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 MANUALSCHEVROLET1997ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER HEAD ASSEMBLYSYSTEM SPECIFICATIONSINTAKE MANIFOLD TORQUE & SEQUENCE
1997 Chevrolet Astro Van 2WD V6-4.3L VIN W
Intake Manifold Torque & Sequence
1997 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Intake Manifold Torque & Sequence
TIGHTENING SEQUENCE/SPECIFICATIONS
Lower Intake Manifold Bolts:
First Pass 3 Nm (27 inch lbs.)
Second Pass 12 Nm (106 inch lbs.)
Final Pass 15 Nm (11 ft. lbs.)
Upper Intake Manifold Bolts and Studs:
First Pass 5 Nm (44 inch lbs.)
Final Pass 10 Nm (88 inch lbs.)
DIMENSIONS
Surface Flatness (Maximum) 0.254 mm (0.010 inch)
Lower Intake Manifold Bolts:
First Pass 3 Nm (27 inch lbs.)
Second Pass 12 Nm (106 inch lbs.)
Final Pass 15 Nm (11 ft. lbs.)
Upper Intake Manifold Bolts and Studs:
First Pass 5 Nm (44 inch lbs.)
Final Pass 10 Nm (88 inch lbs.)
DIMENSIONS
Surface Flatness (Maximum) 0.254 mm (0.010 inch)
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.