Porsche Club GB

Coolant loss- but only in Winter?

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5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHCoolant loss- but only in Winter?

Reported or suspected cause

2-3 litres

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

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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 suspect 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.

Suspected cause · Original poster
I'd love that to be the answer, but suspect 2-3 litres to be too much for expansion/contraction
Original post Read captured discussion
Coolant loss- but only in Winter?

Frequently discussed work

Check might give you a clue

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
Perhaps a simple system pressure check might give you a clue.
Original post Read captured discussion
Coolant loss- but only in Winter?

Read full discussion summary

Leading evidence: '2-3 litres' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is '2-3 litres' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check might give you a clue' (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.

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1 matching discussions · 5 captured posts examined · 0 partial discussions

Compare 2 other evidence results

Check might give you a clue

Suggestion or failed attempt

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
Perhaps a simple system pressure check might give you a clue.
Original post Read captured discussion
Coolant loss- but only in Winter?

Test might be a good idea

Suggestion or failed attempt

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 · Original poster
A pressure test might be a good idea!
Original post Read captured discussion
Coolant loss- but only in Winter?

Frequently discussed actions (2)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check might give you a clue

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
Perhaps a simple system pressure check might give you a clue.
Original post Read captured discussion
Coolant loss- but only in Winter?

Test might be a good idea

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 · Original poster
A pressure test might be a good idea!
Original post Read captured discussion
Coolant loss- but only in Winter?

Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

2-3 litres

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that suspect 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.

Suspected cause · Original poster
I'd love that to be the answer, but suspect 2-3 litres to be too much for expansion/contraction
Original post Read captured discussion
Coolant loss- but only in Winter?

Coverage and how to read this overview

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.

5 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Porsche Club GB: 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: 20261026T150451Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi all It's been an expensive year, but a lot of big jobs getting done! From November last, I've had new power steering pipes and tank, new water pump, 4 new wheels and tyres, full service, new A/C condensers, rear pads/discs a full geo reset and new front shocks. Between the water pump replacement (December) and service (April 2011) it seems I lost about 3l of coolant. No evidence of leaks and when the A/C condensers were done, the rads were checked and seemed OK. I couldn't afford to replace them at the time. Over the spring and summer I lost no coolant, but in the last 4 weeks I seem to be losing some again. Topped up with 1.5l 3 weeks ago, and now needs another litre. So, the question is- could there be an issue with the heater water circulation- it seems I only lose coolant when the heater needs to be on (Dec to April and now September to November)? Or is it just coincidence?

POST 2Original post

maybe coolant has a smaller volume when its extra cold in winter?

POST 3 / ORIGINAL POSTEROriginal post

I'd love that to be the answer, but suspect 2-3 litres to be too much for expansion/contraction

POST 4Original post

There is obviously something amiss. I don't think I ever put any coolant in either of my 996's in all the time I owned them. I have a bottle of coolant for top ups, but the cap is still sealed. Apart from the old favourites like rads, coolant tank, and tank cap (all of which would show drips on the garage floor) I can't think of anything common. Perhaps a simple system pressure check might give you a clue.

POST 5 / ORIGINAL POSTEROriginal post

Thanks Richard. I don't have a garage- I park on a gravel drive so looking for drips is difficult, but even when parked on harder surfaces overnight there are no obvious drips. A pressure test might be a good idea!

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