Coolant change

[Ste81]

Can someone please tell me how to do a coolant flush I need to change the coolant so I want to do a proper flush out all advice will be appreciated it's a golf 2.0tdi mk5 gt sport 140bhp bkd thanks

[Ste81]

Wow loads of help on this forum

[niall campbell]

well firstly is what coolant are you going to buy ??

My advice is to go to EuroCarParts and buy PRE MIXED coolant with its 50/50 mix

Then look at your expansion cap and see if its at least G12 or G13 you need


Simply disconnect the bottom hose of the radiator and drain the coolant, except you wont be able to drain all of it. Let the car cool down before draining & especially refilling ................... you don't want the extremes of going from hot to cold causing any damage

Then bleed the system on refilling it, making sure your heater in car works ok, otherwise you can damage the car .................

A rule of thumb is to run car for 10 minutes with heater on ECON and put fan on full blast with the temp at its hottest setting .................... you may have to bleed the inlet pipe going to matrix

[Ste81]

Can I mix g13 with deironized water as distilled is hard to find

[niall campbell]

no idea


can you not buy it pre mixed ? Its so much easier

[arman123]

here you go

Draining coolant Note t Collect drained [COLOR=#1B8EDE !important]coolant[/COLOR] in a clean container for re-use or disposal. t Observe waste disposal regulations. WARNING Steam may escape when expansion tank is opened. Wear eye protection and protective clothing to avoid eye injuries and scalding. Cover cap with cloth and open carefully. – Open cap for coolant expansion tank. – [COLOR=#1B8EDE !important]Remove[/COLOR] noise insulation → General body repairs, exterior; Rep. gr.50.

– Release quick-release coupling -[COLOR=#1B8EDE !important]arrow[/COLOR]- and remove coolant hose from radiator.

– Additionally remove hose from oil cooler -arrow-.

Power unit > 4-cylinder injection engine (2.0 l engine, turbocharger) > Engine cooling > Parts of cooling system > Draining and filling coolant > Draining coolant

Filling with coolant Caution For mixing, only potable water may be used. Soiled water does not have the required quality to ensure the coolant's function. Note t In vehicles as of model year 2008, only G 12 plus-plus according to TL VW 774 G may be used as coolant additive. t For vehicles up to and including model year 2007 coolant additive G 12 plus according to TL VW 774 F and G 12 plus-plus according to TL VW 774 G can be used. t The coolant additive G 12 plus-plus can be mixed with the previous coolant additive G 12 plus. Identification: both are coloured purple. t Coolant additives marked „according to TL VW 774 G“ or „according to TL VW 774 F“ prevent frost and corrosion damage, scaling and also raise boiling point of coolant. Therefore, the [COLOR=#1B8EDE !important]cooling system[/COLOR] must be filled all year round with coolant additive. t Because of its higher boiling point, the coolant improves [COLOR=#1B8EDE !important]engine[/COLOR] reliability under heavy loads, particularly in countries with tropical climates. t Frost protection is required down to about -25°C (in countries with arctic climates: down to about -35°C). t The coolant concentration must not be reduced by adding water even in warmer seasons and in warmer countries. The coolant additive concentration must be at least 40%. t If for climatic reasons greater frost protection is required, the amount of coolant additive can be increased, but only up to 60 % (frost protection to about -40 °C). Otherwise frost protection and cooling effectiveness are reduced again. t The refractometer -T10007- is recommended for determining the current anti-freeze concentration. t If radiator, heat exchanger, [COLOR=#1B8EDE !important]cylinder head[/COLOR] or cylinder head gasket is renewed, do not reuse old coolant. Recommended mixture ratios:

Frost protection to	Anti-freeze proportion	G 12 plus1) G 12 plus-plus1)	Water1) 2)
-25°C -35°C	40 % 50 %	3.2 l 4.0 l	4.8 l 4.0 l

1) The quantity of coolant can vary depending upon the vehicle [COLOR=#1B8EDE !important]equipment[/COLOR]. 2) Only use clean tap water. – Reconnect hose and connector – [COLOR=#1B8EDE !important]Install[/COLOR] noise insulation → General body repairs, exterior; Rep. gr.50. With cooling system charge unit -VAS 6096-: – Screw [COLOR=#1B8EDE !important]adapter[/COLOR] for cooling system tester -V.A.G 1274/8- onto expansion tank. – Fill coolant [COLOR=#1B8EDE !important]circuit[/COLOR] using cooling system charge unit -VAS 6096- → Operating instructions for cooling system charge unit VAS 6096. Without cooling system charge unit -VAS 6096-:

– Slowly fill coolant to upper marking of shaded field on expansion tank. – Fit expansion tank cap. Vehicles with no auxiliary heater – Start engine and maintain an engine speed of about 2000 rpm for about 3 minutes. – Run engine until radiator fan -V7- cuts-in. From heater coolant shut-off valve -N279- Caution The auxiliary heater must only be switched on when the coolant circuit is filled, described as follows:

– Connect Vehicle [COLOR=#1B8EDE !important]diagnosis[/COLOR], testing and information system -VAS 5051 A- as follows: – Push diagnosis cable [COLOR=#1B8EDE !important]connector[/COLOR] onto diagnosis connection in driver footwell. – Start engine and maintain an engine speed of about 2000 rpm for about 3 minutes. – Press buttons on display for „Vehicle self-diagnosis“, „18 - Auxiliary heater“ and „Final control diagnosis“ one after the other. – Press right [COLOR=#1B8EDE !important]arrow[/COLOR] [COLOR=#1B8EDE !important]button[/COLOR] on display up to final control diagnosis for heater coolant shut-off valve -N279-. – Initiate final control diagnosis for heater coolant shut-off valve -N279-. Continue to maintain engine speed at approx. 2000 rpm for about 1 minute. – Run engine until radiator fan -V7- cuts-in. Continuation for all vehicles WARNING Steam may escape when expansion tank is opened. Wear eye protection and protective clothing to avoid eye injuries and scalding. Cover cap with cloth and open carefully. – [COLOR=#1B8EDE !important]Check[/COLOR] coolant level and top-up if necessary. When the engine is at normal operating temperature, the coolant level must be at the upper mark; when the engine is cold, in the middle of the shaded field.

Power unit > 4-cylinder injection engine (2.0 l engine, turbocharger) > Engine cooling > Parts of cooling system > Draining and filling coolant > Filling with coolant