6 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHRed oil in coolant and vehicle not starting when hot!
Leading reported evidence
Disconnect battery terminal
Performed · outcome unconfirmed
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 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
I disconnected the battery terminal for 10 min, ran car for 10-15min and 2-3 miles.
Red oil in coolant and vehicle not starting when hot!
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Leading evidence: 'Disconnect battery terminal' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'from ecu as a last option' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Disconnect battery terminal' (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.
Replace when the transmission was rebuilt, the transmission oil cooler
Performed · outcome unconfirmed
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 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
When the transmission was rebuilt, the transmission oil cooler was replaced with a new one as well but since those guys did manage the broke the engine as well (overheated because they couldn't fill the coolant properly to the car), who knows whether they somehow broke the brand new oil cooler as well
Red oil in coolant and vehicle not starting when hot!
Run car
Performed · outcome unconfirmed
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 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
I disconnected the battery terminal for 10 min, ran car for 10-15min and 2-3 miles.
Red oil in coolant and vehicle not starting when hot!
from ecu as a last option
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
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 suspect a cause
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.
Suspected cause · Original poster
The mechanic says they suspect from ECU as a last option which I'm not that sure although had some similar issue like this happened because of engine air blower going out like 10 years ago with similar symptoms so who knows
Red oil in coolant and vehicle not starting when hot!
Fill coolant properly
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 · Original poster
When the transmission was rebuilt, the transmission oil cooler was replaced with a new one as well but since those guys did manage the broke the engine as well (overheated because they couldn't fill the coolant properly to the car), who knows whether they somehow broke the brand new oil cooler as well
Red oil in coolant and vehicle not starting when hot!
Fill coolant properly
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 · Original poster
When the transmission was rebuilt, the transmission oil cooler was replaced with a new one as well but since those guys did manage the broke the engine as well (overheated because they couldn't fill the coolant properly to the car), who knows whether they somehow broke the brand new oil cooler as well
Red oil in coolant and vehicle not starting when hot!
Replace but still wanted
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 · Original poster
As far as I know the speed signal is received from the crank sensor which we replaced but still wanted to know whether there is any other sensor related with car's speed where the transmission might be getting data from?
Red oil in coolant and vehicle not starting when hot!
Replace crank sensor
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 · Original poster
At first it was happening rarely but after changing the crank sensor, it started to happen all the time and we see no signal from crank sensor errors as well.
Red oil in coolant and vehicle not starting when hot!
Replace crank sensor (2 times) we
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 · Original poster
After replacing the crank sensor (2 times) we replaced fuel filter, Alternator Y cable, spark plugs, Ignition Switch and now will change the Fuel Pump as well.
Red oil in coolant and vehicle not starting when hot!
Replace fuel pump as well
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 · Original poster
After replacing the crank sensor (2 times) we replaced fuel filter, Alternator Y cable, spark plugs, Ignition Switch and now will change the Fuel Pump as well.
Red oil in coolant and vehicle not starting when hot!
Replace when the transmission was rebuilt, the transmission oil cooler
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
When the transmission was rebuilt, the transmission oil cooler was replaced with a new one as well but since those guys did manage the broke the engine as well (overheated because they couldn't fill the coolant properly to the car), who knows whether they somehow broke the brand new oil cooler as well
Red oil in coolant and vehicle not starting when hot!
Run values scan
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
When I plug in my Durametric (Enthusiast Version) and run the values scan with the engine running and up to temp, both oil and coolant temps show they are normal and reading fine.
Red oil in coolant and vehicle not starting when hot!
Use car (apart the covid) thanks
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 · Original poster
For the last few years, I could barely use the car (apart the covid) thanks to some issues escalated because of some incompetent mechanics that I choose so in the end, I decided that it would be wise to get some advise from such a great community in here.
Red oil in coolant and vehicle not starting when hot!
Reported and suspected causes (1)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
from ecu as a last option
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.
