If you are changing your coolant this is also the perfect time to give you cooling system a complete flush. While it is next to impossible to get all of the coolant and contaminants out of the system without removing the heater core lines and blowing out the heating system this method will get the system as clean as possible and more than good enough for the next three years.
A couple of safety precautions/instructions you may want to observe before beginning:
Allow cooling system to cool down to a coolant temperature of less than 90°C. Open the cap of cooling system slowly; turn a conventional coolant cap as far as the first detent and turn a screwed coolant cap approx. 1/2 turn and release the pressure. Wear protective gloves, protective clothing and eye protection. NEVER pour coolant into beverage bottles, cups, etc... Someone might accidentally pick that cup up and start to drink.
Begin by safely jacking up and supporting your car. With the car safely off the ground you will need to remove the engine tray and right side lower wheel well panel. A great many of these car have had the engine trays and front side panels removed over the years and not replaced. If you happen to have a car that still has all the under trays and original hardware please see our article on under tray removal.
Project Time: 2 hours
Tab: $15 to $50
Tools: Pliers, flathead screwdriver, large bucket
Parts Required: New coolant,
Performance Gain: Fresh coolant
Complementary Modification: New hoses
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Applicable Models:
2006 Volkswagen GTI Base Hatchback 2.0L L4
2007 Volkswagen GTI Base Hatchback 2.0L L4
2008 Volkswagen GTI Base Hatchback 2.0L L4
2009 Volkswagen GTI Base Hatchback 2.0L L4
2008 Volkswagen R32 Base Hatchback 3.2L V6