Cooling System
02
070
14
RG,RG34710,235 –19–17SEP02–1/2
Remove and Install Thermostat Housing
RG8239C –UN–05DEC97
Thermostat Housing Installed
RG8241 –UN–05DEC97
Thermostat Housing Removed
A—Cap Screws (3 Used)
B—Return Line
C—Outlet Adapter
Remove Thermostat Housing
1. Disconnect top liner cooling return line (B) from
thermostat housing.
2. Remove three cap screws (A) securing thermostat
housing to cylinder block.
3. Pull thermostat housing straight out from engine to free
housing from top liner cooling outlet adapter (C).
4. Loosen hose clamp and remove hose from housing
nipple.
5. Remove gasket and discard. Clean all gasket material
from mounting surfaces.
Install Thermostat Housing
1. Apply clean engine oil to top liner cooling outlet
adapter O-ring.
2. Position thermostat housing on engine using a new
gasket. Be sure housing is firmly seated on top liner
cooling adapter O-ring.
3. Install mounting cap screws and tighten to
specifications.
Specification
Thermostat Cover/Housing
Assembly-to-Block Cap Screws—
Torque 50 N•m (37 lb-ft).............................................................................
4. Connect top liner cooling return line and tighten
securely.
5. If removed, apply LOCTITE

592 Pipe Sealant with
TEFLON

(TY9480) to pipe plugs and temperature
sensor and tighten to the following specifications.
LOCTITE is a registered trademark of Loctite Corp.
TEFLON is a registered trademark of Du Pont Co.
CTM100 (06APR04)
02-070-14
P
OWER
T
ECH
10.5 L & 12.5 L Diesel Engines
040604
PN=298
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