Suspected cause · Original poster
The mechanic says they suspect from ECU as a last option which I'm not that sure although had some similar issue like this happened because of engine air blower going out like 10 years ago with similar symptoms so who knows
Red oil in coolant and vehicle not starting when hot!
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.
6SpeedOnline: 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: 20261026T200546Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi There,
I'm a long time lurker of this forum and more than 10 years owner of a 1998 Porsche 996 Carrera Tiptronic car. For the last few years, I could barely use the car (apart the covid) thanks to some issues escalated because of some incompetent mechanics that I choose so in the end, I decided that it would be wise to get some advise from such a great community in here.
There's a long story of multiple times of engine rebuild and than a transmission rebuild on the car, which I don't want to bother you but in the end, I've 3 main issues which couldn't solve for a while :
1) Last time I drove the car, the rev counter was bouncing a few hundred rpms up and down while driving and we found a fault code on Transmission which says "Speed Signal <- DME Control Unit". As far as I know the speed signal is received from the crank sensor which we replaced but still wanted to know whether there is any other sensor related with car's speed where the transmission might be getting data from?
2) When the car gets into the operating temperature and you shut it down, it's nearly impossible to restart it. At first it was happening rarely but after changing the crank sensor, it started to happen all the time and we see no signal from crank sensor errors as well. After replacing the crank sensor (2 times) we replaced fuel filter, Alternator Y cable, spark plugs, Ignition Switch and now will change the Fuel Pump as well. The mechanic says they suspect from ECU as a last option which I'm not that sure although had some similar issue like this happened because of engine air blower going out like 10 years ago with similar symptoms so who knows
. May any of you have any other idea that we should check?
3) There seems to be a red colored oil cumulating in the coolant, which I suspect is the transmission oil getting into the coolant. When the transmission was rebuilt, the transmission oil cooler was replaced with a new one as well but since those guys did manage the broke the engine as well (overheated because they couldn't fill the coolant properly to the car), who knows whether they somehow broke the brand new oil cooler as well
. My question in here would be whether there is any other part that may cause transmission oil to get into coolant other than the "transmission oil cooler"? I see there is a part called "basic plate" which holds the oil cooler but didn't find any information whether it can be a cause for this.
Sorry for the inconvenience and thanks for your time!
Regards,
Özden
My oil temp and coolant temp gauges started shutting off and throwing codes. P3081, P0195 and a Check Engine. Sometimes, one or both of the gauges will come back "online" and all or some of the codes go away. When I plug in my Durametric (Enthusiast Version) and run the values scan with the engine running and up to temp, both oil and coolant temps show they are normal and reading fine. This leads me to believe that it is not a sensor issue but a connectivity issue between the OBC and the gauges or an issue with the gauges/cluster itself.
** If I clear the faults and restart, one or both of the gauges will come online for a while, then randomly shut down and throw a code, never at the same time though.
**. Oil and Engine Sensors show 2.8v 2.9v respectively with engine off and 1.11v and 1.074v while running.
I would really like this not to be a Cluster replacement fix! $6200 from Porsche just to get a new cluster from the Motherland!!!
That being said I would greatly appreciate any helpful/constructive advice on how best to proceed in troubleshooting / Diagnosing / and Resolving this issue
P.S. This is my first venture into a Forum for help, I apologize upfront for the lack of any and all Forum / Help skills on my part. Also, if anyone knows how to convert Iphone pics to the correct format to upload, I have several pics I could share if it would be of any assistance.
Cheers
Second Update
I disconnected the battery terminal for 10 min, ran car for 10-15min and 2-3 miles. No codes and both oil and engine temp gauges worked just fine. Several hours later drove again but this time oil temp sensor fault code appeared almost immediately, which seems odd as the engine temp was not to even up to temp. The Oil temp gauge never moved over the course of my 10mile trip. Two hours later when I started the car I once again got the oil sensor fault on the dash and then a few moments later the Engine temp fault appeared and engine temp needle stayed at zero. Several minutes into my drive home, the engine temp needle popped up to 175 and the corresponding falult cleared. Oil temp never moved of of zero.
