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 MANUALSLEXUS2006RX 400H AWD V6-3.3L (3MZ-FE) HYBRIDREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER HEAD ASSEMBLYSYSTEM SPECIFICATIONS
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) Hybrid
System Specifications
2006 Lexus RX 400h AWD V6-3.3L (3MZ-FE) HybridSECTION System Specifications
Cylinder Head Surface Variation
Maximum Warpage
Cylinder block surface 0.05 mm (0.0020 inch)
Intake manifold surface 0.10 mm (0.0039 inch)
Exhaust manifold surface 0.10 mm (0.0039 inch)
Cylinder Head Bolt Outside Diameter
Standard 8.95 to 9.05 mm (0.3524 to 0.3563 inch)
Minimum 8.75 mm (0.3445 inch)
Cylinder Head Bolts
First Pass 54 Nm (550 kgf-cm, 40 ft. lbs.)
Final Pass 90°
Camshaft Bearing Cap Bolts 16 Nm (163 kgf-cm, 12 ft. lbs.)
Intake Manifold Bolts & Nuts
First Pass 15 Nm (153 kgf-cm, 11 ft. lbs.)
Second Pass
Retighten water outlet bolts & nuts 15 Nm (153 kgf-cm, 11 ft. lbs.)
Final Pass
Ground cable & nut 8.4 Nm (86 kgf-cm, 74 inch lbs.)
Camshaft Main Gear & Sub-Gear 5.4 Nm (55 kgf-cm, 48 inch lbs.)
Camshaft VVT-i Gear New Lock Nut 150 Nm (1,530 kgf-cm, 111 ft. lbs.)
The lock nut has left-hand threads
Exhaust Manifold Bolts
First Pass 49 Nm (500 kgf-cm, 36 ft. lbs.)
Final Pass
Nuts 1 & 2 49 Nm (500 kgf-cm, 36 ft. lbs.)
Maximum Warpage
Cylinder block surface 0.05 mm (0.0020 inch)
Intake manifold surface 0.10 mm (0.0039 inch)
Exhaust manifold surface 0.10 mm (0.0039 inch)
Cylinder Head Bolt Outside Diameter
Standard 8.95 to 9.05 mm (0.3524 to 0.3563 inch)
Minimum 8.75 mm (0.3445 inch)
Cylinder Head Bolts
First Pass 54 Nm (550 kgf-cm, 40 ft. lbs.)
Final Pass 90°
Camshaft Bearing Cap Bolts 16 Nm (163 kgf-cm, 12 ft. lbs.)
Intake Manifold Bolts & Nuts
First Pass 15 Nm (153 kgf-cm, 11 ft. lbs.)
Second Pass
Retighten water outlet bolts & nuts 15 Nm (153 kgf-cm, 11 ft. lbs.)
Final Pass
Ground cable & nut 8.4 Nm (86 kgf-cm, 74 inch lbs.)
Camshaft Main Gear & Sub-Gear 5.4 Nm (55 kgf-cm, 48 inch lbs.)
Camshaft VVT-i Gear New Lock Nut 150 Nm (1,530 kgf-cm, 111 ft. lbs.)
The lock nut has left-hand threads
Exhaust Manifold Bolts
First Pass 49 Nm (500 kgf-cm, 36 ft. lbs.)
Final Pass
Nuts 1 & 2 49 Nm (500 kgf-cm, 36 ft. lbs.)
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.