G 1500 1/2 Ton Van V6-4.3L VIN W (1997)
Intake Manifold: Service and Repair
Intake Manifold Removal
1. Remove the distributor. Mark the relationship of the distributor housing and the rotor for proper reassembly.
2. Drain the cooling system.
3. Disconnect the upper radiator hose at the thermostat housing.
4. Disconnect the heater hose at the lower intake manifold.
5. Remove the EGR valve.
6. Disconnect the coolant bypass hose.
7. Disconnect the fuel supply and the return lines at the rear of the lower intake manifold.
8. Disconnect the wiring harness and the brackets.
9. Disconnect the throttle cable, the cruise control cable (if equipped) and the bracket from the manifold.
10. Remove the transmission oil level indicator tube.
11. Remove the ignition coil and bracket.
12. Remove the EGR tube, the clamp, and the bolt.
13. Remove the PCV valve and the vacuum hoses.
14. Remove the air conditioning compressor, the bracket, and the accessory drive bracket.
15. Remove the generator bracket bolt next to the thermostat housing (if needed).
16. Remove the lower intake manifold bolts.
17. Remove the lower Intake manifold.
18. Clean the old pieces of gasket from the gasket surfaces.
19. Clean any excessive carbon buildup in the exhaust passages.
20. Clean the scale and the deposits from the coolant passages.
21. Clean the EGR passage of excessive carbon deposits.
22. Inspect the manifold for cracks, broken flanges, and gasket surface damage.
