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What are the indications of a leaking coolant tank?

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

Discussion summary

YOUR RESEARCHWhat are the indications of a leaking coolant tank?

Reported or suspected cause

coolant cap

Reported cause

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1
Identified cause
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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 report identifying a cause
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Reported cause

I finally dropped it off with them and viola, it was the coolant cap.

Original post Read captured discussion
What are the indications of a leaking coolant tank?
Frequently discussed work

Use coolant

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Discussions that contain suggestions
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Suggestion

Mine just appeared to be slowly using coolant.

Original post Read captured discussion
What are the indications of a leaking coolant tank?
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Leading evidence: 'coolant cap' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'coolant cap' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Use coolant' (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 coolant

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Discussions
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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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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

Mine just appeared to be slowly using coolant.

Original post Read captured discussion
What are the indications of a leaking coolant tank?
Frequently discussed actions (1)

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

Use coolant

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

Mine just appeared to be slowly using coolant.

Original post Read captured discussion
What are the indications of a leaking coolant tank?
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.

coolant cap

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

I finally dropped it off with them and viola, it was the coolant cap.

Original post Read captured discussion
What are the indications of a leaking coolant tank?
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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.

9 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: 20261027T053112Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I've seen several posts indicating that their coolant tanks were leaking. Where do these leaks occur? At the hose connection, cap, or is it a cracked tank?

POST 2Original post

On my 1999 C2 the was a very small crack around the filler cap neck.

POST 3Original post

Mine had a small crack at the base of the tank, presented with small spots of coolant on the headers and a smell of coolant. This was a very small leak as the coolant level had barely dropped.

POST 4Original post

I didn't see the crack but I saw coolant (very samll drop at first) on the ground just below the driver side exhaust tip. Within a couple weeks it lost it all and the floor was a mess. Pic attached of the last day.

POST 5Original post

I had the unfortunate experience of my wife coming home and saying "your $90,000 car is leaking fluid all over our garage floor." Ouch.

POST 6Original post

Had 4 tanks on my 99. Cracks developed from bottom top and sides of the tank. There are like 4 generations of tanks. Make sure you get a new cap at the same time, I think it's included in the price of the part.

POST 8Original post

Mine went from a slow drip to "holy crap, I think a dam burst!"

POST 9Original post

Mine just appeared to be slowly using coolant. I saw some caked coolant around the cap and talked with the dealer about it. The first thing they had me do was ensure it wasn't cross-threaded (it wasn't, and it kept on leaking). I finally dropped it off with them and viola, it was the coolant cap. So, don't assume it's something serious.

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