Revised Rod Bolt Torque Specifications For GM Vortec V8 Engines - Engine Builder Magazine

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Revised Rod Bolt Torque Specifications For GM Vortec V8 Engines

Engine Builder
By Engine Builder
Published:

When working on Gen III and Gen IV Vortec 4.8L, 5.3L, 5.7L, 6.0L and
6.2L V8 engines you should follow a new connecting rod bolt torque
specification. The rod bolts should continue to be tightened using two
passes.

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The new specification calls for the second pass value to be increased from 75 to 85 degrees, following this procedure:

1. Tighten the connecting rod bolts a first pass to 15 ft.lbs. (20 Nm)

2. Tighten the connecting rod bolts a final pass to 85 degrees using the J 45059 Angle Meter.

Some or all of this information was provided by the Automotive
Parts Remanufacturers Association (APRA). For more information on
technical bulletins available through APRA call 703-968-2772 or visit www.AutoBulletins.com.

This 2001 GM 4.8L Vortec V8 LR4 engine uses a revised connecting rod bolt torque procedure.<br />

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