C27 and C32 Industrial and Petroleum Engines Caterpillar

Illustration 1	g01146165
(1) Exhaust manifold for the left bank of cylinders (2) Exhaust manifold for the right bank of cylinders (4) Expansion joint

Note: Apply 4C-5599 Anti-Seize Compound to the threads of the taperlock studs before assembly.

(3) Torque for two taperlock studs ... 35 ± 5 N·m (26 ± 4 lb ft)

(6) Torque for eight clamps ... 8.5 ± 1.0 N·m (75 ± 9 lb in)

Illustration 2	g01427068
Tightening sequence for exhaust manifold

Note: Use a centering tool in at least one oversize hole per manifold section in order to align the manifolds. Do not remove the centering tools until removal is required to tighten the locknuts.

Note: Apply 4C-5599 Anti-Seize Compound to the threads of the locknuts and the bearing surface of the locknuts and the spacers before assembly.

Use the following procedure to tighten the locknuts (5):

1. Tighten the locknut (7) through locknut (18) in a numerical sequence that is shown in Illustration 2 to 20 ± 3 N·m (15 ± 2 lb ft).

2. Again tighten the locknut (7) through locknut (18) in a numerical sequence that is shown in Illustration 2 to 38 ± 5 N·m (28 ± 4 lb ft).