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I'm posting this after checking through the good info in the recent 60k mile maintenance thread.

I'm coming up on 30k and very good local indy will be doing the service. I've checked through the maintenance schedules and know pretty much what's going to be done.

Only thing I can't find is a schedule for doing a coolant flush. Is there a recommended schedule somewhere for doing this? If not, is there a general consensus on how often a cooling flush is needed?

2003 C4S. approaching 30k. No issues. Temp is constant at 180 all seasons, all speeds. Thanks in advance...

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Porsche says the coolant used is "lifetime coolant" but I don't go for this. There is no specific service internal by Porsche for flushing and replacing the coolant. As your car is 7 years old I would say go ahead and do it now. I do mine every 2-3 years.

I don't use the super expensive OEM coolant. I used Peak 50/50 or Peak full strength diluted with distilled water. It is good to flush the system with water (distilled) as part of this as the OEM coolant can jell when mixed with some types of coolant. They system hold several gallons of coolant if you include the front radiators and the pipes and hoses to them.

If you are going to do the work yourself look into a Uview 55000 here is a link: http://www.eshocks.com/bil_veh.asp?M...=All&SubChar=Q You can find them from lots of sources, just google it.

Also do a search here and on the other sites and you will find lots of threads on coolants for 996's.

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I recommend 30K miles, and I recommend using the Porsche factory coolant. It's actually not that much more expensive than the regular stuff, and you only change the coolant once every 3 years or so anyways...

-Wayne

With complete respect, there is nothing harmful in changing coolant at such a short interval, but is a real waste of coolant. Even a 3 year interval is overkill, but then again, some still recommend changing your oil at 3000 miles too.

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