Engine Torque Specifications

SPECIFICATIONS - TORQUE






Cylinder Head

The cylinder head bolts should be examined BEFORE reuse. If the threads are necked down, the bolts must be replaced.
Necking can be checked by holding a scale or straight edge (2) against the threads. If all the threads do not contact the scale (2) the bolt should be replaced.






Tighten the cylinder head bolts 1-8 in the following sequence. Using the 4 step torque turn method, tighten according to the following values:
- Step 1: Bolts 1 - 8 to 61 Nm (45 ft. lbs.)
- Step 2: Bolts 1 - 8 to 88 Nm (65 ft. lbs.)
- Step 3: Bolts 1 - 8 (again) to 88 Nm (65 ft. lbs.)
- Step 4: Bolts 1 - 8 turn an additional 1/4 Turn. (Do not use a torque wrench for this step.)

NOTE: Bolt torque after 1/4 turn should be over 122 Nm (90 ft. lbs.). If not, replace the bolt.




Lower Intake Torque Sequence




Upper Intake Torque Sequence

Exhaust Manifold

Tighten all bolts to 23 Nm (200 in. lbs.)

Main Bearing Cap






Install each main cap and tighten bolts finger tight.
Tighten number 1, 3 and 4 main cap bolts to 41 Nm + 1/4 Turn (30 ft. lbs.+ 1/4 Turn).
Rotate the crankshaft until the number 6 piston is at TDC.
To ensure correct thrust bearing alignment the following procedure must be done:
Move crankshaft all the way to the rear of its travel.
Then, move crankshaft all the way to the front of its travel.
Wedge an appropriate tool between the rear of the cylinder block and rear crankshaft counterweight. This will hold the crankshaft in it's most forward position.
Tighten the #2 Thrust Bearing cap bolts to 41 Nm + 1/4 Turn (30 ft. lbs.+ 1/4 Turn). Remove the holding tool.