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Coolant Question - Where oh Where does it go 2011 base Cayman

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9 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHCoolant Question - Where oh Where does it go 2011 base Cayman

Leading reported evidence

Test cap and the overall coolant system

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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 performed work without a confirmed outcome
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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

My 2010 has the *exact* same behavior, and I've pressure tested both the cap and the overall coolant system.

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman
Frequently discussed work

Check coolant level cold every 2500-3000 miles

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Suggestion

I check the coolant level cold every 2500-3000 miles.

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman
Read full discussion summary

Leading evidence: 'Test cap and the overall coolant system' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check coolant level cold every 2500-3000 miles' (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.

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1 matching discussions · 9 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Check coolant level cold every 2500-3000 miles

Suggestion or failed attempt

No successful repair reported for this finding.

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Unsuccessful attempts
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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

I check the coolant level cold every 2500-3000 miles.

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman

Replace coolant reservoir cap

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes
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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

I'd start by replacing the coolant reservoir cap that's inside the engine compartment.

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman

Replace though

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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

They're not very expensive to just replace, though.

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman

Set car model and look

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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

Set your car model and look under Engine->Cooling

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman
Frequently discussed actions (5)

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

Check coolant level cold every 2500-3000 miles

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

I check the coolant level cold every 2500-3000 miles.

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman

Replace coolant reservoir cap

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

I'd start by replacing the coolant reservoir cap that's inside the engine compartment.

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman

Replace though

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

They're not very expensive to just replace, though.

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman

Set car model and look

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

Set your car model and look under Engine->Cooling

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman

Test cap and the overall coolant system

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

My 2010 has the *exact* same behavior, and I've pressure tested both the cap and the overall coolant system.

Original post Read captured discussion
Coolant Question - Where oh Where does it go 2011 base Cayman
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.

  • Planet-9: 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: 20261027T020439Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

on my 2011 Base Cayman. 50,000 miles or so. I check the coolant level cold every 2500-3000 miles. Inevitably I have to add about 6 ounces or so to bring it up to minimal level . I see no leaks , I have had both covers off and looked for telltale drip marks - nothing. I occasionally smell the radiator fluid smell after she is hot at the drivers side rear outside intake. Again no leaks, no warnings , never overheats . Just wondering if anyone might have insight to this ? Could I be venting it somehow ? Should I be concerned ?

POST 2Original post

I'd start by replacing the coolant reservoir cap that's inside the engine compartment. Mine went bad at 50K miles. Relatively cheap.

POST 3Original post

Heh. My 2010 has the *exact* same behavior, and I've pressure tested both the cap and the overall coolant system. The cap vents vapor in normal operation by design, and my assumption at this point is that it's just coolant slowly escaping as vapor over time.

POST 4Original post

that has been my gut feeling , just venting, Ill go with that for now , I may try a new cap as well, and you do mean the fill cap correct ?? thanks !

POST 5Original post

There are two caps. The fill cap (in the trunk) is just a seal with an o-ring. That's likely fine if you're not seeing any white residue or liquid around the base of the cap. The actual pressure cap is in the engine bay on top of the coolant tank. That is designed to vent at ~20PSI as the coolant expands and heats up, and then it lets air back into the system as it cools down. Caps can go bad over time and open too soon or not open at all. I've got a pressure tester so I was able to test mine. If there's no coolant residue on top of the reservoir it's *probably* good. They're not very expensive to just replace, though.

POST 6Original post

Gubi, thanks interesting , do you happen to have a part number, when I search for the cap on my Cayman the only one that shows is the blue fill cap ( mine is fine) . I assume you get to it by removing the top engine cover ?

POST 7Original post

Yes, you remove the engine cover. The coolant expansion tank is right on top. This is what ECS Tuning gives me for the Porsche part. They also have aftermarket ones that are cheaper. Set your car model and look under Engine->Cooling https://www.ecstuning.com/b-genuine-porsche-parts/coolant-expansion-tank-cap/99610644704/

POST 9Original post

Thought I’d follow up Both caps replaced and issues gone. Thanks all

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