Engine Torque Specifications

SPECIFICATIONS - TORQUE








CYLINDER HEAD BOLTS





The cylinder head bolts are tightened using a torque plus angle procedure. The bolts must 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 against the threads. If all the threads do not contact the scale the bolt must be replaced.





- Tighten the cylinder head bolts in the sequence shown.
- Using the 4 step torque-turn method, tighten according to the following torque values:
- Step 1: All to 61 Nm (45 ft. lbs.)
- Step 2: All to 88 Nm (65 ft. lbs.)
- Step 3: All (again) to 88 Nm (65 ft. lbs.)
- Step 4: + 90° Turn Do not use a torque wrench for this step.

- Bolt torque after 90° turn should be over 122 Nm (90 ft. lbs.) in the tightening direction. If not, replace the bolt.


INTAKE MANIFOLD

Lower Intake Manifold





- Gradually tighten in sequence shown until a torque of 28 Nm (250 in. lbs.) is obtained.

Upper Intake Manifold

- Tighten bolts gradually starting in the center working outward until a torque of 12 Nm (105 in. lbs.) is obtained.

MAIN BEARING CAPS

- The main bearing cap bolts (1) must be tightened in the proper sequence. First the inner main cap bolts, secondly the windage tray bolts, lastly the main cap tie (horizontal) bolts.
- Install the inside main bearing cap bolts and tighten to 20 Nm + 1/4 turn (15 ft. lbs. + 1/4 turn).
- Measure crankshaft end play. Procedures
- Install connecting rods and measure side clearance. Service and Repair
- Install windage tray. Lubricate bolts with engine oil. Finger tighten all bolts first, then tighten to 28 Nm + 90° turn (20 ft. lbs. + 90° turn) beginning with the inside bolts tightening outward.
- Install the main cap tie (horizontal) bolts and tighten to 28 Nm (250 in. lbs.).

EXHAUST MANIVERTER

Tighten bolts starting at the center working outward to 23 N.m (200 in. lbs.)