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YOUR RESEARCH08 boxster overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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1st
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Reported cause · Original poster
This issue is the 1st to fix on this long restoration.
08 boxster overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
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Leading evidence: '1st' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is '1st' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check thermostat' (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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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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Reported cause
Last yr when I was bringing my 928 back to life, I just drove around the neighborhood until she proved to be reliable enough to venture further out.
08 boxster overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace along
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Performed · outcome unconfirmed · Original poster
I'm thinking the thermostat isn't opening and probably needs to be replaced along with the temp sensor.
08 boxster overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Check thermostat
Suggestion or failed attempt
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08 boxster overheating - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Replace temp sensor see if
Suggestion or failed attempt
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Suggestion · Original poster
So maybe replace temp sensor see if that was the electrical burn I was smelling.
08 boxster 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.
6 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 1 discussions
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0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
So I purchased a 2008 boxster w 42000 miles from a scrapyard. Took for its maiden voyage on the highway and the engine overheated. I added some coolant before leaving cause the low coolant light was blinking. About 40mins in the temp gauge jumped and was pinned to the right with no gradual increase. I also smelled electrical burning. Warning light blinked engine too hot. Immediately shut down...cooled off got it home. The 'eng.too hot 'came on again as I pulled in the garage. Hope I didn't do ant damage to the engine. Today it cranked right over....let in run half hr and the temp gauge didn't move. This issue is the 1st to fix on this long restoration. I'm thinking the thermostat isn't opening and probably needs to be replaced along with the temp sensor. Or...faulty temp sensor isn't allowing the thermostat to open....no signal. Any help would be great. V
The electricl burning smell is not good, but let's start with 2 basic questions:
Did you use European antifreeze? Mixing regular antifreeze with European blend will cause a serious problem - your mixure becomes a sludge that obviously doesn't flow very well thru the system. I'm not going to get into which brand of Euro antifreeze you should use, as long as you used it vs regular you'll be OK.
Did you 'burp' the system when you added antifreeze or just dump a bunch in and drive? If you didn't burp the system, you could have an air bubble in the system that could be caught in a cyl head. This will cause an overheating issue as a hot spot forms where the bubble is and that can lead to serious / expensive consequences. Don't be driving around for long periods with an overheating issue. Search on 'burp' to find the exact procedure.
If these 2 questions were answered correctly, then you can check the thermostat. Just wanted to start basic and move up the diagnosis chain.
If you're having electrical issues, it would be wise to toss a fire extinguisher in the car. You don't need a car-b-q situation. And hopefully you're not venturing too far from home on your test drives. Last yr when I was bringing my 928 back to life, I just drove around the neighborhood until she proved to be reliable enough to venture further out.
Trust is earned.
I just added some coolant before the drive, didn't burp. Don't know what kind of coolant was in it before. I think I will try and resolve the gauge issue first cause now the gauge is dead....didn't move after the car idled for half an hour. So maybe replace temp sensor see if that was the electrical burn I was smelling. Then add coolant and burp the system. If it still over heats check the thermostat. I'm thinking thermostat only cause the car was abandoned and probably not been driven in years.
I know its not electrical...i just think I have multiple issues, a dead temp gauge and over heating, just going to do the temp sensor, water pump and thermostat and maybe the center radiator upgrade while I'm at it. I added zerex G40 coolant...pink.
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