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| Volvo Engine >> CYLINDER HEAD TORQUE ON D24 DIESEL ENGINES
Cylinder Head Torque Procedure On
Volvo D24 Diesel Engines
Whenever the cylinder head gasket is replaced on the subject engines, it is important to follow a three state torquing procedure to properly seat the head.
To torque ALL the head bolts, it is necessary to remove the vacuum pump and plunger before starting the retorquing procedure.
With the engine cold, follow the bolt sequence shown below.
Stage 1 - Torque the bolts to 40 N·m (30 ft. lbs.)
Stage 2 - Torque the bolts to 70 N·m (52 ft. lbs.)
Stage 3 - Torque the bolts to 90 N·m (66 ft. lbs.)
Start the engine and allow it to reach operating temperature, then retorque to 85 N·m (62 ft. lbs.). Do not loosen the bolts before retorquing.
To complete the procedure, the head bolts must be retorqued after 600 to 1200 miles again to 85 N·m (62 ft. lbs.).
The AERA Technical Committee
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