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.
1999 Saturn SC2 L4-1.9L DOHC VIN 7FACTORY OEM SERVICE PROCEDURE
Air Injection Hose/Tube: Service and Repair
REMOVAL
1. Remove nuts from combination valve studs.
2. Remove nuts from exhaust manifold studs.
3. Remove combination valve air pump solenoid assembly and gasket.
4. Remove air pipe.
INSTALLATION
IMPORTANT:
^ Installation steps must be performed in sequence.
^ Make sure gaskets are installed correctly or a leak will occur. If gaskets are removed from studs, replace with new gaskets.
1. Install air pipe onto exhaust manifold studs.
2. Install air pipe into rear air compressor bracket slot.
3. Install air pump solenoid/combination valve assembly studs into air compressor bracket through air pipe flange holes.
4. Install and torque nuts on combination valve studs.
Torque: 7 NM (62 in. lbs)
5. Install and torque nuts on exhaust manifold studs.
Torque: 7 NM (62 in. lbs)
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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