KIT-CONTROL 3661882 - Caterpillar

Exhaust Manifold Bolt Tightening Procedure
This procedure does not apply to engines with water cooled exhaust manifolds.
Illustration 1. Typical 3114 Engine exhaust manifold. Bolt tightening sequence.
Illustration 2. Typical 3116 Engine exhaust manifold. Bolt tightening sequence.1. Apply a thin coat of 5P3931 Anti-Seize Compound to the threads of the exhaust manifold bolts.2. Tighten all the bolts in numerical sequence to a torque of 4 1 N m (35 9 lb in). See Illustrations 1 and 2.3. Tighten all the bolts again in numerical sequence to a torque of 45 5 N m (33 4 lb ft).4. Bend the lock tabs over the flats of the bolt heads. If necessary, tighten the bolt more until a flat on the bolt head lines up with a lock tab. For engines with water cooled manifolds, apply a thin coat of 5P3931 Anti-Seize Compound to the threads of the exhaust manifold bolts. Then tighten all the bolts to a torque of 55 10 N m (41 7 lb ft).