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Source of water intrusion - any guesses?

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15 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHSource of water intrusion - any guesses?

Leading reported evidence

Clean sunroof lines

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 removed most of the rear interior and completely cleaned the sunroof lines but most of the water is actually dripping out of the junction between the sunroof cassette and the plastic pieces that snap into it.

Source of water intrusion - any guesses?
Frequently discussed work

Check with the community

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 · Original poster

Before I start tearing apart the forward carpeting to see where it's coming from, I wanted to check with the community to see if a) anyone has experienced the same thing and, b) what the likely source is so I can effect the repair.

Source of water intrusion - any guesses?
Read full discussion summary

Leading evidence: 'Clean sunroof lines' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'sunroof issue' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check with the community' (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 · 15 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Use piece of refrigerator water line

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 · Original poster

I used a piece of refrigerator water line from the end of the nozzle that reduces the flow rate and pressure (due to bleed from the hand held nature of the junction).

Source of water intrusion - any guesses?

sunroof issue

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

It�s probably a sunroof issue, but there is a rubber plug in the firewall that can be removed or dislodged when someone wants to run wires to the trunk.

Source of water intrusion - any guesses?

Check with the community

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 · Original poster

Before I start tearing apart the forward carpeting to see where it's coming from, I wanted to check with the community to see if a) anyone has experienced the same thing and, b) what the likely source is so I can effect the repair.

Source of water intrusion - any guesses?

Run water into the sunroof panel and it seems

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

Is the rear pipe one piece from the sunroof to the rear wheel arch, I've had a problem with water in the rear passenger footwell ( Uk car) and it gets wet under the rear seat bases aswel and also the carpet trim over the rear shocks behind the rear seats it driving me crazy, I was going to start removing the rear side trims to check if the pipe has an elbow fitting that has come loose , I can run water into the sunroof panel and it seems to drain out , I'm getting a bit stuck for ideas , maybe the rear window seal has has failed and started to leak ??

Source of water intrusion - any guesses?
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 with the community

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 · Original poster

Before I start tearing apart the forward carpeting to see where it's coming from, I wanted to check with the community to see if a) anyone has experienced the same thing and, b) what the likely source is so I can effect the repair.

Source of water intrusion - any guesses?

Clean sunroof lines

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 removed most of the rear interior and completely cleaned the sunroof lines but most of the water is actually dripping out of the junction between the sunroof cassette and the plastic pieces that snap into it.

Source of water intrusion - any guesses?

Run water into the sunroof panel and it seems

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

Is the rear pipe one piece from the sunroof to the rear wheel arch, I've had a problem with water in the rear passenger footwell ( Uk car) and it gets wet under the rear seat bases aswel and also the carpet trim over the rear shocks behind the rear seats it driving me crazy, I was going to start removing the rear side trims to check if the pipe has an elbow fitting that has come loose , I can run water into the sunroof panel and it seems to drain out , I'm getting a bit stuck for ideas , maybe the rear window seal has has failed and started to leak ??

Source of water intrusion - any guesses?

Run wires

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

It�s probably a sunroof issue, but there is a rubber plug in the firewall that can be removed or dislodged when someone wants to run wires to the trunk.

Source of water intrusion - any guesses?

Use piece of refrigerator water line

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 · Original poster

I used a piece of refrigerator water line from the end of the nozzle that reduces the flow rate and pressure (due to bleed from the hand held nature of the junction).

Source of water intrusion - any guesses?
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.

sunroof issue

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

It�s probably a sunroof issue, but there is a rubber plug in the firewall that can be removed or dislodged when someone wants to run wires to the trunk.

Source of water intrusion - any guesses?
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.

15 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: 20261026T172408Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

So I have a driveway that is a 15� slope and when I leave my '99 C2 on it in the rain, water intrudes into the driver's side, rear footwell. Before I start tearing apart the forward carpeting to see where it's coming from, I wanted to check with the community to see if a) anyone has experienced the same thing and, b) what the likely source is so I can effect the repair. Any help greatly appreciated!

POST 2Original post

The sunroof or cowl area drains r clogged. Its a common issue so just search for the drain diagram.

POST 3Original post

Which way is the driveway sloped 15 degrees up to the house or down? It�s probably a sunroof issue, but there is a rubber plug in the firewall that can be removed or dislodged when someone wants to run wires to the trunk. That is a place to look as well if your driveway slopes up.

POST 4Original post

[Image-only post; no author-written text. Original image references:] https://cimg3.ibsrv.net/gimg/rennlist.com-vbulletin/759x799/996_drainage_600ea6b52ef22a0b5331fb741fff4ebbc0eef6e8.jpg

POST 5Original post

The main brain is under your seat. Get that carpet out and make sure it all get dried out ASAP!

POST 6 / ORIGINAL POSTEROriginal post

Here's what it looks like. I cleared the rear drains late last year and *thought* I cleared the front ones. I'm thinking I missed one in front on the driver's side.

POST 7 / ORIGINAL POSTEROriginal post

Quotes source post: 17227533

Yeah, I know. Fortunately I caught it when only about a tablespoon of water was in the rear foot well and with the car on a 15� nose up angle, it bypassed the brain. I'm going to get one of those waterproof boxes for it in any event.

POST 8 / ORIGINAL POSTEROriginal post

Ok, so the update is that 24 hours after backing into the garage, there was STANDING WATER in the cowl on the driver's side and plenty of redwood leaves (I'm in Marin County and my house is surrounded by those majestic trees) that took some time to clear the drain on that side. Hit both sides of the sunroof drains and cowl drains with compressed air and then wet tested to make sure the drains were clear. Seems that both the cowl and the driver's side sunroof drains had *some* debris (especially the cowl) and now all is good. The rains stop in April (or early May at the outside), and there's no issues in the driveway until October/November. Since my garage was basically built for a car the size of a VW bug, I sometimes leave the p-car in the driveway overnight so I can work on the bikes and other things.

POST 9Original post

Hopefully with the compressed air you didn�t blow the clogged pipe off of the fitting for the sunroof I did that once and only once. String trimmer line is my choice now to ensure it isn�t clogged.

POST 10Original post

Is the rear pipe one piece from the sunroof to the rear wheel arch, I've had a problem with water in the rear passenger footwell ( Uk car) and it gets wet under the rear seat bases aswel and also the carpet trim over the rear shocks behind the rear seats it driving me crazy, I was going to start removing the rear side trims to check if the pipe has an elbow fitting that has come loose , I can run water into the sunroof panel and it seems to drain out , I'm getting a bit stuck for ideas , maybe the rear window seal has has failed and started to leak ??

POST 11Original post

If memory serves me correct it passes through the body in the rear side way in the back by the rear side panel vents. I believe it connects to a metal pipe that allow it to pass outside. If the carpet is wet all the way up on the back deck it also could be the weep channel under the back window or the back window itself or maybe rear wiper if there is one.

POST 14 / ORIGINAL POSTEROriginal post

Quotes source post: 17230336

I used a piece of refrigerator water line from the end of the nozzle that reduces the flow rate and pressure (due to bleed from the hand held nature of the junction). Wet tested it and it all drained as normal.

POST 15Original post

This happens to my car. I removed most of the rear interior and completely cleaned the sunroof lines but most of the water is actually dripping out of the junction between the sunroof cassette and the plastic pieces that snap into it. The sunroof drain lines slip over the nipple on the plastic pieces. For some reason no matter what I do I cannot seal up that junction well enough to stop the leak. I'm fairly certain this is your problem as well if the rear drains are clean.

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