11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHFailure Indicator & How long to warm up?
Leading reported evidence
Replace those lately
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.
Leading evidence: 'Replace those lately' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace those lately' (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 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
You are correct but my coolant level is ok, and the fact that my oil pressure took longer to drop make me believe that the engine was running cool.
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.
Rennlist: 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: 20261026T133652Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
A few days ago while driving particularly slowly to work in the 996 C4S Tip for the first and only time to date I got the "Failure Indicator" message for the temperature gauge. Flashing red light on gauge and needle fully left. When it recovered the gauge was reading 60C after which it slowly rose to 80C. I understand that on Tip cars this can be caused by a problem with the activation of the disc valve on the oil/water transmission cooler e.g.:
non sealing valve
leaking vacuum pipe
faulty solenoid valve
Based on this a couple of questions:
What is the source of the vacuum which operates the disc valve?
I then got to thinking that since I've had the car I've thought that it warms up a little slower than perhaps it should. Its winter here now so morning starting temperature is around 20C (68f). In the CTT coolant is at 80C (180f) in 3-4 minutes and oil temp at 90C (194f) about 7 mins after starting. doing the same journey in the C4S it has taken at least 10-12 mins for the coolant to reach 80C (180f) and the oil pressure probably another 5 minutes to normalise; is this normal for a 996 3.6L engine at this starting temperature?
Any feedback appreciate, thanks.
I believe the temp gauge will also flash red if the coolant tank level is low, so that might be an easy resolution. If I'm mistaken, I apologize. This was the case in my Boxster, so I imagine it's the same for the 996.
You are correct but my coolant level is ok, and the fact that my oil pressure took longer to drop make me believe that the engine was running cool. I've read that if the disc valve is faulty it will substantially slow the rate of 'warm up', but this only applies to Tips.
There is about 20litres of coolant in 996. It will take more time to heat up.
The coolant temp sensor might be going bad.
Enginebay temp sensor allso triggers the red flashing light, but it will not cause the temp reading to change.
I was thinking about this and was wondering - have you considered the thermostat, or water pump? Have you replaced those lately? The thermostat could be worn out and opening too soon (weak spring). The impeller blades on the water pump could be worn out and not moving enough coolant. Just my 2 cents.
Just a follow up I timed mine yesterday morning. Garage temp was 65F and outside 55F. It took exactly 5 minutes to get to 180F on the temp gauge and another 3 minutes for the oil pressure to drop to the normal operating range.
I have thought about a lot of things but the issue that I quoted above put forward by RFM on Renntech made a lot of sense to me from a logic point of view.
The first step though is establish whether I actually have a problem rather than a glitch. Owning 4 Porsches has convinced my that glitches are a way of life.
