Coolant pump — AUDI

AEC AHK
Notes:

Always replace seals and gaskets.
Draining off and topping up coolant =>Page
19-5
.

Coolant pump
Removing => Page
19-4

Gasket
10 Nm

Removing coolant pump

Removing toothed belts, engine codes ABH, AEC => Page
15-3
.

Removing toothed belts, engine code AHK => Page
15-27
.

Notes:

The vibration damper does not have to be unbolted or removed.

Unscrew toothed-belt tensioner.
Remove coolant pump (9 x Torx screws).

Replacing thermostat.

The thermostat is located at the front right of the engine beneath the intake manifold.

Installation position of thermostat

Note:

Install with bleeder valve facing upwards.

Starts to open · 87o
Fully open · 102o
Opening travel · 8 mm

Draining and filling cooling system

Notes:

The cooling system is filled all year round with water, anti- freeze and anti- corrosion agent G 011V 8B.
G 011 V 8B prevents frost and corrosion damage and a formation of scale. G 011 V 8B in addition raises the boiling temperature of the coolant. For these reasons the cooling system must be filled all year round with the correct anti - freeze and anti - corrosion additive.
G 011 V 8B.
Because of its high boiling point, the coolant improves engine reliability under heavy loads, particularly in countries with tropical climates.

Recommended mixture ratio: 50:50
Coolant quantity approx. 8.5 l

Draining

Carefully unscrew filler cap on expansion tank to relieve pressure then tighten again.
Remove noise insulation panel.

Place collection container V.A.G 1306 under vehicle.
Attach auxiliary hose ø approx. 12 mm of dia. to drain cock of radiator and drain off coolant.

Open drain screw on engine on left beneath knock sensor.

Open drain screw at oil cooler housing behind oil filter.
Unscrew return pipe from radiator to expansion tank at radiator.
Close off pipe connection at radiator with finger.
Blow compressed air into the detached return pipe until no further coolant emerges at any of the three drain openings.
Reconnect bleeder pipe to radiator.
Close drain cock at radiator and pull hose off connection piece.
Screw in (20 Nm) the two coolant drain screws on the left and right of the engine block. Replace gaskets.

Fill up

Note:

Only use the coolant additive G 011 V 8B.

Switch ignition on.
Set air conditioner to HI.
Switch off ignition.

Open bleeder screw at heating-system heat exchanger approx. 2 turns.
Put in coolant. Squeezing the top hose several times will help to force out the air.
Allow engine to warm up. Leave AC set to HI until a coolant temperature of slightly less than 100o C is indicated. The engine is to be warmed up at a speed of between 2000 and 3000 rpm with several brief increases to 4000 and 5000 rpm.
Stop engine. Wait for about 5 - 10 minutes and then carefully open filler cap on expansion tank (system will be under pressure).
Top up coolant to max. mark.
Close filler cap on expansion tank.
Run engine and repeat topping up procedure as necessary.