coolant AUDI A4 1997 B5 / 1.G APB Engine Cooling System Components
[x] Cancel search | Manufacturer: AUDI, Model Year: 1997, Model line: A4, Model: AUDI A4 1997 B5 / 1.GPages: 34, PDF Size: 0.64 MB
Page 26 of 34
19-24
- Loosen bleeder screw on rear coolant line -arrow- below expansion
tank.
- Fill up coolant until it comes out at bleeder screw.
- Screw in bleeder screw (20 Nm).
- Loosen bleeder screw on front coolant line -arrow- between power
steering pump and left cylinder head.
- Fill with coolant until it comes out at bleeder screw.
- Screw in bleeder screw (20 Nm).
- Fill coolant up to max. mark.
- Close filler cap on expansion tank.
- Set heater controls to maximum heat setting.
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Page 27 of 34
19-25
- Start engine and let it idle for about 10
minutes.
- Maintain an engine speed of about 2000 RPM
for about 5 minutes.
- Allow engine to run at idling speed until bottom
hose on radiator becomes hot.
- Check coolant level and top up if necessary.
When engine is at normal operating temperature
coolant level must be on max. mark, and
between min. and max. marks when engine is
cold.
Note:
When the engine is hot the cooling system is
under pressure. Carefully open filler cap on
expansion tank to release pressure before
starting repair work.
WARNING!
Hot steam can escape from the expansion
tank when the filler cap is opened. Cover the
filler cap with a cloth and remove it carefully.
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Page 28 of 34
19-26
Radiator, removing and installing
Removing
- Remove front bumper.
Repair Manual, Body Exterior, Repair Group
63
- Drain coolant Page 19
-19
.
- Disengage retaining clips on connecting flanges -arrow- and pull
coolant hoses off radiator.
- Unplug connector from thermoswitch on radiator (bottom left).
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Page 30 of 34
19-28
Installing
Install in the opposite order to removing. When installing, note the
following points:
Tightening torques - Release two retaining pins for radiator and pull out upward -arrows-.
- Pivot radiator toward front and lift out.
- Fill with coolant Page 19
-19
.
Component
Nm
Condenser to radiator 10
Cooling lines to radiator 10
Pressurizing fan to radiator 10
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Page 31 of 34
19-29
Coolant pump, removing and installing
Notes:
Always replace seals and gaskets.
Cover toothed belt with a cloth to protect it from
coolant before removing coolant pump.
Removing
- Remove front bumper.
Repair Manual, Body Exterior, Repair Group
63
- Move lock carrier to service position.
Repair Manual, Body Exterior, Repair Group
50
- Remove ribbed belt Page 13
-1 .
- Remove toothed belt Page 13
-4 .
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Page 32 of 34
- Drain coolant Page 19
-19
.
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Page 33 of 34
19-30
- Remove following components before unbolting coolant pump:
1 - Tensioning roller for toothed belt: 20 Nm
2 - Idler wheel: 45 Nm
- Unbolt coolant pump from toothed belt guard -1- (2 nuts). Remove
securing bolts -2- (9 bolts) for coolant pump and remove coolant pump.
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Page 34 of 34
19-31
Installing
Install in the opposite order to removing. When
installing, note the following points:
- Remove residues of sealant on sealing surfaces
of coolant pump and cylinder block.
- Clean sealing surfaces; ensure that they are free
of oil and grease.
- Fit new gasket on coolant pump flange.
- Insert coolant pump into cylinder block and tighten all 9 securing bolts -
2-.
- Secure rear toothed belt guard at coolant pump housing -1-.
Tightening torque: 10 Nm.
- Install toothed belt Page 13
-4 .
- Install ribbed belt Page 13
-1 .
- Install toothed belt guard.
- Fill cooling system Page 19
-19
.
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e=re
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