ISC, ISCe, QSC8.3, ISL, ISLe3, ISLe4 and QSL9 Engines – 008-017   Coolant Vent Lines

This procedure applies to the QSL9 and QSC8.3 marine engines only.

WARNING  Coolant is toxic. Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

WARNING  Do not remove the pressure cap from a hot engine. Wait until the coolant temperature is below 50°C [120°F] before removing the pressure cap. Heated coolant spray or steam can cause personal injury.

CAUTION  Use caution when draining coolant that coolant is not spilled or drained into the bilge area. Do not pump the coolant overboard. If the coolant is not reused, it must be discarded in accordance with local environmental regulations.

• Drain the engine coolant. Refer to Procedure 008-018 (Cooling System) in Section 7.

Disconnect the exhaust manifold vent line from the expansion tank and the top of the exhaust manifold.

Disconnect the cylinder head vent line from the expansion tank and the top of the cylinder head.

Disconnect the turbocharger vent line from the top of the expansion tank.

Disconnect the turbocharger vent line from the top of the turbocharger.

If the engine is keel cooled, disconnect the vent line from the top of the expansion tank and the top of the thermostat housing.

Disconnect the vent line from the front of the expansion tank and the top of the exhaust manifold.

Disconnect the vent line from the front of the expansion tank and the top of the cylinder head.

Disconnect the vent line from the rear of the expansion tank and the turbocharger.

Connect the vent line at the top of the expansion tank and the top of the exhaust manifold.

Connect the vent line for the turbocharger at the top of the expansion tank.

Connect the vent line at the top of the expansion tank and the top of the cylinder head.

Connect the coolant vent line to the top of the turbocharger.

If the engine is keel cooled, connect the vent line from the top of the expansion tank and to the top of the thermostat housing.

Connect the vent line at the front of the expansion tank and the top of the exhaust manifold.

Connect the vent line at the front of the expansion tank and the top of the cylinder head.

Connect the vent line at the rear of the expansion tank and the turbocharger.

WARNING  Batteries can emit explosive gases. To reduce the possibility of personal injury, always ventilate the compartment before servicing the batteries. To reduce the possibility of arcing, remove the negative (-) battery cable first and attach the negative (-) battery cable last.

• Fill the cooling system. Refer to Procedure 008-018 (Cooling System) in Section 8.

Operate the engine and check for leaks.