seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

Removing heat exchanger > < Securing intake pipe
Dismantling and assembling heater unit
Dismantling and assembling heater unit
  Note
Components identified with * are checked by the self-diagnosis function.
   
1 - Water jacket cover
2 - Bolt M5×12
3 - Heat exchanger
q   Removing → Chapter
q   Note installation position → Fig..
q   Clean inside and outside with brass wire brush (spark plug brush).
4 - O-ring
q   Renew
q   Moisten with coolant additive G12 when installing.
5 - Seal
q   Always renew after dismantling.
6 - Combustion chamber
q   Clean inside and outside with brass wire brush (spark plug brush).
q   Combustion chambers for petrol and diesel are different.
7 - Combustion air blower cover
8 - Glow plug for heater -Q9-*
q   Removing → Chapter
q   Rated voltage: 8 volts
q   Clean glow plug with brass wire brush (spark plug brush).
q   Remove glow plug connection, remove and clean strainer.
q   6 Nm
q   Checking under rated voltage of 8 V
9 - Bolt M4×10
10 - Socket head screw M5×65
q   6 Nm
11 - Socket head screw M5×16
q   6 Nm
12 - Heater control unit -J162-*
q   Removing → Chapter
13 - Combustion air blower -V6-*
q   Replacing → Chapter.
q   Do not dismantle further
14 - Cover
15 - Wiring harness
Pin assignment:
t  Combustion air blower -V6-: chamber 14 - brown, chamber 13 - black.
t  Flame monitor -G64-: chamber 2 - brown, chamber 1 - blue.
t  Overheating sensor -G189-: chambers 5 + 6 - red.
t  Coolant temperature sender for heater -G241-: chambers 3 + 4 - blue.
t  Glow plug for heater -Q9-: chamber 9 - white, chamber 12 - brown.
16 - Seal
q   Always renew after dismantling.
17 - Flame monitor -G64-
q   Removing → Chapter
q   Checking → Chapter
18 - Glow plug connection
q   Clean strainer
19 - Water jacket
q   Clean inside and outside with brass wire brush (spark plug brush).
20 - Coolant temperature sender for heater -G241-
q   Removing → Chapter
q   Checking → Chapter
21 - Overheating sensor -G189-
q   Removing → Chapter
q   Checking → Chapter
22 - Spring
q   Do not bend further.
q   Renew if damaged.
23 - Screw M5×16

   
Heat exchanger installation position
–  Insert heat exchanger -2- into water jacket -1- until centring -arrows- engages.
–  Push heat exchanger tightly into seating.
  N82-0096

Removing heat exchanger > < Securing intake pipe