MBE 900 – Section 10.8 EGR Coolant Return Tube

Section 10.8
EGR Coolant Return Tube

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Section 10.8.1
EGR Coolant Return Tube Removal

Remove the EGR coolant return tube as follows (see Figure "EGR Coolant Return Tube and Related Components" for component locations):‪

1. Coolant Return Tube‪	4. Hose‪
2. Thermostat Housing‪	5. Bolts‪
3. Clamp‪	6. Gasket‪

Figure 1. EGR Coolant Return Tube and Related Components

PERSONAL INJURY ‪
To avoid injury from scalding, drain the radiator when the engine and coolant are cool.‪

1. Drain the engine coolant.
2. Remove EGR delivery pipe. Refer to "10.9.1 EGR Delivery Pipe Removal" .
3. Remove the two bolts attaching the coolant return tube to the thermostat housing.
4. Loosen the hose clamp on the coolant hose.
5. Remove coolant return tube from the coolant hose and thermostat housing. Discard gasket.

Section 10.8.2
EGR Coolant Return Tube Installation

Install the EGR coolant return tube as follows (see Figure "EGR Coolant Return Tube and Related Components" for component locations):‪

1. Replace gasket and inspect the coolant hose for any damage. Replace hose if required. Install the coolant return tube to the coolant hose and at the thermostat housing.
2. Tighten the hose clamps on the coolant hose.
3. Install and tighten the two bolts attaching the coolant return tube to the thermostat housing. Tighten bolts to 31-35 N·m (23-26 lb·ft).
4. Install EGR delivery pipe. Refer to "10.9.2 EGR Delivery Pipe Installation" .
5. Fill engine with fresh coolant to required level.
6. Test engine for leaks, refer to "10.5.2.1 Testing Engine for Leaks" and perform the required steps.