fullymatted.
Back to search
Porsche Club GB

Leaking coolant

Add to repair workspace
Open repair workspace
Original source
6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHLeaking coolant

Leading reported evidence

Replace but all doable

Suggestion or failed attempt

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 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

A bit of a fiddle to replace but all doable.

Original post Read captured discussion
Leaking coolant
Read full discussion summary

Leading evidence: 'Replace but all doable' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace but all doable' (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.

Read captured replies

1 matching discussions · 6 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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

Replace but all doable

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

A bit of a fiddle to replace but all doable.

Original post Read captured discussion
Leaking coolant
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.

6 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: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi , just been on a drive for about 40 mins and was about to put the car in the garage when I noticed coolant leaking out from under the rear of the car , looks like it was coming from the header tank cap , is this something anybody has experienced ? Temperature gauge in car showing normal , do I just need a new cap ? Any advice much appreciated.

POST 2Original post

Hi, I think the cap is the first place to look, understand it is a common issue, probably cheapest fix if it does the job!

POST 3Original post

I had the same problem with my 99 Boxster, in my case it was a known problem with a particular batch of caps. I hope yours is the same cheap to sort repair.

POST 4Original post

As has been said, the coolant cap is a common problem. The latest version is part number 996.106.447.04 so if you have an older version then it is worth changing. (Part number is moulded into the top). They are £14.35+VAT.

POST 5Original post

As Richard said the cap is the first port of call, failing that the expansion tanks do fail with hairline cracks and lose coolant under pressure making it a bit of a awkward to diagnose sometimes. A bit of a fiddle to replace but all doable. Good luck Andy

POST 6 / ORIGINAL POSTEROriginal post

Thanks for the advice , appreciated .

This is a source reference. Confirm exact model applicability in the original material.