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 MANUALSCHEVROLET1999ASTRO VAN 2WD V6-4.3L VIN WREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTEMISSION CONTROL SYSTEMSEXHAUST GAS RECIRCULATIONEGR VALVESERVICE AND REPAIR
1999 Chevrolet Astro Van 2WD V6-4.3L VIN W
EGR Valve: Service and Repair
1999 Chevrolet Astro Van 2WD V6-4.3L VIN WSECTION Service and Repair
REMOVAL PROCEDURE
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the air cleaner assembly.
3. Move the air cleaner outlet duct aside.
IMPORTANT: Note the EGR valve facing before removing the EGR valve.
4. Disconnect the EGR valve harness connector.
5. Loosen the EGR flange bolts.
6. Remove the EGR valve and gasket.
INSTALLATION PROCEDURE
IMPORTANT: Ensure the EGR valve is oriented in the proper direction.
1. Place the EGR gasket between the EGR valve and the intake manifold EGR mounting location.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Insert the flange bolts through the EGR valve and gasket into the mounting holes.
Tighten
First tighten the bolts to 10 N.m (89 lb in), and then tighten the bolts to 25 N.m (18 lb ft).
3. Connect the EGR valve harness connector.
4. Install the air cleaner assembly.
5. Connect the negative battery cable.
CAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Remove the air cleaner assembly.
3. Move the air cleaner outlet duct aside.
IMPORTANT: Note the EGR valve facing before removing the EGR valve.
4. Disconnect the EGR valve harness connector.
5. Loosen the EGR flange bolts.
6. Remove the EGR valve and gasket.
INSTALLATION PROCEDURE
IMPORTANT: Ensure the EGR valve is oriented in the proper direction.
1. Place the EGR gasket between the EGR valve and the intake manifold EGR mounting location.
NOTE: Refer to Fastener Notice in Service Precautions.
2. Insert the flange bolts through the EGR valve and gasket into the mounting holes.
Tighten
First tighten the bolts to 10 N.m (89 lb in), and then tighten the bolts to 25 N.m (18 lb ft).
3. Connect the EGR valve harness connector.
4. Install the air cleaner assembly.
5. Connect the negative battery cable.
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.