3408 & 3412 INDUSTRIAL ENGINES Caterpillar


Exhaust Manifold

Usage:

Remove Exhaust Manifold


3412 Engine Shown


3408 Engine Shown

NOTE: Turbocharger return oil line (1) is routed behind the exhaust manifold on the 3408 engine.

1. Remove turbocharger return oil line (1).

NOTE: There is only one shield (2) on the 3408 engine.

2. Remove two shields (2) from exhaust manifold (3).

3. Remove clamp (4).

4. Remove nuts, spacers and brackets (5).

5. Remove exhaust manifold (3).

6. Remove the gaskets from the exhaust manifold or studs.

7. Separate section (6), sections (7) and section (8).

Install Exhaust Manifold


NOTICE

Make sure the 2P-2333 Manifold Sealer does not get on the inside of each manifold. Damage to the turbocharger could be the result if the manifold sealer gets on the impeller on the turbocharger.


1. Apply a thin coat of 2P-2333 Manifold Sealer to the O.D. of male end of the manifold sections (7) and section (8). Coat the female ends of the manifold with clean engine oil.

2. Connect sections (6), sections (7) and section (8).

3. Install 5P-3931 Anti-Seize Compound on the threads of studs (9).

4. Install the gaskets on the studs.

5. Install exhaust manifold (3).

6. Install nuts, spacers and brackets (5). Tighten the nuts to a torque of 38 ± 5 N·m (28 ± 4 lb ft).

7. Install clamp (4).

8. Install two shields (2) to exhaust manifold (3).

9. Using a new O-ring seal at the bottom and a new gasket at the top, install turbocharger return oil line (1).

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