coolant AUDI A4 1996 B5 / 1.G Engine Oil Level Checking Workshop Manual

14

Cooling system antifreeze protection
and coolant level, checking


CAUTION!

Part numbers are for reference only. Always
check with your Parts Dept. for the latest
parts information.
Coolant antifreeze, Part No. G 11 prevents frost
and corrosion damage, lime deposits, and also
raises the boiling temperature. Cooling system
must be filled year round with antifreeze and
corrosion protection agent.
Concentration of coolant must not be reduced by
adding wa ter, even during summer or in warmer
climates. Coolant antifreeze percentage must be
at least 40%.
Because of its high boiling point, coolant
contributes to safe operation at high engine load,
especially in warmer climates.

- Check concentration of coolant antifreeze.

Antifreeze protection must be approximately
-25 C (-13 F) for US and -35 C (-31 F)
for Canada.

For antifreeze protection down to
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approximately -40 C (-40 F), the
percentage of G 11 may be increased up to
60%. The percentage of G 11 must not
exceed 60%, higher amounts will decrease
frost protection and cooling capacity.

If antifreeze protection is not adequate, drain
off quantity indicated in following table and
top off with coolant antifreeze G 11.
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-35 (-31)
-40 (-40 )

- After road test, check coolant concentration.

- Check coolant level.
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16

Delivery inspection:
At delivery inspection coolant level must be at
max. mark on expansion tank (engine cold).

Inspection service:
Coolant level between min. and max. markings.
With engine cold, coolant level must be between
min. and max. markings of reservoir; with engine
warm, level may be slightly above max. marking.
If coolant level is too low but antifreeze protection
is adequate, add required amount of mixture.
If coolant level is too low but antifreeze protection
adequate, add missing quantity according to
following mixing ratios:

Antifreeze
protection down to Coolant
additive Water
-25 C (-13 F)
approx. 40 % approx. 60
%
-35 C (-31 F) approx. 50 % approx. 50
%
-40 C (-40 F) approx. 50 % approx. 50
%
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29


Installing
Installation is in the reverse order of removal. Also, note the following: - Remove V-belt pulley from coolant pump. Counterhold by inserting pin
(arrow) in pump pulley.
- Remove V-belt.
- Install V-belt on pulleys and assemble two sections of pulley on coolant
pump without tightening bolts.
- Tighten bolts securing two sections of pulley in stages while turning
coolant pump.
As bolts are tightened, V-belt should gradually move outward until
seated on running surface.
- Tighten bolts to 25 Nm.
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Note:
It is not possible to adjust the tension of the V-
belt for the coolant pump.

- Tighten viscous fan mounting to 45 Nm.

- Install ribbed belt over crankshaft pulley, viscous
fan pulley and power steering pump pulley. If
necessary, pull belt upward using a suitable tool.

Vehicles with air conditioner - Turn ribbed belt tensioning element in direction of arrow.
- Install ribbed belt over Generator pulley last. Release tensioning
element.
- Check that ribbed belt is properly seated.

Routing of ribbed belt Page 32

- Install ribbed belt for A/C compressor.

Routing of ribbed belt Page 32
- Apply torque wrench to hex on tensioning roller and tension with a
torque of 25 Nm
- Tighten bolts -A- to 20 Nm
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All models

- Start engine and check belt running.

- Check again to ensure that bolts for coolant
pump pulley are tightened to correct torque.
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Routing of V-belt and ribbed belts
1 -
Tensioning element for ribbed belt
2 -
Generator
3 -
Viscous coupling
4 -
Coolant pump
5 -
Power steering pump
6 -
V-belt
For coolant pump
7 -
Ribbed belt For Generator, power steering pump and
viscous fan
8 -
Vibration damper
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