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Gas expansion tank issue?

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

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YOUR RESEARCHGas expansion tank issue?

Reported or suspected cause

pressure not being able

Reported cause

No successful repair reported for this finding.

1
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0
Suspected cause
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Reported fixes
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Discussions that report identifying a cause
1

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Reported cause · Original poster

Ive been told this is due to pressure not being able to be released in the gas expansion tank, so it blows out the spout.

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Gas expansion tank issue?
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Leading evidence: 'pressure not being able' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'pressure not being able' (1 discussions; 1 report identifying it and 0 suggest it). 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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1 matching discussions · 6 captured posts examined · 0 partial discussions

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.

pressure not being able

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 · Original poster

Ive been told this is due to pressure not being able to be released in the gas expansion tank, so it blows out the spout.

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Gas expansion tank issue?
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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.

6 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: 20261027T061840Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Everyone, When i fill up my gas tank, especially the closer it is to empty, i always get gas coming back out. Ive been told this is due to pressure not being able to be released in the gas expansion tank, so it blows out the spout. Is this true? Whats clogged? How do i fix it?

POST 3 / ORIGINAL POSTEROriginal post

Sorry, should have noted: 2001 996 c2 tiptronic

POST 4Original post

Slow the flow as you get close to full...Works for me.

POST 5 / ORIGINAL POSTEROriginal post

The blowout actually occurs at start of filling up not end

POST 6Original post

Many of the cars with modern smog stuff have a vent line that goes from the top of the tank to the filler, if your in an area without vapour collecting nozzles it may not be venting correctly during fill. Sometimes mine needs the nozzle slightly pulled out to make it happy. (03 Cab C4 )

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