10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCoolant Leakage
Leading reported evidence
Clean debris
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed · Original poster
The temperature of the motor is about 185 to 190 not really over heating as I have cleaned all the debris from the radiators.
Leading evidence: 'Clean debris' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'culprit' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check cap itself also, should be a blue cap' (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.
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed · Original poster
I have re filled the reservoir to the high line and the same will happen.
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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
On my '99 with 120,000 I had to replaced the oil and water O-rings.
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Discussions that suspect a cause
1
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Suspected cause
I'm inclined to believe that the reservoir tank is more likely the culprit.
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Discussions that contain suggestions
1
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Suggestion
Check the cap itself also, should be a blue cap with an -04 part number.
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.
10 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Pelican Parts: 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: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Coolant level goes down and the warning light for low coolant comes on. I have re filled the reservoir to the high line and the same will happen. Has any one else had a issue like this one? I can not see a leek in any of the lines. The coolant just from the reservoir will be on the ground. The temperature of the motor is about 185 to 190 not really over heating as I have cleaned all the debris from the radiators.
Dan Sorenson
This is a bad sign. Check your oil! These engine have a history of failures called 'intermix' where oil and coolant mixes due to cracked head, broken cylinder or the heat exchanger failing. Search 996 engine failures or intermix and read up on your problem.
If your oil looks like brown or tan goo ...
If the coolant cap is venting the coolant dumps through a tube which half the time dumps on coil #1.....
Older caps are known to prematurely vent.....replace it with the most current part number....
Yes check the oil too......
It sounds like of the coolant you are seeing on the ground is under the left rear......yes?
Any coolant near the right side sway bar mount area or bell house?
If you see anything get an inspection camera or mirror and look forward of the A/C compressor at the base of oil cooler where it sits in on top the right side of the block.
?
On my '99 with 120,000 I had to replaced the oil and water O-rings. Coolant was weeping past the water O-rings.
You also might look up at the front under the radiators. Especially if you bumped anything with the front end.
I trusted a parking guide at an event once. I managed to bump the left front on a root. It bent the radiator mount enough to twist the radiator and break the plastic to alum seal.
Anyone need a repairable 996 radiator?
Yes it is from the Left side same side as the reservoir tank it will drip out just under the left exhaust pipe. This motor was replaced at 60 thousand miles I do not have any water or tan gue in the motor oil I just hope this is not the case of starting to go bad... I only have 72K on this motor.
Dan
Dan,
In my first post I missed the part of coolant on the ground. I'm inclined to believe that the reservoir tank is more likely the culprit. These are what Porsche refers to as 'wear items'. I'd suggest a pressure test of the system before you start replacing bits. Could be a hose as well from the reservoir or a clamp. Check the cap itself also, should be a blue cap with an -04 part number.
Tony
The tank lives in a hostile environment above one of the HOT mufflers. This ages the tank making it brittle and often turning it yellow. You don't say what year yours is. The older 99-2001 have gotten expensive. The newer ones are a little cheaper.
Read this
Pelican Porsche Tech Article - Coolant Tank Replacement - Porsche 911 Carrera - Porsche 996 Carrera (1998-2005), Porsche 997 Carrera (2005-2008)
If your coolant tank is not leaking it can be your coolant cap not holding pressure. also at times there is a bleeder valve on top of coolant tank that has 7mm bolts holding it down. These bolts may come loose at times.
This is a source reference. Confirm exact model applicability in the original material.
