MBE 4000 – Section 4.6 EGR Thermostat Housing

Section 4.6
EGR Thermostat Housing

The thermostat for the EGR engine has the same removal, installation, and checking instructions as for the non-EGR engine (refer to "4.5 Thermostat" ), but the thermostat housing cover is different by design to accommodate the EGR modulated control valve mounting. See Figure "EGR Thermostat Housing Cover" .‪

1. EGR Modulated Valve Mounting Holes‪

2. Thermostat Housing Cover Mounting Holes‪

Figure 1. EGR Thermostat Housing Cover

Section 4.6.1
EGR Thermostat Housing Cover Removal

Remove the EGR thermostat housing cover as follows:‪

1. Remove the four bolts that attach the EGR modulated control valve to the housing cover and remove the valve.
2. Remove the three thermostat housing cover mounting bolts.
3. Remove the two bolts that attach the reed valve housing bracket to thermostat cover. Remove bracket.
4. Remove any other hose or fitting connections.

Section 4.6.2
EGR Thermostat Housing Cover Installation

Install the EGR thermostat housing cover as follows:‪

1. Attach the thermostat housing cover to the thermostat housing using the three mounting bolts. Install the first bolt where heavy arrow is pointing in graphic. See Figure "EGR Thermostat Housing Cover Installation" . Torque to 30 N·m (22 lb·ft).
   

   1. EGR Modulated Valve Mounting Holes‪

   2. Thermostat Housing Cover Mounting Holes‪

   Figure 2. EGR Thermostat Housing Cover Installation

2. Install EGR modulated valve to thermostat housing cover using four bolts.
3. Attach reed valve housing bracket to thermostat cover.
4. Install any other hose or fitting connections.