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 MANUALSCHEVROLET1997CHEVY EXPRESS G3500, VAN CARGO, 6.5 FREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 22 (ENGINE CONTROLS - REMOVAL, INSTALLATION & OVERHAUL - 4.3L)FUEL SYSTEMUPPER INTAKE MANIFOLD ASSEMBLY (CSI)DISASSEMBLY
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 F
Upper Intake Manifold Assembly (CSI): Disassembly
1997 Chevrolet Chevy Express G3500, Van Cargo, 6.5 FSECTION Disassembly
WARNING: This page is about a different variant/trim than selected.
- When cleaning or replacing upper manifold assembly, remove throttle cable bracket attaching bolts and bracket, throttle body assembly, MAP sensor, crankcase ventilation valve, purge solenoid and power brake booster vacuum pipe fitting.CAUTION: DO NOT soak upper manifold assembly in an immersion type cleaner or any cleaner containing MEK.
- Upper manifold assembly contains TP sensor, IAC valve and internal throttle shaft sealed ball bearings. These components MUST NOT be subjected to strong solvent or cleaner bath. Clean throttle bore and valve deposits with carburetor cleaner and a shop towel. Use care when cleaning gasket surfaces. Sharp tools may damage sealing surfaces.
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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.