6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
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YOUR RESEARCH997.2 Cooling System - Airlock? - Page 1 - Porsche General - PistonHeads UK
Leading reported evidence
Fill car back up
Performed · outcome unconfirmed
No successful repair reported for this finding.
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0
Unsuccessful attempts
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Performed · outcome unconfirmed · Original poster
I contacted them and long story short, we ended up filling the car back up to max at the dealer.
997.2 Cooling System - Airlock? - Page 1 - Porsche General - PistonHeads UK
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Leading evidence: 'Fill car back up' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Fill car back up' (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 · Original poster
On taking my car into a main dealer for an MoT I asked them to look at the coolant system as it was slowly but steadily leaking coolant even after I'd replaced the cap.
997.2 Cooling System - Airlock? - Page 1 - Porsche General - PistonHeads UK
Fill method
Suggestion or failed attempt
No successful repair reported for this finding.
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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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Suggestion
Pretty sure the coolant fill method for the OPC is the same on the 911 as the Cayman and is vaccum filling.
997.2 Cooling System - Airlock? - Page 1 - Porsche General - PistonHeads UK
Fill system
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
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 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Having had the system on my GT3 drained in order to replace a tiny hose that sits on top of the engine, I can confirm that there is no way on God' Earth that you can re-fill the system with any other method, but vacuum.
997.2 Cooling System - Airlock? - Page 1 - Porsche General - PistonHeads UK
Repair with a 5 litre "air lock"
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Discussions that contain suggestions
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Suggestion · Original poster
They managed to give me the car back after the first repair with a 5 litre "air lock".
997.2 Cooling System - Airlock? - Page 1 - Porsche General - PistonHeads UK
Fill system
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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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.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Having had the system on my GT3 drained in order to replace a tiny hose that sits on top of the engine, I can confirm that there is no way on God' Earth that you can re-fill the system with any other method, but vacuum.
997.2 Cooling System - Airlock? - Page 1 - Porsche General - PistonHeads UK
Replace cap
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
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Discussions that performed work without a confirmed outcome
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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.
Performed · outcome unconfirmed · Original poster
On taking my car into a main dealer for an MoT I asked them to look at the coolant system as it was slowly but steadily leaking coolant even after I'd replaced the cap.
997.2 Cooling System - Airlock? - Page 1 - Porsche General - PistonHeads UK
Replace tiny hose
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
Having had the system on my GT3 drained in order to replace a tiny hose that sits on top of the engine, I can confirm that there is no way on God' Earth that you can re-fill the system with any other method, but vacuum.
997.2 Cooling System - Airlock? - Page 1 - Porsche General - PistonHeads UK
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.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 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: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi everyone
I've had my 911 for around 9 years and I've always had intermittent problems with the cooling system on my 997.2.
Usually small leaks or coolant depleting over time.
On taking my car into a main dealer for an MoT I asked them to look at the coolant system as it was slowly but steadily leaking coolant even after I'd replaced the cap.
When I got the car back I was told some work had been done under warranty and it was fixed.
On arriving home I noticed the coolant level was about 4 inches below minimum in the tank, and it's a big tank so probably around 3l down.
I contacted them and long story short, we ended up filling the car back up to max at the dealer.
Took about 2.5l and they blamed it on an "air lock". Seemed a bit odd that they didn't detect or remediate this after fixing the system the first time, but what do I know.
I took the car on a trip the next weekend and only when I was leaving to return did I notice the tank had dropped to about the same level again.
Looked like it had dumped another 2.5l of coolant. I stuck 1l back in (as I had a bottle in the front) and drove it home, booked it back into the dealer.
I took the car in Monday, Tuesday they told me they'd found nothing wrong with it but they wouldn't release the car.
Friday they contacted me and said the car was ready to be picked up and again, no faults detected.
I'm left with 2 options here -
1. They're lying to me and they've fixed something over the past 5 days
2. They managed to give me the car back after the first repair with a 5 litre "air lock".
Is that even a thing? Is it possible a main dealer drained, fixed a coolant system problem and only refilled it 1/2 without realising it was full of air?
If something takes 10l and you only get 5l in it before its's hitting max, something is wrong.
I'm not a technician or mechanic but that seems incredibly unlikely.
Either way it's looking unlikely they'll ever give me a straight answer, or I'll ever go back there again.
Edited by D1m3b4g on Friday 20th August 17:35
Pretty sure the coolant fill method for the OPC is the same on the 911 as the Cayman and is vaccum filling. If they did that, there wouldn't be an air lock. I wonder if they did work and didn't drain the system and then just topped it up and air which has escaped the system once it has been driven has caused the level to drop. If there is no evidence of a leak (and they are normally fairly noticable), I suspect they didn't do the vaccum fill and the drops have been due to air. Not confidence inspiring from them, but then that isn't a huge surprise.
Having had the system on my GT3 drained in order to replace a tiny hose that sits on top of the engine, I can confirm that there is no way on God' Earth that you can re-fill the system with any other method, but vacuum. Filling it up the normal way under gravity (like on most modern cars) and hoping for the best will lead to a massive airlock...
