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 MANUALSTOYOTA2007HIGHLANDER 2WD V6-3.3L (3MZ-FE)REPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER HEAD ASSEMBLYSYSTEM SPECIFICATIONS
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)
System Specifications
2007 Toyota Highlander 2WD V6-3.3L (3MZ-FE)SECTION System Specifications
LEFT CYLINDER HEAD

Uniformly install and tighten the 8 cylinder head bolts in the sequence shown in the illustration (procedure "A").
Torque 54 Nm (550 kgf-cm, 40 ft. lbs.)

Mark the front side of each cylinder head bolt head with paint, as shown in the illustration.
Retighten the cylinder head bolts by 90° in the same sequence as above.
Check that each painted mark is now at a 90° angle to the front.

Using a socket hexagon wrench 8, install the hexagon bolt.
Torque 19 Nm (194 kgf-cm, 14 ft. lbs.)
RIGHT CYLINDER HEAD

Uniformly install and tighten the 8 cylinder head bolts in the sequence shown in the illustration (procedure "A").
Torque 54 Nm (550 kgf-cm, 40 ft. lbs.)

Mark the front side of each cylinder head bolt head with paint, as shown in the illustration.
Retighten the cylinder head bolts by 90° in the same sequence as above.
Check that each painted mark is now at a 90° angle to the front.

Using a socket hexagon wrench 8, install the hexagon bolt.
Torque 19 Nm (194 kgf-cm, 14 ft. lbs.)
INTAKE MANIFOLD

Install the intake manifold with the 9 bolts, 2 nuts and 2 washers. Uniformly tighten the bolts and nuts in the sequence shown in the illustration.
Torque 15 Nm (153 kgf-cm, 11 ft. lbs.)
CAMSHAFT BEARING CAP




Uniformly tighten the 10 bearing cap bolts in the sequence shown in the illustration.
Torque 16 Nm (163 kgf-cm, 12 ft. lbs.)
CAMSHAFT TIMING GEAR ASSEMBLY
Using a 46 mm socket wrench, install and tighten a lock nut by turning it counterclockwise
Torque: 150 Nm (1,530 kgf-cm, 111 ft. lbs.)
LEFT EXHAUST MANIFOLD

Tighten the 7 nuts in the sequence shown in the illustration
Step 1: Torque 49 Nm (500 kgf-cm, 36 ft. lbs.)
Step 2: Retighten nuts 1 and 2 as shown in the illustration
RIGHT EXHAUST MANIFOLD

Uniformly tighten the 6 nuts in the sequence shown in the illustration
Step 1: Torque 49 Nm (500 kgf-cm, 36 ft. lbs.)
Step 2: Retighten nuts 1 and 2 shown in the illustration
Uniformly install and tighten the 8 cylinder head bolts in the sequence shown in the illustration (procedure "A").
Torque 54 Nm (550 kgf-cm, 40 ft. lbs.)
Mark the front side of each cylinder head bolt head with paint, as shown in the illustration.
Retighten the cylinder head bolts by 90° in the same sequence as above.
Check that each painted mark is now at a 90° angle to the front.
Using a socket hexagon wrench 8, install the hexagon bolt.
Torque 19 Nm (194 kgf-cm, 14 ft. lbs.)
RIGHT CYLINDER HEAD
Uniformly install and tighten the 8 cylinder head bolts in the sequence shown in the illustration (procedure "A").
Torque 54 Nm (550 kgf-cm, 40 ft. lbs.)
Mark the front side of each cylinder head bolt head with paint, as shown in the illustration.
Retighten the cylinder head bolts by 90° in the same sequence as above.
Check that each painted mark is now at a 90° angle to the front.
Using a socket hexagon wrench 8, install the hexagon bolt.
Torque 19 Nm (194 kgf-cm, 14 ft. lbs.)
INTAKE MANIFOLD
Install the intake manifold with the 9 bolts, 2 nuts and 2 washers. Uniformly tighten the bolts and nuts in the sequence shown in the illustration.
Torque 15 Nm (153 kgf-cm, 11 ft. lbs.)
CAMSHAFT BEARING CAP
Uniformly tighten the 10 bearing cap bolts in the sequence shown in the illustration.
Torque 16 Nm (163 kgf-cm, 12 ft. lbs.)
CAMSHAFT TIMING GEAR ASSEMBLY
Using a 46 mm socket wrench, install and tighten a lock nut by turning it counterclockwise
Torque: 150 Nm (1,530 kgf-cm, 111 ft. lbs.)
LEFT EXHAUST MANIFOLD
Tighten the 7 nuts in the sequence shown in the illustration
Step 1: Torque 49 Nm (500 kgf-cm, 36 ft. lbs.)
Step 2: Retighten nuts 1 and 2 as shown in the illustration
RIGHT EXHAUST MANIFOLD
Uniformly tighten the 6 nuts in the sequence shown in the illustration
Step 1: Torque 49 Nm (500 kgf-cm, 36 ft. lbs.)
Step 2: Retighten nuts 1 and 2 shown in the illustration
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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.