OEM 2006 Buick Lucerne Intake Manifold

2006 Buick Lucerne Intake Manifold Parts Questions & Experts Answers

• Q: How to replace the lower intake manifold on 2006 Buick Lucerne?

  A: Starting the lower Intake Manifold replacement process involves removing three components: upper Intake Manifold along with drive belt tensioner and generator rear brace bolt and nut and generator rear brace. Remove these parts in sequence: exhaust gas recirculation (EGR) valve outlet pipe bolt and nut followed by egr valve outlet pipe. Using hose clamp pliers (J38185) safely reposition the Thermostat Housing clamp afterward removing the radiator inlet hose from this location. The mechanic must follow this sequence: first remove the generator brace bracket bolts and bracket and spacer then continue with the lower Intake Manifold bolts to remove the manifold with its seals and gaskets. To replace the lower Intake Manifold you need to remove both the engine coolant temperature (ECT) sensor and the Thermostat Housing bolt together with stud and finally the Thermostat Housing with built-in Thermostat. Begin by installing the Thermostat and housing before securing the Thermostat Housing bolt/stud to 25 nm (18 ft. Lbs.) and placing the ect sensor which needs tightening to 23 nm (17 ft. Lbs.). Once you finish cleaning the lower Intake Manifold sealing surface you must apply sealer to the ends of Intake Manifold seals before installing them. Before installing the lower Intake Manifold bolts, use threadlock gm p/n 12345493 (Canadian P/N 10953488) or equivalent on lower intake bolt threads. Then tighten the intake bolts to 15 nm (11 ft. Lbs.). Replace the generator brace bracket along with its spacer but tighten the bolts to 50 nm (37 ft. Lbs.). After that secure the radiator inlet hose onto the Thermostat Housing by using the hose clamp pliers (J38185). To finish the hvac system installation, start with egr valve outlet pipe bolt installation followed by 25 nm (18 ft. Lbs.) torque tightening and continue with generator rear brace bolt installation at 50 nm (37 ft. Lbs.). The final step involves drive belt tensioner and upper Intake Manifold installation.