Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2006SEQUOIA 4WD V8-4.7L (2UZ-FE)REPAIR AND DIAGNOSISENGINE, COOLING AND EXHAUSTENGINECYLINDER HEAD ASSEMBLYSERVICE AND REPAIRINSTALLATION
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)
Installation
2006 Toyota Sequoia 4WD V8-4.7L (2UZ-FE)SECTION Installation
CYLINDER HEAD
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 Nm (450 kgf-cm, 32 ft. lbs.)
c) Install the heat insulator with the 4 bolts.
Torque: 7.5 Nm (76 kgf-cm, 66 inch lbs.)
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 Nm (450 kgf-cm, 32 ft. lbs.)
c) Install the heat insulator with the 4 bolts.
Torque: 7.5 Nm (76 kgf-cm, 66 inch lbs.)
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 distinguish the LH and RH banks, a "2UR" mark for the RH bank and a "2UL" 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 3 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 sequence shown, then perform the same procedure to the other side as shown.
Torque: 40 Nm (408 kgf-cm, 30 ft. lbs.)
If any of the cylinder head bolts does not meet the torque specification, replace the cylinder head bolt.
NOTICE: Do not drop the plate washer for cylinder head bolt into portion A of the cylinder head. If dropped into portion A, the plate washer will pass through the cylinder head and cylinder 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) Retighten the cylinder head bolts by an additional 90°
g) Check that the painted mark is now at a 180° 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.
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 counterclockwise, 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 CAMSHAFT
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 tighten the 4 bolts in several steps.
SST 09960-10010 (09962-01000, 09963-00500)
Torque: 7.5 Nm (76 kgf-cm, 66 inch lbs.)
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.
e) Align the camshaft knock pin with the knock pin groove of the timing tube, and push the timing tube by hand until you it touches the bottom.
f) Using a 10 mm hexagon wrench, install the bolt.
Torque: 78 Nm (790 kgf-cm, 58 ft. lbs.)
g) Install the seal washer and screw plug.
Torque: 15 Nm (150 kgf-cm, 11 ft. lbs.)
8. INSTALL CAMSHAFTS
NOTICE: Since the thrust clearance of the camshaft is small, the camshaft must be kept level while it is being installed. If the camshaft is not kept level, the portion of the cylinder head receiving the shaft thrust may crack or be damaged, causing the camshaft to seize or break. To avoid this, the following steps should be carried out.
a) Set the crankshaft pulley position. Turn the pulley clockwise or counterclockwise, and align the timing mark of the crankshaft pulley 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 install the camshaft, causing damage. So always set the crankshaft pulley at the correct angle.
b) Install the LH camshafts.
1) Apply MP grease to the thrust portion of the intake and exhaust camshafts.
2) Align the timing marks (2-dot mark) of the camshaft drive and driven main gears, and place the intake and exhaust camshafts.
3) Apply seal packing to the camshaft housing plug.
^ Remove the old packing material (FIPG).
^ Apply seal packing to the housing plug.
Seal packing: Part No. 08826-00080 or equivalent
4) Install the camshaft housing plug to the cylinder head as shown in the illustration.
5) Install the strainer to the cylinder head.
NOTICE: Be careful of the installation direction.
6) Apply seal packing to the front bearing cap.
^ Remove any old packing material (FIPG) and be careful not to drop any oil on the contact surfaces of the bearing cap and cylinder head.
Using a razor blade and gasket scraper, remove all the old packing material (FIPG) from the gasket surfaces and groove.
Thoroughly clean all components to remove all the loose material.
Using a non-residue solvent, clean both sealing surfaces.
^ Apply seal packing to the bearing cap as shown in the illustration.
Install a nozzle that has been cut to a 1.5 mm (0.059 inch) opening.
Parts must be assembled within 5 minutes of application. Otherwise the material must be removed and reapplied.
Immediately remove the nozzle from the tube and reinstall cap.
Seal packing: Part No. 08826-00080 or equivalent
NOTICE: Do not apply seal packing to the front bearing cap grooves.
7) Install the front bearing cap.
HINT: Installing the front bearing cap will determine the thrust portion of the camshaft.
