10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCoolant refill procedure problem
Leading reported evidence
Use airlift
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Not sure if this is helpful but did you use an airlift before refilling?
I don't have tiptronic but when i used the airlift after replacing the waterpump and thermostat (and throughly draining the system) I had very little air.
Leading evidence: 'Use airlift' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check tomorrow and top up' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
+1 good advice I did it that way plus when running car I had heater on I think to let the valves open up thermostat to open it will cause the red temp warning led to flash let car cool down properly then topped up
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
+1 good advice I did it that way plus when running car I had heater on I think to let the valves open up thermostat to open it will cause the red temp warning led to flash let car cool down properly then topped up
I don't have tiptronic but when i used the airlift after replacing the waterpump and thermostat (and throughly draining the system) I had very little air.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
10 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T184158Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I have just gone throught the procedure described in the Porsche workshop manual and in some threads on the internet. They state that fuse B1 has to be removed if the car has tiptronic so that a shut off valve stays open when the car is started and revved up to remove air from the system.
Temperature and revs have to be monitored. Problem: fuse B1 also controls the instrument panel (and the diagnostic socket), so impossible to monitor temp and revs with the fuse out.
Someone must have had the same problem. Help!!
Car is 996, C4 cabriolet with tiptronic
Not sure if this is helpful but did you use an airlift before refilling? I don't have tiptronic but when i used the airlift after replacing the waterpump and thermostat (and throughly draining the system) I had very little air. In maybe 200 miles of driving I added less than 1/2 pint of fluid to top off and havent added any since.
If so, you may not have a problem.
What kind of Mileage do you have on your car? Why are you refilling? Porsche coolant is supposedly a life time coolant and should not have to be changed in a regular interval. I did mine once, but only because I had a fitting break
18000 miles! Rubber hose sprung a leak, actually a t-piece came apart where the tiptronic cooler pipe comes off the main back to front pipe.
Most of the coolant drained out via the leak.
If you managed to get 19.5 ltr of coolant in the system then forget about the fuse and start the car. Open manually the breather at the top of the fill up tank. Better known as the burper valve and drive the car. Don't hammer it and take along some coolant. You may even see the 250 degree mark light up but dont worry (its only saying theres not enough coolant in the system yet) thats another one of the 1000 things we didn't know about the 996. Switch off, let her cool down a bit and top up the plastic filler tank (if needed) and drive again. Even though its a triptronic I can't see what differance that would make in doing a complete coolant change and in any case, are you sure you lost ALL of your coolant before starting the work? I think not. I didn't use an airlift. Did mine the 'old fashioned way' and is fine but mine not tiptronic. If you are sure that no one (APO) has been messing with the electrical side of your fuse box and you removed the fuse and it didn't work, then do the job anyway like I suggest. Keep that burper valve open for a few days and carry the coolant along with you. Only fill the plastic filler half way.
+1 good advice I did it that way plus when running car I had heater on I think to let the valves open up thermostat to open it will cause the red temp warning led to flash let car cool down properly then topped up
This is a source reference. Confirm exact model applicability in the original material.
