Engine Torque Specifications

SPECIFICATIONS - TORQUE










CONNECTING ROD BOLT REUSE

NOTE: The connecting rod bearing cap bolts must be examined before reuse. If the threads are necked down, the bolts must be replaced.

Check connecting rod bolts for necking by holding a scale or straight edge against the threads. If all threads do not contact the scale, the bolt must be replaced.

CYLINDER HEAD BOLT REUSE

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.

CYLINDER HEAD






Tighten the cylinder head bolts in the following sequence, 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

Upper Intake Manifold

Tighten bolts to 12 Nm (105 in.lbs.) starting in the center working outward in a cross sequence pattern.

Lower Intake Manifold





Install intake manifold bolts and gradually tighten in sequence shown until a torque of 28 Nm (250 in. lbs.) is obtained.

MAIN BEARING CAPS






- Install each main cap (1) and tighten bolts finger tight.The main bearing cap bolts (2) must be tightened in the proper sequence. First the inner main cap bolts (2), secondly the windage tray bolts, lastly the main cap tie (horizontal) bolts (6).
- Install the inside main bearing cap bolts (2) and tighten to 20 Nm + 1/4 turn (15 ft. lbs. + 1/4 turn).
- Measure crankshaft end play.
- Install connecting rods and measure side clearance.
- Install windage tray. Lubricate bolts with engine oil and tighten to 27 Nm + 1/4 turn (20 ft. lbs. + 1/4 turn).



- Install the main cap tie (horizontal) bolts and tighten to 28 Nm (250 in. lbs.).


EXHAUST MANIFOLD

Tighten 4 bolts starting at the center working outward to 23 N.m (200 in. lbs.).

WATER PUMP

Tighten bolts to 12 Nm (105 in. lbs).