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Coolant low on 2007 Cayman S - need advice

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

Discussion summary

YOUR RESEARCHCoolant low on 2007 Cayman S - need advice

Reported or suspected cause

from the original coolant expansion tank cap losing seal

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

When I pulled my engine cover recently, I noticed white dried spatter, which turned out to be from the original coolant expansion tank cap losing seal under pressure (mine was 996.106.447.01).

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice
Frequently discussed work

Check level and mine was about a bottle low

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

Check the level and mine was about a bottle low.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice
Read full discussion summary

Leading evidence: 'from the original coolant expansion tank cap losing seal' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'from the original coolant expansion tank cap losing seal' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check level and mine was about a bottle low' (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 · 10 captured posts examined · 1 partial discussions

Compare 4 other evidence results

Check today and level is below minimum

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

I checked today and level is below minimum.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Replace but never looked at the coolant

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

I'm hoping it was just low, haven't had the car for too long and it runs great temp gauge always straight up in middle, I had the air filter changed and oil changed but never looked at the coolant.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Replace gasket

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

I replaced that with 996.106.447.04, and replaced the gasket on the coolant fill cap 987.106.170.00.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Replace i also had the dried splatter

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

I also had the dried splatter before it was changed.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice
Frequently discussed actions (9)

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

Check level and mine was about a bottle low

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

Check the level and mine was about a bottle low.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Check today and level is below minimum

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

I checked today and level is below minimum.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Fill mark or

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

Can I fill with distilled water to the fill mark or use something else more readily available?

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Fill with distilled water

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

Can I fill with distilled water to the fill mark or use something else more readily available?

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Fill with distilled water short term

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

Yes, you can fill with distilled water short term.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Replace but never looked at the coolant

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

I'm hoping it was just low, haven't had the car for too long and it runs great temp gauge always straight up in middle, I had the air filter changed and oil changed but never looked at the coolant.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Replace gasket

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

I replaced that with 996.106.447.04, and replaced the gasket on the coolant fill cap 987.106.170.00.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Replace i also had the dried splatter

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

I also had the dried splatter before it was changed.

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice

Use non

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

Whether you can use non-

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice
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.

from the original coolant expansion tank cap losing seal

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

When I pulled my engine cover recently, I noticed white dried spatter, which turned out to be from the original coolant expansion tank cap losing seal under pressure (mine was 996.106.447.01).

Original post Read captured discussion
Coolant low on 2007 Cayman S - need advice
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.

10 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: 20261027T000231Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

A few times the past few weeks my coolant warning light has flashed. Each time it went off after 30-60 seconds. I checked today and level is below minimum. I understand that Porsche coolant is best, but I can't get to the dealer at least until middle or end of next week. What could I use in the meantime? Can I fill with distilled water to the fill mark or use something else more readily available? It's for a 2007 cayman s with 16k miles. I haven't seen any obvious leaks. It's been very, very hot here. Car is driving normal and temp gauge never goes above the halfway mark. Thanks.

POST 2Original post

Yes, you can fill with distilled water short term. Whether you can use non- Porsche coolant is bit controversial, but there are some who say that you can. You need to get a specific type but I don't remember what that was (sorry).

POST 3Original post

I have a 2007 CS and my Porsche dealer said water is just fine. He actually said any water is fine but after reading a lot on here I just bought distilledto be safe (this site causesmy car anxiety to go through the roof sometimes!)

POST 4Original post

That's true - both the tap water and P9-induced anxiety. :hilarious: Downside of reading into too many things online. One thing to remember is that tap water has minerals, etc., that you don't want making deposits (over long term) or raise the freezing point in the winter. :cheers:

POST 5Original post

Ten days of almost 100 degree temps around DC a few weeks ago and my 128i did this. BMW sells a small top off bottle of coolant and I bought two bottles. Check the level and mine was about a bottle low. No leaks, it has just been very, very hot. After adding a bottle all has been well. I would stop by Porsche and see if they have something similar or just top off with distilled water.

POST 6Original post

When I pulled my engine cover recently, I noticed white dried spatter, which turned out to be from the original coolant expansion tank cap losing seal under pressure (mine was 996.106.447.01). I replaced that with 996.106.447.04, and replaced the gasket on the coolant fill cap 987.106.170.00. So far my levels havent moved at all after a top-up with the expensive stuff and distiller water. It's a cheap and simple hedge, especially given the lousy reliability of the original expansion tank cap. You might take a look.

POST 7Original post

Also, if you are in the Littleton area, I have a gallon of the OEM coolant and distiller water. You are welcome to come top up correctly.

POST 8Original post

I had a coolant low light come on in my 2007 cayman 2.7 and noticed white dried spatter all over the cap where you add coolant and had to add almost a gallon of distilled water! I'm hoping it was just low, haven't had the car for too long and it runs great temp gauge always straight up in middle, I had the air filter changed and oil changed but never looked at the coolant. Anyway is it possible for it to be that low and not be the water pump or something? Just noticed this an OLD thread, but if anyone wants to chime in....

POST 9Original post

My mechanic said that some of the old filler caps were defective and replaced mine. I also had the dried splatter before it was changed.

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