HEAD 4T6889 - Caterpillar

Installation Procedure
Keep all parts clean from contaminants.Contaminants may cause rapid wear and shortened component life.
Use the following steps to install one section of the exhaust manifold for all G3500 Engines.
Illustration 1 g00585641
Typical example
Inspect the condition of the metal gaskets. Replace the gaskets, if necessary.
Install the metal gaskets on the cylinder head and between each section of the exhaust manifold.
Illustration 2 g00638469
Ensure that the exhaust manifold is installed in the correct direction. The word "FLOW" and an arrow is stamped on each of the sections. This arrow should face toward the turbocharger.
Position the exhaust manifold on the engine. Install four bolts (7) that hold the exhaust manifold to the engine.
Install four bolts (6) that hold each section of the exhaust manifold together. Tighten the bolts to a torque of 47 5 N m (35 4 lb ft). Note: Ensure that bellows (5) of the exhaust manifold are not damaged with any tools.
Tighten the bolts again to a torque of 47 5 N m (35 4 lb ft).
Repeat these steps for each section of the exhaust manifold that must be installed.
Illustration 3 g00585604
G3508 COSA Engines
Install the metal gaskets and position each section of the exhaust manifold on the engine.
Install four bolts (4) and the nuts. Tighten the bolts to a torque of 47 5 N m (35 4 lb ft). Note: Ensure that bellows (5) of the exhaust manifold are not damaged with any tools.
Tighten the bolts again to a torque of 47 5 N m (35 4 lb ft).
Illustration 4 g00585318
G3508 COSA Engines
Install the metal gaskets and position exhaust adapter (3) on the engine.
Install four bolts (2) and the nuts that hold exhaust adapter (3) to the mounting plate.
Install four bolts (1) and the nuts on the exhaust manifold.
Use the same torque procedure that is given above.
Illustration 5 g00586100
Wiring diagram for the exhaust heat shield that is on G3508 Engines with dual turbochargers
Install the long sections of the exhaust heat shield and wire the heat shield together. End By:
Install the exhaust bypass valve.
Install the turbocharger.
Install the exhaust elbow.