SECTION 05: COOLING SYSTEM
6
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
FIGURE 9: COOLANT LINE AT THE RADIATOR OUTLET
FIGURE 10: COOLANT LINE AT PUMP INLET
3.2 CONSTANT-TORQUE HOSE CLAMPS ON
CHARGE AIR COOLER (CAC)
If for any reason such as an accident, hose
clamps need to be changed; install and tighten
hose clamps to
60 lbf-in
(dry) (Figure 11).
CAUTION
The hose clamps will break if over-tighten. Do
not over-tighten, especially during cold
weather when hose has contracted.
CAC HOSE CLAMPS TORQUE :
60 lbf-in
FIGURE 11: CHARGE AIR COOLER HOSE CLAMPS -
3.2.1 Maintenance
Since the constant-torque clamp automatically
adjusts to keep a consistent sealing pressure,
there is no need to torque again hose clamps on
a regular basis. During vehicle operation and
shutdown, the screw tip will adjust according to
the temperature and pressure changes.
Checking for proper torque should be done
at room temperature.
4. THERMOSTAT OPERATION
1. Drain the cooling system.
2. Remove the bolts, the thermostat housing
and the thermostat. Carefully clean the
thermostat seat and all cylinder head-to-
thermostat housing mating surfaces.
FIGURE 12: VOLVO D13 THERMOSTAT HOUSING
3. Install the new thermostat. Make sure that
the rubber seal remains properly seated.
4. Position the thermostat housing to the
cylinder head, install the bolts and torque-
tighten to 24 ± 4 Nm (18 ±3 ft-lb).
5. Install the rubber radiator hose to the
thermostat housing. Position the clamp and
tighten to secure.
6. Fill the system with the recommended
coolant.
7. Start the engine, check for leaks and proper
operation. After shutdown, replenish fluids as
necessary.
4.1 CHECKING THERMOSTAT
A function check must be carried out before
installing a new thermostat.
