7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHPorsche 1999' cooling system Gremlin
Leading reported evidence
Inspect around the overflow bottle
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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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
I inspected all around the overflow bottle but not so much as a drop was detected with the engine warmed up!
Leading evidence: 'Inspect around the overflow bottle' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect ambient temperature sensor' (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 performed work without a confirmed outcome
1
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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
I ran the car at idle in the driveway for well past warm up.
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
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Suggestion · Original poster
One note: A guy posted that the key merely has to be in the accessory position to test the fan by disconnecting the ambient temperature sensor.
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.
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Suggestion · Original poster
After it cooled it took about a gallon and a half to re-fill the reservoir.
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
My guess is the original cap was the problem as there was an update to get rid of those and replace with the -04 cap.
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.
7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Pelican Parts: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
The bleeding of the cooling system & replacement of the original cooling cap seems to have fixed the problem.
Hello guys.
Kinda at my wits end here. Looked through forum but my issue still eludes me.
I have a 1999' 911 Standard Porsche coupe.
After about 30 minutes of driving the low coolant light comes on. I find it about a quart low.
1. The oil is pristine so the coolant isn't going there.
2. No bubbles in the coolant while watching it with the engine warm and the coolant cap off. So no head gasket suspected. (yet)
3. The car is pristine with 99K miles on it. never kept out overnight.
4. The overflow coolant bottle is not old and yellow looking. In fact it looks bright white, like brand new.
Some history. After driving the car about 200 miles the low coolant light came on. I was on the expressway and it was a pouring thunderstorm so I brought it home. The actual temperature gauge never rose past the '0' in the 180 mark.
As I pulled into the garage steam started pouring out of the back end. The cooling cap had vented a lot of antifreeze over the muffler (quite a scare). After it cooled it took about a gallon and a half to re-fill the reservoir.
Now I drive about 20-30 minutes and the low cooling level light comes on and I am down about a quart.
I ran the car at idle in the driveway for well past warm up. I can detect no leaks of any kind, anywhere. I even put large trays under the car in various spots to see if I was missing anything.
I inspected all around the overflow bottle but not so much as a drop was detected with the engine warmed up!
My neck step is to fork out $100 for a cooling system pressure tester. Just my luck that O'Reily auto doesn't have the correct adapter for Porsche in their loaner kit.
Any suggestions or tests you guys can recommend? Wouldn't the leak be detectable with the car running hot just as well as with a cooling system pressurizer?
The engine purrs flawlessly otherwise.
Thanks in advance for any suggestions.
Doug
well, wherever the coolant is going I can't find the leak. Just ordered a new Coolant Tank cap on the premise that maybe the cap is weak and letting a little steam off when the car is run. If there is a drip somewhere it only happens when the car is driven around and not when idling for 35 minutes in garage.
I hate Gremlins......
That's a good start. The cap you want should have the -04 part number. My guess is the original cap was the problem as there was an update to get rid of those and replace with the -04 cap. Review the coolant flush procedure. As I recall, there is a second cap with a wire (triangle looking thing) on top and it needs to be in the correct position. One position for bleeding, one position for normal running.
Hi Doug when you lost coolant at the first, then added more at home or later,
what can happen ,the system then requires primed or and vented,
you should run from cold with heater on hot side, while warming up
add coolant, this opens up the heater valves, at get rid of any air in
the system, also on your car i think there is a vent or similiar item near top or
inside radiator cap, open this when it is nearly hot, then top up as required
This should fix your problem.---- except for worn belts,hoses,old coolant , etc.
regards
The bleeding of the cooling system & replacement of the original cooling cap seems to have fixed the problem.
I never noticed the engine compartment fan coming on--even driving in stop & go with A/C blasting. I unplugged sensor and fan turned on so I thought the sensor might be bad and replaced it.
One note: A guy posted that the key merely has to be in the accessory position to test the fan by disconnecting the ambient temperature sensor. I found that the test only works if the engine is actually running.
I did use a heat gun to test the old sensor. It took a LOT of heat but the switch eventually opened. (shrugs) New one in anyways.
glad you got it sorted, burping the system is a PITA
My engine compartment fan has only come on 1 time that i know of (it's loud), and it gets up to 110+ here
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