13 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWhere's my coolant?
Reported or suspected cause
cap
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
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 report identifying a cause
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.
Check under the car where the a/c condensation drain is
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
Put some "dye" in the coolant tank, then after a while when you notice the coolant is low, check under the car where the A/C condensation drain is with a Ultra-Violet light.
Leading evidence: 'cap' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'cap' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check under the car where the a/c condensation drain is' (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 report identifying a cause
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.
Reported cause
Mine turned out to be a faulty pressure relief valve on the expansion tank.
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
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.
Performed · outcome unconfirmed · Original poster
They also have changed the coolant tank cap (just in case)
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
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.
Performed · outcome unconfirmed
Started out with the same issue, replaced expansion tank and cap..
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
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.
Performed · outcome unconfirmed · Original poster
Yes, the workshop tested the pressure of the coolant system.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check under the car where the a/c condensation drain is
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
Put some "dye" in the coolant tank, then after a while when you notice the coolant is low, check under the car where the A/C condensation drain is with a Ultra-Violet light.
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.
13 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: 20261026T024951Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi everyone.
I'm the owner of a '04 C4 Cabrio 5AT.
I have an issue with the coolant, which disappears from the tank but no idea about where it is.
My Porsche's workshop already have checked
Coolant hoses (apparently OK)
Radiators
Engine oil seems to be OK and they also have discard the combustion chamber
They also have changed the coolant tank cap (just in case)
Any idea? There is something that I thing might be related: If I turn on clima everything is OK, but if I also turn on the AC, then I start to smell it.
Any suggestion?
Best,
Put some "dye" in the coolant tank, then after a while when you notice the coolant is low, check under the car where the A/C condensation drain is with a Ultra-Violet light.
I bet you will find traces of the Dye there. It will require a new heater-core. Fortunately not a bad job at all on the 996...
If you smell it when you put on the AC, it's most likely in the heater core or some where in front of it. Do a little investigation and you'll probably find some pink residue some where up front. That will be your issue.
Concur with PT3 and Paul. When mine did that it was the heater core although it must have been a small leak as it never emptied the coolant tank, but you could smell it inside the car.
Mine turned out to be a faulty pressure relief valve on the expansion tank. The spring was just weak enough to vent when under pressure, but never showed any liquid water pooling anywhere.
Have you pressure tested the coolant system? You can get a pretty nice / cheap pressure tester from Harbor Freight.
I just noticed I have a small puddle near the front of car (passenger side-ish) on the floor after I took the car to body shop. Looks like I'll be hunting down a coolant leak too
Oh well, my indy needs something to chase around since I haven't had to give him much business since he sold me this car 3 years ago!!! Yay!
The tiny leak from my plastic expansion tank ended up dripping on the left-side exhaust manifold and evaporating. The result was no puddle, but a declining coolant level over time. Slight coolant smell when hot, but it was hard to find. Replacing the coolant tank was a PITA, too.
Started out with the same issue, replaced expansion tank and cap.. (Tank was cracked, cap was old style cap.
Better but still losing coolant.
Finally got ginormous cloud of white smoke out the right tail pipe wich lead to the cracked cylinder #1, also figured out the AOS failed about the same time.
