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Coolant smell... expansion tank already replaced

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YOUR RESEARCHCoolant smell... expansion tank already replaced

Leading reported evidence

Check everywhere

Suggestion or failed attempt

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Unsuccessful attempts: 1
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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: 1

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Suggestion
Basically, you drive the car around a bit and then come home, turn off the lights, put on the goggles, use the blacklight and check everywhere near and around your coolant.
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Coolant smell... expansion tank already replaced

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Leading evidence: 'Check everywhere' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check everywhere' (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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Use blacklight

Suggestion or failed attempt

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Unsuccessful attempts: 1
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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
Basically, you drive the car around a bit and then come home, turn off the lights, put on the goggles, use the blacklight and check everywhere near and around your coolant.
Original post Read captured discussion
Coolant smell... expansion tank already replaced

Use since the tank replacement

Suggestion or failed attempt

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
Could some spilled coolant still be burning off after 2 weeks of use since the tank replacement???
Original post Read captured discussion
Coolant smell... expansion tank already replaced

Replace due

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 1
Unsuccessful attempts: 1
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Discussions that report an unsuccessful attempt: 1

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Unsuccessful attempt · Original poster
I recently had my expansion tank and cap replaced due to a small crack that I didn't want to get any worse. However, I am still getting a coolant smell coming from behind the left side rear tire.
Original post Read captured discussion
Coolant smell... expansion tank already replaced

Frequently discussed actions (4)

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

Check everywhere

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
Basically, you drive the car around a bit and then come home, turn off the lights, put on the goggles, use the blacklight and check everywhere near and around your coolant.
Original post Read captured discussion
Coolant smell... expansion tank already replaced

Replace due

No successful repair reported for this finding.

0
Reported fixes: 1
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that report an unsuccessful attempt: 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.

Unsuccessful attempt · Original poster
I recently had my expansion tank and cap replaced due to a small crack that I didn't want to get any worse. However, I am still getting a coolant smell coming from behind the left side rear tire.
Original post Read captured discussion
Coolant smell... expansion tank already replaced

Use blacklight

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
Basically, you drive the car around a bit and then come home, turn off the lights, put on the goggles, use the blacklight and check everywhere near and around your coolant.
Original post Read captured discussion
Coolant smell... expansion tank already replaced

Use since the tank replacement

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
Could some spilled coolant still be burning off after 2 weeks of use since the tank replacement???
Original post Read captured discussion
Coolant smell... expansion tank already replaced

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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.

4 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: 20261027T022239Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Guys, I recently had my expansion tank and cap replaced due to a small crack that I didn't want to get any worse. However, I am still getting a coolant smell coming from behind the left side rear tire. There don't appear to be any leaks, and the system seems to be holding pressure very well... I removed the cap 5 hours after my morning commute and got a pronounced hiss, releasing the system pressure. I might have a little bit of air left in the system after I had ALL of the coolant flushed, but would this cause a smell??? In any case, I will run it with the bleeder valve open tomorrow to purge any more air. Any other likely culprits for this smell??? Could some spilled coolant still be burning off after 2 weeks of use since the tank replacement??? Thanks

POST 2Original post

Is there some coolant left in the engine bay slowly cooking off? Air in the system wouldn't make it smell.

POST 3 / ORIGINAL POSTEROriginal post

Cooking is possible... how long do you think the smell would persist???

POST 4Original post

That'd be my sneaking suspicion as well. Of course, if it persists for more than a week or two, I'd investigate the technique written about on a Porsche blog (and cited here also) that involves using a little fluorescent fluid mixed into the coolant, a blacklight, and some goggles to find the source of any potential leak. Basically, you drive the car around a bit and then come home, turn off the lights, put on the goggles, use the blacklight and check everywhere near and around your coolant. I know, sounds like overkill, but just passing the gospel.

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