3116 and 3126 Truck Engines Exhaust Manifold Remove and Install

Removal Procedure

Start By:

A.Remove the turbocharger. Refer to Disassembly and Assembly, “Turbocharger – Remove”.

1.Remove bolts (1), locks (3), exhaust manifold (2), and the gaskets from the cylinder head assembly.

Installation Procedure

Note: Apply Tooling (A) to the outside diameter of the male ends of exhaust manifold (2) if exhaust manifold (2) is disassembled. Assemble exhaust manifold (2) and remove the excess sealer from the joints.

1.Apply Tooling (B) to the threads of bolts (1). Position the gaskets and exhaust manifold (2) on the cylinder head assembly. Install locks (3) and bolts (1)

2.Tighten bolt (1) through bolt (12) in a numerical sequence. Tighten bolts to 4 ± 1 N·m (35 ± 9 lb in).
3.Tighten bolt (1) through bolt (12) in a numerical sequence 45 ± 5 N·m (33 ± 4 lb ft).
Note: Prior to starting or running the engine, allow the sealant in the exhaust manifold joints to air dry for 24 hours.

End By: Install the turbocharger. Refer to Disassembly and Assembly, “Turbocharger – Install”.

Typical Example Of A Three Piece Exhaust Manifold

1. Coat inside diameter of female ends of manifold with engine oil.

2. Apply a thin coat of 2P2333 Sealer to outside diameter of the male ends of manifold before assembly. Do not apply sealer at tip of male ends. Remove excess sealer from assembled joint.

3. Continue with procedure given for one piece exhaust manifold.

Assembly Procedure

Typical Example Of A One Piece Exhaust Manifold

(1) Apply 5P3931 Anti-Seize Compound to threads of bolts and tighten as follows:

a. Tighten bolts 1 thru 12 in numerical sequence to … 4 ± 1 N·m (35 ± 9 lb in)
b. Retighten bolts 1 thru 12 in numerical sequence to … 45 ± 5 N·m (33 ± 4 lb ft)
(2) Lock. Bend lock tabs over the flat of bolt heads.

(3) Tighten studs to a torque of … 35 ± 5 N·m (26 ± 4 lb ft)