The head bolt torque sequence for the Toyota 2.4L 2RZ engine is as follows:
1. 10 Nm (7 ft-lb)
2. 25 Nm (18 ft-lb)
3. 45 Nm (33 ft-lb)
4. 60 Nm (44 ft-lb)
Step 2: Tighten the head bolts in multiple stages.
To properly seat the head gasket, the head bolts must be tightened in multiple stages. The recommended tightening sequence is as follows:
1. Tighten the bolts to the first torque specification (10 Nm or 7 ft-lb).
2. Wait for 30 minutes.
3. Tighten the bolts to the second torque specification (25 Nm or 18 ft-lb).
4. Wait for 30 minutes.
5. Tighten the bolts to the third torque specification (45 Nm or 33 ft-lb).
6. Wait for 30 minutes.
7. Tighten the bolts to the final torque specification (60 Nm or 44 ft-lb).
Important note: Do not exceed the recommended torque specifications, as this can damage the head gasket or cylinder head.
