ELBOW-AIR INLET 3487878 - Caterpillar

Exhaust manifold tightening sequence.Procedure To Install New Gaskets
1. Install two new 7W1641 and four 7W1642 Exhaust Manifold Gaskets as shown in the illustration.2. Install bolts (A, B, C and D). Install the nuts on bolts (B). Finger tighten the bolts in letter sequence.3. Tighten eight bolts (B), that fasten the elbows (5) and (1) to the rear manifold (3) to a torque of 14 7 N m (10 5 lb ft).4. Tighten eight bolts (C), that fasten elbows (5) and (1) to manifolds (2) and (4), to a torque of 14 7 N m (10 5 lb ft).5. Tighten bolts (B) to a torque of 45 7 N m (32 5 lb ft).6. Tighten bolts (C) to a torque of 45 7 N m (32 5 lb ft).7. Tighten 16 bolts (A) to a torque of 45 7 N m (32 5 lb ft).8. Tighten two bolts (D), that fasten the rear manifold to the engine, to a torque of 100 15 N m (75 10 lb ft).