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Planet-9

Mayo in the oil cap

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Original source
11 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHMayo in the oil cap

Leading reported evidence

Check combustion products in the coolant

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

Did your mechanic check for combustion products in the coolant?

Mayo in the oil cap
Read full discussion summary

Leading evidence: 'Check combustion products in the coolant' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check combustion products in the coolant' (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.

Read captured replies

1 matching discussions · 11 captured posts examined · 1 partial discussions

Compare 3 other evidence results

Check coolant"

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

1 - ECU "Check coolant"

Mayo in the oil cap

Check oil at the drain

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

Check the oil at the drain.

Mayo in the oil cap

Use blackstone labs or another similar service

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

Use Blackstone Labs or another similar service for the UOA.

Mayo in the oil cap
Frequently discussed actions (4)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check combustion products in the coolant

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

Did your mechanic check for combustion products in the coolant?

Mayo in the oil cap

Check coolant"

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

1 - ECU "Check coolant"

Mayo in the oil cap

Check oil at the drain

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

Check the oil at the drain.

Mayo in the oil cap

Use blackstone labs or another similar service

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

Use Blackstone Labs or another similar service for the UOA.

Mayo in the oil cap
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.

  • Planet-9: 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: 20261026T130754Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

My first experience with a porsche was when I was about 18 - a family friend in rural south France took us for a spin in a black, air cooled 911 - it was incredible, overtaking 6 cars in one go. The sound and acceleration was blistering! 20 minutes later we'd pulled back in to the barn and were having aperitifs when, WHOOSH, a huge noise - we get to the car and 6 foot flames were shooting from the engine! After waiting what seems like an age for the hosepipe to start, the owner had to jump in the car to save the barn (which was attached to the house) from catching fire! As it turns out, the old rubber fuel line ruptured and caught fire on the engine block. Write off. So it seems my experience with black porsches hasn't moved on much. 10 or so years later, after owning my black 06 Cayman for 1 year, it's broken down 4 times and I spent the last day of my holiday on two tow trucks getting back home. As it happened: 1 - ECU "Check coolant" 2 - drunk 2 litres of distilled water & coolant 3 - managed to drive 50 miles or so, but started getting gunk dirty mayo under the oil filler cap. Watched temp gauge (via OBD) like a hawk, got to 87C but no higher. 4 - spoke to mechanic - instructed not to drive in case it's a leaky head gasket OR faulty oil cooler. What say you, planet-9 forum?

POST 2Original post

The mayo usually occurs when you drive short distances and don't get the engine temps up enough to get rid of moisture in the engine. Generally not something to worry about. However, since your Cayman is thirsty in addition to the mayo, I'd say you could have a head gasket issue.

POST 3Original post

Clearly, coolant is getting into the oil and a failed head gasket is the obvious cause. As per the advice given, don't attempt to drive it.

POST 4Original post

Ouch! Sorry to hear that. I agree with Trev450 (unfortunately): head gasket. Good luck.

POST 5Original post

Check the oil at the drain. Is it also intermixed?

POST 6Original post

Thanks for the replies - mmm...mechanic is taking a look today. It seems this isn't a rare issue, but it could mean one of two things - a bit of moisture, or something more serious. As it came on so fast with the coolant issue I'm not sure I can relax just yet. I'll post updates as I have them thanks

POST 7Original post

OK I have some good news - the mechanic has pressure tested the system, the oil, cylinders, and generally racked his brain and can't find a fault. Yay! I've been enjoying drinving it around recently, having been out of action for a few weeks. He's flushed the oil (<6 months since last change and it was quite black) and is doing a brand new coolant fix as I mixed types when I filled it up. Have just installed some DEPO LED tail lights and am loving the new look. What a relief!!

POST 8Original post

If not done already, get a used oil analysis. Did your mechanic check for combustion products in the coolant? There is a tester for that. Good luck.

POST 9Original post

I'll ask him next week - thanks Rob! Is there a link to the tester somewhere? What's it called?

POST 10Original post

Here is what I used to check for combustion products in the coolant ( blown head gasket ): http://www.amazon.com/UVIEW-560000-...NPDL76/ref=sr_1_1?ie=UTF8&qid=1430829922&sr=8-1&keywords=combustion+leak+tester Rob

POST 11Original post

Echoing the above, a combustion products test AND a used oil analysis would be a very good idea. Less than $100 to get both done yourself and you will have more diagnostic information. Use Blackstone Labs or another similar service for the UOA. Blackstone Labs

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