Step 1: Tighten the bolts in the following sequence:
1, 3, 5, 7, 9, 11
6, 8, 10, 12, 4, 2
Step 2: Tighten the bolts to the following torque specifications:
First Pass: 30 Nm (22 lb-ft)
Second Pass: 90 degrees
Third Pass: 90 degrees
Step 3: Allow the engine to cool completely before refilling the coolant system.