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.
Upper Intake Manifold & CPI Assembly: Installation
1992 GMC Magnavan 5.7 KSECTION Installation
- To install, reverse removal procedure. Align CPI assembly grommet with casting grommet slots and push down on CPI until it is seated in bottom of guide hole. See Fig 1.
- Push poppet nozzles into casting sockets. Ensure poppet nozzles are firmly seated and locked in casting socket. Install fuel inlet and return lines. Lubricate NEW "O" rings with clean engine oil.
- Pressurize fuel system and check for fuel leak. Install upper intake manifold assembly. Tighten upper intake manifold bolts and nuts to 90 INCH lbs. (10 N.m) and in sequence. See Fig 2.
RENDER: 1.0x
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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.