Century V6-3100 3.1L VIN M SFI (1998)
9. Apply sealant, GM P/N 12345382 to the threads of the bolts.
10. Hand tighten the vertical lower intake manifold bolts.
Notice: An oil leak may result if the vertical bolts are not tightened before the diagonal bolts.
11. Hand tighten the diagonal lower intake manifold bolts.
12. Install the lower intake manifold bolts.
12.1.Tighten the vertical lower intake manifold bolts (1) to 13 Nm (115 inch lbs.).
12.2.Tighten the diagonal lower intake manifold bolts (2) to 13 Nm (115 inch lbs.).
13. Connect the thermostat bypass hose to the thermostat bypass pipe and lower intake manifold pipe.
14. Connect the radiator inlet hose to the engine.