Go Back  6SpeedOnline - Porsche Forum and Luxury Car Resource > Porsche (Present) > 996 Turbo / GT2
Reload this Page >

Help with coolant issue after radiator changes

Notices
996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.
Sponsored by:

Help with coolant issue after radiator changes

 
  #1  
Old 01-06-2019, 04:25 PM
Registered User
Thread Starter
Join Date: Jun 2018
Location: PA
Age: 46
Posts: 30
Rep Power: 0
evdean is an unknown quantity at this point
Help with coolant issue after radiator changes

Just replaced all 3 radiators, used a pressure tester (no leaks) and a vacuum tool to refill. Was able to add exactly the same amount in as came out. When the car is warmed up it stays steady at 180 for an hour so no overheating issues, but the coolant tank level drops a bit until i remove the cap and relieve the pressure it goes back to where it was. see vid
​​​​​​
When i got home the bleeder valve was up, but no air was coming out (bad bleeder valve?)

thoughts?
 
  #2  
Old 01-07-2019, 08:10 AM
Slider's Avatar
Registered User
Join Date: Apr 2010
Location: Victoria, BC
Posts: 2,011
Rep Power: 192
Slider has a reputation beyond reputeSlider has a reputation beyond reputeSlider has a reputation beyond reputeSlider has a reputation beyond reputeSlider has a reputation beyond reputeSlider has a reputation beyond reputeSlider has a reputation beyond reputeSlider has a reputation beyond reputeSlider has a reputation beyond reputeSlider has a reputation beyond reputeSlider has a reputation beyond repute
That doesn't look significant. You may have a little air trapped somewhere that will eventually work its way out, but if your temperature is staying at 180, all is good. (...and you were able to confirm that your cap is good)
 
  #3  
Old 01-07-2019, 01:47 PM
Registered User
Join Date: Jun 2009
Location: Livermore, CA
Posts: 2,101
Rep Power: 137
Macster has a reputation beyond reputeMacster has a reputation beyond reputeMacster has a reputation beyond reputeMacster has a reputation beyond reputeMacster has a reputation beyond reputeMacster has a reputation beyond reputeMacster has a reputation beyond reputeMacster has a reputation beyond reputeMacster has a reputation beyond reputeMacster has a reputation beyond reputeMacster has a reputation beyond repute
My 2003 Turbo received 3 new radiators back in Jan. 2015. The work done at a dealer. No issues so I have no direct experience but the cooling system needs to get hotter than 180F ( and you need to confirm this using an OBD2 code reader/data viewer/logger connected to the OBD2 port and configured to query for coolant temperature every so often) so the T-stat opens fully and coolant is circulated thorough all the cooling system.

I had the Turbo cooling system drained and refilled 3 times (one time after hitting a mule deer, after a water pump was replaced, and after the radiators were replaced) and the 2002 Boxster's cooling system also drained and refilled at least 3 times (maybe 4 times) and after every time I made it a point to drive the car normally -- with the A/C off -- and around town until the coolant was hot. Hot enough to trigger the radiator fans to come on which I knew from observation happened at 212F.

This was to make sure the system was fluid/pressure tight and to make sure there were no air pockets. I never found any the vacuum lift system worked like a charm to properly fill the cooling system with no air pockets. But this may not be the case for your car.
 
  #4  
Old 01-09-2019, 10:14 AM
VAGscum's Avatar
Registered User
Join Date: Oct 2008
Location: Portland Oregon
Posts: 1,702
Rep Power: 182
VAGscum has a reputation beyond reputeVAGscum has a reputation beyond reputeVAGscum has a reputation beyond reputeVAGscum has a reputation beyond reputeVAGscum has a reputation beyond reputeVAGscum has a reputation beyond reputeVAGscum has a reputation beyond reputeVAGscum has a reputation beyond reputeVAGscum has a reputation beyond reputeVAGscum has a reputation beyond reputeVAGscum has a reputation beyond repute
Originally Posted by evdean
Just replaced all 3 radiators, used a pressure tester (no leaks) and a vacuum tool to refill. Was able to add exactly the same amount in as came out. When the car is warmed up it stays steady at 180 for an hour so no overheating issues, but the coolant tank level drops a bit until i remove the cap and relieve the pressure it goes back to where it was. see vid
​​​​​​
When i got home the bleeder valve was up, but no air was coming out (bad bleeder valve?)

thoughts?
Jack the rear of the car and let idle for a while with heater on full blast. Air tends to collect in the heater cores and the best way to confirm is with heater on. If the heater temp fluctuates or never gets hot you have an air bubble in the heater core. With the rear elevated you should be able to burp the system. If not by idling then use the vacuum servicing tool.
 
  #5  
Old 01-09-2019, 09:30 PM
'02996ttx50's Avatar
Registered User
Join Date: May 2009
Location: la
Posts: 7,666
Rep Power: 569
'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute'02996ttx50 has a reputation beyond repute
all that happened was you didnt get the system properly pressurized after you re-filled the coolant. this results in coolant escaping and you still have the valve UP.

time to CLOSE the valve at the cap and top off, if or as needed.
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
vman932
996 Turbo / GT2
20
05-04-2018 07:17 PM
dgreen78
996 Turbo / GT2
17
12-03-2011 05:46 PM
Yves
996 Turbo / GT2
36
07-07-2011 07:35 AM
DjDizolve
Tech / How To
0
11-28-2009 11:08 PM
TXGold
996 Turbo / GT2
14
02-05-2009 04:02 PM


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:

Quick Reply: Help with coolant issue after radiator changes


Join 6SpeedOnline
Visit our Sponsors

Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.