3408C, 3412C and 3412D High Performance Marine Engines Caterpillar

3408

One Piece Exhaust Manifold

Illustration 1	g00908388
Typical Example

Put 5P-3931 Anti-Seize Compound on the stud threads prior to assembly.

Use a centering tool in at least one oversize hole per manifold section in order to align the manifolds.

Use the procedure that follows to tighten the exhaust manifold on the cylinder head.

1. In a numerical sequence, tighten locknuts 1 through 8.

   Torque for locknuts ... 38 ± 5 N·m (28 ± 4 lb ft)

Two-Piece Exhaust Manifold

Illustration 2	g00908392
Typical Example

Coat female ends of manifold with oil.

Apply 2P-2333 Manifold Sealer to the outside diameter of the male ends of the manifold prior to assembly.

Put 5P-3931 Anti-Seize Compound on the stud threads prior to assembly.

Use a centering tool in at least one oversize hole per manifold section in order to align the manifolds.

Use the procedure that follows to tighten the exhaust manifold on the cylinder head.

1. In a numerical sequence, tighten locknuts 1 through 8.

   Torque for locknuts ... 20 ± 3 N·m (15 ± 2 lb ft)

2. In a numerical sequence, tighten locknuts 1 through 8 again.

   Torque for locknuts ... 38 ± 5 N·m (28 ± 4 lb ft)

Two-Piece Exhaust Manifold (Bellows Flange)

Illustration 3	g00908401
Typical Example

Put 5P-3931 Anti-Seize Compound on the stud threads prior to assembly.

Use a centering tool in at least one oversize hole per each manifold section in order to align the manifolds.

Use the procedure that follows to tighten the exhaust manifold on the cylinder head.

1. In a numerical sequence, tighten locknuts 1 through 8.

   Torque for locknuts ... 20 ± 3 N·m (15 ± 2 lb ft)

2. In a numerical sequence, tighten locknuts 1 through 8 again.

   Torque for locknuts ... 38 ± 5 N·m (28 ± 4 lb ft)

3412

Three-Piece Exhaust Manifold

Illustration 4	g00837694
Typical Example

Coat female ends of manifold with oil.

Apply 2P-2333 Manifold Sealer to the outside diameter of the male ends of the manifold prior to assembly.

Put 5P-3931 Anti-Seize Compound on the stud threads prior to assembly.

Use a centering tool in at least one oversize hole per manifold section in order to align the manifolds.

Use the procedure that follows to tighten the exhaust manifold on the cylinder head.

1. In a numerical sequence, tighten locknuts 1 through 12.

   Torque for locknuts ... 20 ± 3 N·m (15 ± 2 lb ft)

2. In a numerical sequence, tighten locknuts 1 through 12 again.

   Torque for locknuts ... 38 ± 5 N·m (28 ± 4 lb ft)

Three-Piece Exhaust Manifold (Bellows Flange)

Illustration 5	g00904207
Typical Example

Put 5P-3931 Anti-Seize Compound on the stud threads prior to assembly.

Use a centering tool in at least one oversize hole per manifold section in order to align the manifolds.

1. In a numerical sequence, tighten locknuts 1 through 12.

   Torque for locknuts ... 20 ± 3 N·m (15 ± 2 lb ft)

2. In a numerical sequence, tighten locknuts 1 through 12 again.

   Torque for locknuts ... 38 ± 5 N·m (28 ± 4 lb ft)