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Old 05-16-2013, 06:15 PM   #38
Paul
Porsche "Purist"
 
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Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
Garage
Most of the advice about refilling the system is based on doing it quickly and getting the car on it's way.

If you have the time.....

I've had excellent results with just filling the system with the vent open then starting the motor with the cap loose and adding coolant as it warms up to keep the tank full. Once the level stabilizes, I bring the tank up to the full line and close the cap and vent and let the car idle until the radiator fans run. Then I let it cool over night. In the morning if the tank is not completely empty, I just top it off and it's good to go.

If it's empty, I repeat the process.
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1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.

Last edited by Paul; 05-16-2013 at 06:21 PM.
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