fullymatted.
Back to search
Porsche Club GB

Coolant Level Keeps Dropping

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

Discussion summary

YOUR RESEARCHCoolant Level Keeps Dropping

Reported or suspected cause

crack in the coolant tank

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.

Reported cause

Turned out to be a crack in the coolant tank.

Coolant Level Keeps Dropping
Frequently discussed work

Check rads it is a big problem they

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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

Hi Have you checked the RADS it is a big problem they fill up with road grime and you can't see it then the rads start to leek but no coolant on the floor as it gets absorbed in the grime and sits on top of the plastics it is easy to take the front bumper plastic of and have a good look and clean them out

Coolant Level Keeps Dropping
Read full discussion summary

Leading evidence: 'crack in the coolant tank' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'crack in the coolant tank' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check rads it is a big problem they' (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 · 9 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Check rads it is a big problem they

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

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

Hi Have you checked the RADS it is a big problem they fill up with road grime and you can't see it then the rads start to leek but no coolant on the floor as it gets absorbed in the grime and sits on top of the plastics it is easy to take the front bumper plastic of and have a good look and clean them out

Coolant Level Keeps Dropping

Replace cap

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

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

Changed cap to a newer spec, but after shining a torch in behind the coolant tank i discovered a very small leak.

Coolant Level Keeps Dropping

pressurised crank case and fumes coming back up

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
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 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

The oil seems fine, there is some yellow gunk at the cap end but I have cleaned this and was advised that this is due to the pressurised crank case and fumes coming back up.

Coolant Level Keeps Dropping

Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

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 rads it is a big problem they

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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

Hi Have you checked the RADS it is a big problem they fill up with road grime and you can't see it then the rads start to leek but no coolant on the floor as it gets absorbed in the grime and sits on top of the plastics it is easy to take the front bumper plastic of and have a good look and clean them out

Coolant Level Keeps Dropping

Replace cap

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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

Changed cap to a newer spec, but after shining a torch in behind the coolant tank i discovered a very small leak.

Coolant Level Keeps Dropping
Reported and suspected causes (2)

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

crack in the coolant tank

No successful repair reported for this finding.

1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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

Turned out to be a crack in the coolant tank.

Coolant Level Keeps Dropping

pressurised crank case and fumes coming back up

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

The oil seems fine, there is some yellow gunk at the cap end but I have cleaned this and was advised that this is due to the pressurised crank case and fumes coming back up.

Coolant Level Keeps Dropping

Outcome qualification: Negation, uncertainty or missing explicit repair resolution overrides the raw extraction signal.

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.

9 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 · 1 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261027T042512Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi Guys I have noticed that my coolant level seems to drop quite quickly, I topped it up when I got the car (4 or 5 weeks ago) & then last week and I noticed last night that it needed topping up again. Is this normal?? I am trying to use it at least once a week and have done approx 300 miles during this time. The oil seems fine, there is some yellow gunk at the cap end but I have cleaned this and was advised that this is due to the pressurised crank case and fumes coming back up. The oil itself looks nice and clean. Should I be concerned? Thanks

POST 2Original post

Can you see any coolant on the floor? Can you smell any while driving or getting in the car? Does your engine heat up quicker or higher than before?

POST 3Original post

Do a search for 'coolant cap' - there was a revised cap with improved seal, you may have a car with the old cap or even a newer cap thats now failing. Another posibility is a split coolant header tank, not unknow after 5-6 years, but you'd be seeing coolant on the floor after a runout with the coolant up to temp.

POST 4 / ORIGINAL POSTEROriginal post

I'm not seeing anything on the garage floor, although I have scheduled to be sealing the floor this weekend with a rubberised paint to help with such detection. The temp has been sitting at approx 80 (just slightly over)

POST 5Original post

[blockquote] I had the same problem. Turned out to be a crack in the coolant tank. Dave Wilson 99 C2. Rouse Sport 304 R Cosworth .RS 1800. VW Beetle Cabriolet ,not forgeting my latest toy Mini Cooper S. [/blockquote]

POST 6Original post

Have had similar problems with mine. Was difficult to see any coolant leak. Changed cap to a newer spec, but after shining a torch in behind the coolant tank i discovered a very small leak. No bigger than a pin prick. I believe it is an achiles heel with Porsche. Best of luck.

POST 8Original post

..........21,000 and still on the first tank and first RMS. Hope I haven't spoken too soon! Fingers crossed!

POST 9Original post

Hi Have you checked the RADS it is a big problem they fill up with road grime and you can't see it then the rads start to leek but no coolant on the floor as it gets absorbed in the grime and sits on top of the plastics it is easy to take the front bumper plastic of and have a good look and clean them out 996 babes

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