16
The evaporative type combustion
chamber is used for creating and
burning the air-fuel mixture
Symptoms of combustion chamber
faults are: a failure to start the heater
(provided other parts are fault-free),
a burnt out housing or inner parts of
the chamber.
A faulty combustion chamber must be
replaced. Dismount the combustion
chamber in the following order:
• Remove the heater from
the vehicle
• Disconnect the air blower socket
• Remove the control unit (see 5.5)
• Remove the screws fastening
the air blower to the air
blower housing
• Dismount the air blower
• Unscrew the plug
• Remove the screws fastening the
combustion chamber cover to the
heating element
• Remove the combustion
chamber cover
• Remove the combustion chamber
xing screws
• Remove the combustion chamber.
Reinstall the combustion chamber in
the reverse order.
While replacing the combustion
chamber, inspect the heat exchanger.
Heat exchanger faults include a loss
of heat conductivity, an increased
temperature of exhaust gases
(> 500ºС), burnt-out heat exchang-
er walls. Such faults are caused by
deposits of fuel combustion products
(soot) onto the inner walls and ns
of the heat exchanger as a result of
using low quality fuel.
After removing the combustion
chamber, clear the inner part of the
heat exchanger of burnt deposits and
soot (if any).
5.7 Purpose, Dismounting, and Replacement of the Combustion
Chamber
Fig. 10. Combustion Chamber