RADIATOR AR 3843997 - Caterpillar

Removal Procedure
Start By:
Remove the turbocharger. Refer to Disassembly and Assembly, "Turbocharger - Remove" for the correct procedure.
Illustration 1 g02725206
Illustration 2 g02725251
Tighten sequence of exhaust manifold
Remove tube assembly (1). Refer to Disassembly and Assembly, "Air Control Valve - Remove and Install" for the correct procedure.
Loosen nuts (5) in reverse numerical order. Refer to Illustration 2. Note: Loosening the bolts in reverse numerical order will help prevent distortion of the exhaust manifold.
Remove nuts (5) and remove exhaust manifold (3) from the cylinder head.
Remove exhaust manifold gasket (6) (not shown).
If necessary, remove studs (2) from the exhaust manifold.
If necessary, remove studs (4) from the cylinder head. Installation Procedure
Ensure that the exhaust manifold is clean and free from damage. If necessary, replace the exhaust manifold. Clean the gasket surface of the cylinder head.
Illustration 3 g02725206
Illustration 4 g02725251
If necessary, install studs (2) to exhaust manifold (3). Tighten the stud to a torque of 18 N m (159 lb in).
Position a new exhaust manifold gasket (6) (not shown) onto studs (4). Note: Ensure that the exhaust manifold gasket is correctly oriented.
Position exhaust manifold (3) onto studs (4).
Install nuts (5) to studs (4) finger tight. Tighten the nuts in the sequence that is shown in Illustration 4 in two stages. Tighten the nuts to an initial torque of 10 N m (89 lb in).Tighten the nuts to a final torque of 27 N m (239 lb in).
Install tube assembly (1). Refer to Disassembly and Assembly, "Air Control Valve - Remove and Install" for the correct procedure. End By:
Install the turbocharger to the exhaust manifold. Refer to Disassembly and Assembly, "Turbocharger - Install" for the correct procedure.