Cooling System Components, Removing and Installing
Cooling system components, removing and installingWARNING!
When the engine is hot, the cooling system is under pressure. The hot coolant may escape and cause scalding injuries if the system is opened too quickly.
If necessary, open the cooling system carefully in order to slowly relieve the pressure and avoid scalding.
Notes:
- Hose connections are secured with spring-type or screw-type clamps.
- Use clamp pliers, Hazet 798-5 or equivalent, to remove and install spring-type clamps.
- During repairs, spring-type clamps may be replaced with screw-type clamps.
Draining/filling procedures and engine coolant specifications
For leak tests of cooling system use VAG 1274 cooling system tester and VAG 1274/3 adapter.
Cooling system components, body side
1 - Radiator
- Removing and installing Service and Repair
- After replacing radiator, replace all engine coolant
2 - V-belt
- Drives auxiliary tan -5-
- Only with optional equipment
3 - Guide ring
- Note fitting position
- Fastened with clips to lock carrier (radiator support) -6-
4 - Radiator fan
- Removing and installing
5 - Auxiliary fan
- Only with optional equipment
- Removing and installing
6 - Lock carrier
7 - Upper coolant hose
- To flange, Item 18
8 - Lower coolant hose
- To flange, Item 12
9 - 0 Nm (7 ft lb.)
10 - Harness connector
11 - Cover
12 - Expansion tank
13 - To coolant pipe, Item 8
14 - To connection, Item 11
15 - Cap
- Check with V.A.G 1274 cooling system tester and 1274/4 adapter
- Opening pressure 1.3 to 1.5 bar (19 to 23 psi)
16 - Coolant Fan Control (FC) Thermal Switch (F18)
- Tightening torque 35 Nm (26 ft. lb)
- Additional with optional equipment only:
Third Speed Coolant Fan Control (FC)
Thermal Switch -F165-, Item 2
Switching temperatures, 1st stage:
- ON: 92 to 97 °C (197 to 206 °F)
- OFF: 84 to 91° C (183 to 195 °F)
Switching temperatures, 2nd stage:
- ON: 99 to 105 °C (210to221 °F)
- OFF: 91 to 98 °C (195t0208 °F)
Cooling system components, engine side
1 - Retainer
2 - Third Speed Coolant Fan Control (FC) Thermal Switch (F165)
- For electric fan stage 3
- Only with optional equipment
Switching temperatures:
- ON: 11O to 115 °C (23O to 239 °F)
- OFF: lO5 to 11O °C (221 to 230 °F)
3 - 0 ring
- Always replace 4-10 Nm (7 ft lb)
5 - Engine Coolant Temperature (ECT) Sensor -G62-
6 - To heater core
7 - From heater core
8 - From expansion tank, Item 13
9 - Bracket
10 - Coolant pipe
11 - From expansion tank, Item 14
12 - From radiator lower, Item 8
13 - 20 Nm (15 ft lb) plus additional 1/4 turn (90°)
- Always replace 14-30 Nm
15 - Bracket
- For Generator (GEN)
16 - Poly-ribbed belt
- Removing, installing and adjusting belt Page 13-11
- Adjusting V-belt tension -
17 - Coolant pump
- Disassembling/assembling
18 - To upper radiator, Item 7