Porsche 944 Turbo Coolant Flush and Replacement (1986 - 1989) 

If you are changing your coolant, this is also the perfect time to give your 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 the cooling system to cool down to a coolant temperature of less than 90 degrees C. Open the cap of the cooling system slowly. Turn a conventional coolant cap as far as the first indent 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. Refer to our article on jacking up your 944 turbo for more information.
Read the Full Article: www.pelicanpar...