11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCoolant on garage floor - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported or suspected cause
failed tstat
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
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 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
Mine did the same thing recently, turned out to be a failed TStat.
Coolant on garage floor - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'failed tstat' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'failed tstat' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check paper towel......my guess is you'll find it wet' (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.
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
In my case, my water pump ALSO failed and was replaced too.
Coolant on garage floor - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Run errand this morning
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 ran an errand this morning and when I got back I see there is some coolant on the garage floor.
Coolant on garage floor - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use on any coolant system
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.
Coolant on garage floor - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check paper towel......my guess is you'll find it wet
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
Park and as it cools down check the paper towel......my guess is you'll find it wet with coolant.
Coolant on garage floor - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Fill tank
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
Leave everything out of the trunk, fill the tank to the proper level, wad up some paper towel around the tank bottom and go for a ride to heat the system up.
Coolant on garage floor - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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.
11 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261026T112012Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi All,
I ran an errand this morning and when I got back I see there is some coolant on the garage floor. Maybe .25 cup or so? I don't see any moisture around the cap in the trunk, but I haven't removed the carpet to look underneath yet.
I'd say from the location of the puddle, it's coming from the rear, right of the underside.
What am I looking at as far a repairs go?
Thanks,
Agreed. Run it hot and then get out to look for leaks. The coolant overflow tube is in the location you are describing, small black hose open to atmosphere near right rear well. Mine did the same thing recently, turned out to be a failed TStat.
Sent from my POCOPHONE F1 using Tapatalk
Pressure test the coolant system then you will know what the issue is.
Harbor Freight sells a coolant system pressure tester for a reasonable price.
Their kit can be used on any coolant system.
IF your trunk carpet is dry, then YOU MUST remove the trunk carpet AND the raised floor board, under the carpet. There you will probably find a puddle(s) of coolant on the metal trunk floor, some of which has found it's way to your garage floor. That's exactly what mine did. (1998)
If so, then like mine, you might have developed "spider cracks" in the coolant tank that ONLY expand and leak when the system is hot and pressure builds. Leave everything out of the trunk, fill the tank to the proper level, wad up some paper towel around the tank bottom and go for a ride to heat the system up. Park and as it cools down check the paper towel......my guess is you'll find it wet with coolant.
Don't cheap out....buy a OEM Porsche coolant tank, not the crap cheap ones. I had my "indy" Porsche shop replace mine....total cost time/tank was about $1,000. Others have done it themselves, but I have no way of lifting the car to work from under. Some say it can be done from above, but I bite the bullet and pay someone else...lol.
Report back with what you discover.
Glad you found the issue. I don't want to give you "my bad luck" ...BUT.... In my case, my water pump ALSO failed and was replaced too. Two weeks later, I discovered that my coolant tank began leaking from those spider cracks I described in my previous post. Fortunately, those two repairs have been the only repairs my 98 has needed in the 23 years I've driven it. (My 98 just turned 90,000 miles old - 4,000 miles/yr average)
