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what's going on here????? It's not what I hope it isn't, is it?

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YOUR RESEARCHwhat's going on here????? It's not what I hope it isn't, is it?

Leading reported evidence

Install headlight switch in 15 minutes

Performed · outcome unconfirmed

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Performed · outcome unconfirmed · Original poster

Also installed the new headlight switch in 15 minutes.

what's going on here????? It's not what I hope it isn't, is it?
Frequently discussed work

Check cap part no

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Suggestion

Check your cap part no.

what's going on here????? It's not what I hope it isn't, is it?
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Leading evidence: 'Install headlight switch in 15 minutes' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check cap part no' (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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Compare 4 other evidence results

Check cap part no

Suggestion or failed attempt

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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 contain suggestions
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Suggestion

Check your cap part no.

what's going on here????? It's not what I hope it isn't, is it?

Check rubber tube

Suggestion or failed attempt

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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.

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Suggestion

cap, also check the rubber tube for the overflow...

what's going on here????? It's not what I hope it isn't, is it?

Check those areas periodically

Suggestion or failed attempt

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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

Then clean up the residue as much as you can and check those areas periodically.

what's going on here????? It's not what I hope it isn't, is it?

Replace cap

Suggestion or failed attempt

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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

Looks like you need to replace the cap with the updated one, part number ends in 03 (rather than 01).

what's going on here????? It's not what I hope it isn't, is it?

Suggestion

As Kevin said ^ replace the cap.

what's going on here????? It's not what I hope it isn't, is it?
Frequently discussed actions (7)

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

Check cap part no

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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.

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Suggestion

Check your cap part no.

what's going on here????? It's not what I hope it isn't, is it?

Check rubber tube

No successful repair reported for this finding.

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Suggestion

cap, also check the rubber tube for the overflow...

what's going on here????? It's not what I hope it isn't, is it?

Check those areas periodically

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.

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Suggestion

Then clean up the residue as much as you can and check those areas periodically.

what's going on here????? It's not what I hope it isn't, is it?

Install headlight switch in 15 minutes

No successful repair reported for this finding.

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Reported fixes
0
Unsuccessful attempts
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Discussions
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Discussions that performed work without a confirmed outcome
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster

Also installed the new headlight switch in 15 minutes.

what's going on here????? It's not what I hope it isn't, is it?

Replace 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

Looks like you need to replace the cap with the updated one, part number ends in 03 (rather than 01).

what's going on here????? It's not what I hope it isn't, is it?

Suggestion

As Kevin said ^ replace the cap.

what's going on here????? It's not what I hope it isn't, is it?

Replace cap by porsche

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Suggestion

Although I think it's recommended to replace the cap by Porsche for 01 part numbers.

what's going on here????? It's not what I hope it isn't, is it?

Replace tank

No successful repair reported for this finding.

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Reported fixes
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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.

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Suggestion

Marc, I had to replace my tank on a 2000 C4.

what's going on here????? It's not what I hope it isn't, is it?
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.

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

  • Rennlist: 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: 20261026T133652Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Saw this a few days ago. Background is that i've had to add about 3/4 of a gallon of distilled water to the cooling system. There was some seepage where the cap is at the expansion tank. I'm hoping this isn't you know, THAT! I took a few photos short of taking the wheel off, which I intend to do tomorrow. so far, no coolant in the oil filler neck and I do not have a sudden rise or any fluctuations in the oil. The car doesn't run hot or cold. I've had my coolant purged/refilled twice already in my normal service routine (every 30K miles) Anyone have ideas or similar occurance? you can see the new catalytic convertor lower right

POST 3 / ORIGINAL POSTEROriginal post

Quotes source post: 6573310

Seems to be 996.106.447.01 cap is the original that came w/ the car, as is the expansion tank at 87K miles.

POST 4Original post

Looks like you need to replace the cap with the updated one, part number ends in 03 (rather than 01). Very common failure. The seal fails to hold pressure and allows large amounts of coolant to purge.

POST 5Original post

As Kevin said ^ replace the cap. Then clean up the residue as much as you can and check those areas periodically.

POST 6Original post

start with the least expensive..... cap, also check the rubber tube for the overflow... it shouldnt spill like that... to messy.

POST 7Original post

You can have the cap tested. There's an air hose adapter that dealers and some indies have. Although I think it's recommended to replace the cap by Porsche for 01 part numbers.

POST 8 / ORIGINAL POSTEROriginal post

Quotes source post: 6573564

are you saying that this is a TSB and i'll get a free replacement cap? Obviously, car out of warranty.

POST 9Original post

No, you have to pay the $15 yourself! If the cap doesn't fix it - then it's a split tank requiring replacement - $600+ incl labor

POST 11Original post

first I had my cap replaced (2 yrs or so ago) and recently my expansion tank as well..dealer smelt the leaking coolant right away...but compared to the worst (engine replacement) it isn't that bad.

POST 12Original post

hey jyoteen, Jarett from wayot. I have never seen the coolant on the tip but the coolant on the other part of the exhaust is common when the tank is cracked. I would try doing the cap first. If that doesnt work your going to need a tank. If you need anything let me know.

POST 13 / ORIGINAL POSTEROriginal post

UPDATE: Looks like it's the expansion tank. I got the cap, but before even installing it, I went to the garage and saw an actual puddle this time without any wet spots near the cap itself. I have an appointment tomorrow to get this taken care of. Also installed the new headlight switch in 15 minutes. The parts guy commented that I was lucky that both of the parts (switch and cap) lasted so long.

POST 14Original post

Beats putting in a new engine. Good to hear better news.

POST 15Original post

This thread reminded me to order a new cap, mine was a .00 but I have had no issue.

POST 16Original post

resurrecting this old thread ... but what is the difference in design between the 01 and now its the 04 caps (not 03 anymore)?

POST 17Original post

Quotes source post: 6577717

Marc, I had to replace my tank on a 2000 C4. solved a slow leak problem. now I am wondering if just the cap was at faault......

POST 18Original post

I have the 01 cap as well. Looked it up on Pelican Parts and they only have the 04 series caps. Is it recommended to do this proactively or re-actively? http://www.pelicanparts.com/cgi-bin/...06-447-04-M100 Pelican doesn't carry the 03 anymore.

POST 19Original post

You can get a new cap but you don't need to unless you're leaking coolant. It's $20 though so who cares. Suncoast has the 2001+ tank for $85 and the 98-00 tank for $200. It takes time to install it yourself but is not difficult, going to be pretty expensive at the dealer.

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