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Originally Posted by urban_legend
LB - I couldn't find a DIY for the coolant flush - since Porsche calls it lifetime.
either it has not been done or (most) cases was done when something else failed.
"Lifetime" in German means until something else fails first  |
The very best coolant out there is 5yr/150k mi. whichever comes first. After this, corrosion protection and lubrication go away.
Porsche has a procedure for draining/filling/bleeding the system in the factory repair manual. Draining it involves opening the coolant cap, the drain plug and a vent line. Filling it requires opening the bleed valve and a procedure for running the engine to purge any air. Tiptronic cars have an additional procedure due to an electric valve for coolant to the tranny.
