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YOUR RESEARCHCar Overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Reported repair
Check code was gone
Reported resolution
1
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0
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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.
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Car Overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: 'Check code was gone' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, the most frequently mentioned possible cause is 'before i add coolant back into the car' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check code was gone' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Check code was gone', supported by resolution reports in 1 discussions. 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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Reported cause · Original poster
I wanted to ask what the problem is before I add coolant back into the car.
Car Overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check moisture
Suggestion or failed attempt
No successful repair reported for this finding.
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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.
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Suggestion
Check for moisture under the carpet on the passenger side.
Car Overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace compared
Suggestion or failed attempt
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Reported fixes
0
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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.
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Suggestion
Pretty simple to replace compared to many other cars.
Car Overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace thermostat
Suggestion or failed attempt
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Suggestion
If you find that your water pump is faulty it is not going to hurt to replace the thermostat.
Car Overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use cheap "global odb ii" scanner
No successful repair reported for this finding.
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Suggestion
Start thinking more about it, the code is important, and because you are using a cheap "global ODB II" scanner, which cannot properly read or interpret many codes specific to the manufacture.
Car Overheating - 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.
20 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: 20261027T084359Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hey back with another problem. My car started overheating. My guess is that it's because the coolant that I added didn't mix with the OEM coolant and made the coolant gel like and got stuck somewhere. Atleast that's what I've read. Online about it. I don't think it's the thermostat because it reads the right temperature without any swings in temperature and the fans come on. The only other problem accompanying this is that the heat doesn't work on the car. I wanted to ask what the problem is before I add coolant back into the car. I'm in the process of doing a full coolant flush but I not all of the coolant came out and I have added distilled water into the coolant. And I let it idle for about for about 25 minutes.
There's a tool called a 'UView Airlift' that is a great way to flush the system and get the air out when you put coolant in. If you have access to one of those and an air compressor, it's a great help. Otherwise, check out these links:
Pelican Parts Tech Article:
https://www.pelicanparts.com/techarticles/Boxster_Tech/29-WATER-Flush/29-WATER-Flush.htm
Pedro's Garage:
Flush Coolant System
Burner's cars:
https://www.youtube.com/watch?v=whc8e6baACw
They have a little different perspective, but they are all good. Pick what works for you.
In your other thread you said you were loosing coolant.
Did you find out why you were loosing coolant???
You say your coolant gelled can you see gelled coolant????
Are you sure your coolant gelled or is it possible that your still loosing coolant?
Heater not working???
I am just guessing here but perhaps the heater core is leaking.
Check for moisture under the carpet on the passenger side.
I think the heater core is on the passenger side behind the dash.
Hopefully someone who knows for sure will confirm.
Ivory liquid soap.
I'm am being polite here, but I really suggest you just take it to a shop. If it is truly overheating and you are losing coolant, you have a much bigger issue going on. Unless you put Dexcool in the system I very much doubt you have an issue with the coolant itself.
1-2 hours of proper diag is going to be cheaper then a replacement engine, which it sounds like you may be on the road to soon.
Heater core is in the center of the car. You get to it by removing the battery, it's under a cover. Pretty simple to replace compared to many other cars. I think it's one thing they got right in these cars.
Yeah it looks like before I was loosing coolant out of the cap since it was coming from the overflow tube. So my guess is the cap wasn't sealing. I can not see any gel anywhere, I'm just guessing in that one since it only started happening whenever I added coolant to it.
In your other post you also reported a P0117 code for temp. sensor malfunction.
Do you still get that code?
Coolant coming out of both the overflow and the cap.
Caused by overheated expanding coolant?
Bad head gasket,rare on these cars.
Air trapped in the system.
bad thermostat.
bad water pump.
Starting to sound like you have an issue with the water pump not working.
The last time I checked the code was gone. The only code I have now is a code for manufacturer control whatever that means. And yeah I was thinking that it could also be the water pump whenever I searched up some stuff about these issues. Should I also replace the thermostat while I'm at it?
The first thing you really need to do is find the cause of your coolant lose--- overheating issue.
Until you know the true cause of the problem you could chase your tail and spend lots of money replacing parts and buying coolant needlessly.
"The first thing to do is pressure test the coolant system to see if you still have a leak."
That is actually a simple easy test. You just need a coolant system tester.
Harbour Frieght has them for around $90.00 I think it is.
you can pressure test the system and the cap.
Or find a shop that will do it.
If the system checks out then you need to find out if the water pump is faulty.
The fact that you heater does not work makes me think your water pump is faulty.
"But I am just guessing"
If you find that your water pump is faulty it is not going to hurt to replace the thermostat.
You could replace it with a low temp thermostat then the car should run a little cooler.
What is the code your getting???
P1531 indicates the triggering of the Bank 1 VarioCam actuator with no active position taken.
Either an open circuit (wiring issue) or defective actuator.
Lol I'm not doing anything right now. Just continuing where I left off with the coolant flush. I did read what you said about the code. Its weird that mine just says manufacturer control. That's why I didn't think too much of it.
Start thinking more about it, the code is important, and because you are using a cheap "global ODB II" scanner, which cannot properly read or interpret many codes specific to the manufacture. You need a Porsche specific scan tool to correctly address the vehicle's issues.