8) Install the other bearing caps in the sequence shown with the arrow mark facing forward.
9) Push in the camshaft oil seal.
COMPONENTS:
COMPONENTS:
COMPONENTS:
COMPONENTS:
COMPONENTS:
COMPONENTS:
COMPONENTS:
COMPONENTS:
COMPONENTS:
COMPONENTS:
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 Nm (450 kgf-cm, 32 ft. lbs.)
c) Install the heat insulator with the 4 bolts.
Torque: 7.5 Nm (76 kgf-cm, 66 inch lbs.)
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 Nm (450 kgf-cm, 32 ft. lbs.)
c) Install the heat insulator with the 4 bolts.
Torque: 7.5 Nm (76 kgf-cm, 66 inch lbs.)
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 distinguish the LH and RH banks, a "2UR" mark for the RH bank and a "2UL" 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 3 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 sequence shown, then perform the same procedure to the other side as shown.
Torque: 40 Nm (408 kgf-cm, 30 ft. lbs.)
If any of the cylinder head bolts does not meet the torque specification, replace the cylinder head bolt.
NOTICE: Do not drop the plate washer for cylinder head bolt into portion A of the cylinder head. If dropped into portion A, the plate washer will pass through the cylinder head and cylinder 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) Retighten the cylinder head bolts by an additional 90°
g) Check that the painted mark is now at a 180° 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.
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 counterclockwise, 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 CAMSHAFT
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 tighten the 4 bolts in several steps.
SST 09960-10010 (09962-01000, 09963-00500)
Torque: 7.5 Nm (76 kgf-cm, 66 inch lbs.)
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.
e) Align the camshaft knock pin with the knock pin groove of the timing tube, and push the timing tube by hand until you it touches the bottom.
f) Using a 10 mm hexagon wrench, install the bolt.
Torque: 78 Nm (790 kgf-cm, 58 ft. lbs.)
g) Install the seal washer and screw plug.
Torque: 15 Nm (150 kgf-cm, 11 ft. lbs.)
8. INSTALL CAMSHAFTS
NOTICE: Since the thrust clearance of the camshaft is small, the camshaft must be kept level while it is being installed. If the camshaft is not kept level, the portion of the cylinder head receiving the shaft thrust may crack or be damaged, causing the camshaft to seize or break. To avoid this, the following steps should be carried out.
a) Set the crankshaft pulley position. Turn the pulley clockwise or counterclockwise, and align the timing mark of the crankshaft pulley 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 install the camshaft, causing damage. So always set the crankshaft pulley at the correct angle.
b) Install the LH camshafts.
1) Apply MP grease to the thrust portion of the intake and exhaust camshafts.
2) Align the timing marks (2-dot mark) of the camshaft drive and driven main gears, and place the intake and exhaust camshafts.
3) Apply seal packing to the camshaft housing plug.
^ Remove the old packing material (FIPG).
^ Apply seal packing to the housing plug.
Seal packing: Part No. 08826-00080 or equivalent
4) Install the camshaft housing plug to the cylinder head as shown in the illustration.
5) Install the strainer to the cylinder head.
NOTICE: Be careful of the installation direction.
6) Apply seal packing to the front bearing cap.
^ Remove any old packing material (FIPG) and be careful not to drop any oil on the contact surfaces of the bearing cap and cylinder head.
Using a razor blade and gasket scraper, remove all the old packing material (FIPG) from the gasket surfaces and groove.
Thoroughly clean all components to remove all the loose material.
Using a non-residue solvent, clean both sealing surfaces.
^ Apply seal packing to the bearing cap as shown in the illustration.
Install a nozzle that has been cut to a 1.5 mm (0.059 inch) opening.
Parts must be assembled within 5 minutes of application. Otherwise the material must be removed and reapplied.
Immediately remove the nozzle from the tube and reinstall cap.
Seal packing: Part No. 08826-00080 or equivalent
NOTICE: Do not apply seal packing to the front bearing cap grooves.
7) Install the front bearing cap.
HINT: Installing the front bearing cap will determine the thrust portion of the camshaft.
8) Install the other bearing caps in the sequence shown with the arrow mark facing forward.
9) Push in the camshaft oil seal.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.