12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCoolant came pouring out...help/suggestions?
Reported or suspected cause
tank...ended up being the water pump
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
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Discussions that report identifying a cause
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Reported cause
Mine leaked and I was sure it was the tank...ended up being the water pump.
Leading evidence: 'tank...ended up being the water pump' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'tank...ended up being the water pump' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Replace coolant tank and cap' (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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1
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Performed · outcome unconfirmed · Original poster
I replaced both my coolant tank and cap on my '99 996 recently with a Porsche tech out of town (other home) due to small leaks.
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Suggestion
Did you replace the spring clamps with the screw type clamps (there is a TSB)?
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Suggestion · Original poster
Engine belt is okay I believe...car is running/driving fine.
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Discussions that contain suggestions
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Suggestion
Why use $50 Porsche coolant when you can get it for $10!!
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.
12 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T152433Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I replaced both my coolant tank and cap on my '99 996 recently with a Porsche tech out of town (other home) due to small leaks. The other day however, I was sitting idle in Neutral on a very small driveway incline and the coolant randomly came flushing out the back on its own...white smoke came up from heat contact, but almost all of the coolant came out. I'm not sure if it boiled over, but it's hard to find any leaks. Any ideas what I should do? I'm thinking about just filling it back with coolant and see how it runs for the next couple of days.
Thanks!
I had the same thing happen in my previous p-car. Faulty cap, which let the coolant boil over at a very low temp. Dealer replaced and balanced my coolant...good to go. Might be a start.
Cap shouldn't be faulty though unless it was loose?? Brand new cap...
Engine belt is okay I believe...car is running/driving fine. I may need to just make a trip to the dealer to get more coolant/proper mix. How much should this cost btw...with service. I'm in LA...scared of BH Porsche service prices.
Are you sure your coolant tank is not cracked?
Refill it - let is sit overnight and see if you have more leaks.
A cracked tank is a lot more common that a leaking bleeder valve.
Mine leaked and I was sure it was the tank...ended up being the water pump. I agree w/1999Porsche911. Why use $50 Porsche coolant when you can get it for $10!!
I just replaced the tank though...the old tank had a very very small leak/crack on the bottom...reminder, this new incident wasn't a leak...the coolant came pouring out randomly...like just the entire full tank of new coolant came flushing out the back. Is it possible the thermostat is broken and it boiled over?
could be the water pump...?
Redridge, it previously was leaking on the left side muffler with the cracked tank, but this last time it all just came pouring out at once...not from a particular side.
50/50 Peak lifetime...I'll look for this and let it sit overnight maybe?
Anyone know any Porsche techs in Los Angeles? I'm scared to get raped by Bevery Hills Porsche.
Did you replace the spring clamps with the screw type clamps (there is a TSB)? I replaced mine due to leaking when under pressure for the connections to the tank.
