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Old May 23rd, 2020, 05:13   #5
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Join Date: Mar 2005
Location: Back in So Flo - St Lucie

Having worked at a Chrysler dealer before starting my 15 years with VW I can tell you there is a "flush" device with a couple tanks that claims to do a complete system exchange through the pressure cap. More accurate would be to call it a coolant service station to drain and fill system.

In my experience, even when new, you were lucky to get more than 1/2 of the system capacity out. But done on a regular basis you replaced a large chunk of the coolant with fresh additives and remove contaminates.

That said there is no pull a hose and drain the whole system on a new VW like the Common Rail or any TSI. Heck, you need a scan tool to actuate the thermo valves open and program the coolant pump to purge mode. After trying to flush the junk when changing a heater core I can tell you its hard to get all of it out.

VW and ASE Master Mechanic. Means nothing without the 15+years working at VW. Also know my way around an aircooled 34 pict 3 or Bosch D-jet.
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