.10 mm (0.0039 in.)
If the clearance is greater than maximum, replace the valve and
guide bushing. (See page EM±56)
11. INSPECT AND GRIND VALVES
(a) Grind the valve enough to remove pits and carbon.
(b) Check that the valve is ground to the correct valve face
angle.
Valve face angle: 44.5°

EM0181
Margin Thickness
EM2534
Overall Length
EM0255
EM6330
45° Carbide Cutter
Z00055
Width
± ENGINE MECHANICALCYLINDER HEAD
EM±49
2628 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Check the valve head margin thickness.
Standard margin thickness: 1.0 mm (0.039 in.)
Minimum margin thickness: 0.5 mm (0.020 in.)
If the margin thickness is less than minimum, replace the valve.
(d) Check the valve overall length.
Standard overall length:
Intake95.05 mm (3.7421 in.)
Exhaust95.10 mm (3.7441 in.)
Minimum overall length:
Intake94.55 mm (3.7224 in.)
Exhaust94.60 mm (3.7244 in.)
If the overall length is less than minimum, replace the valve.
(e) Check the surface of the valve stem tip for wear.
If the valve stem tip is worn, resurface the tip with a grinder or
replace the valve.
NOTICE:
Do not grind off more than minimum.
12. INSPECT AND CLEAN VALVE SEATS
(a) Using a 45° carbide cutter, resurface the valve seats. Re-
move only metal enough to clean the seats.
(b) Check the valve seating position.
Apply a light coat of Prussian blue (or white lead) to the
valve face. Lightly press the valve against the seat. Do not
rotate the valve.

Z03988
45°30°
1.0 ± 1.4 mm
Z03989
60°45°
1.0 ± 1.4 mm
EM6331
EM0988
Deviation EM±50
± ENGINE MECHANICALCYLINDER HEAD
2629 Author: Date:
2005 SEQUOIA (RM1146U)
(c) Check the valve face and seat for the following:

If blue appears 360° around the face, the valve is
concentric. If not, replace the valve.

If blue appears 360° around the valve seat, the
guide and face are concentric. If not, resurface the
seat.

Check that the seat contact is in the middle of the
valve face with the following width:
1.0 to 1.4 mm (0.039 to 0.055 in.)
If not, correct the valve seats as follows:

If the seating is too high on the valve face, use 30°
and 45° cutters to correct the seat.

If the seating is too low on the valve face, use 60°
and 45° cutters to correct the seat.
(d) Hand±lap the valve and valve seat with an abrasive com-
pound.
(e) After hand±lapping, clean the valve and valve seat.
13. INSPECT VALVE SPRINGS
(a) Using a steel square, measure the deviation of the valve
spring.
Maximum deviation: 2.0 mm (0.079 in.)
If the deviation is greater than maximum, replace the valve
spring.