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Discussion summary
YOUR RESEARCHSummer is here, my car is 18 years old, are my hoses and my expansion tank at risk?
Reported or suspected cause
black coolant bleeder valve
Reported cause
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1
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Suspected cause
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Reported cause
My biggest problem was the black coolant bleeder valve on top.
Summer is here, my car is 18 years old, are my hoses and my expansion tank at risk?
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Leading evidence: 'black coolant bleeder valve' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'black coolant bleeder valve' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check where you can' (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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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
I just picked up the car from mechanic after new expansion tank installed during AOS install (engine out).
Summer is here, my car is 18 years old, are my hoses and my expansion tank at risk?
Replace coolant hose
Performed · outcome unconfirmed
No successful repair reported for this finding.
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Performed · outcome unconfirmed
I've not yet replaced a coolant hose, but did replace my coolant tank several years ago along with an updated cap.
Summer is here, my car is 18 years old, are my hoses and my expansion tank at risk?
Replace expansion tank
Performed · outcome unconfirmed
No successful repair reported for this finding.
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Unsuccessful attempts
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Performed · outcome unconfirmed
I just replaced the expansion tank on mine and it's a job, but with patience and all the how to do's it can be done.
Summer is here, my car is 18 years old, are my hoses and my expansion tank at risk?
Replace expansion tank a month
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Performed · outcome unconfirmed · Original poster
Just found out the last owner replaced the expansion tank a month before he sold it to me.
Summer is here, my car is 18 years old, are my hoses and my expansion tank at risk?
Replace coolant tank is a dyi
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Discussions that contain suggestions
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Suggestion
I bought my 996 in 2006 and have learned through the Rennlist forum and Pelican about doing some of the work myself.Not only can you save $ but for me it is a way to get to know your Porsche.Not sure what year your 911 is, but replacing the coolant tank is a DYI, but you will skin some knuckles in the process.
Summer is here, my car is 18 years old, are my hoses and my expansion tank at risk?
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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.
19 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261026T103553Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
The hoses are pretty robust. I would just do a visual check where you can. My car is also 18 years old and I bought a new expansion tank and plan to proactively replace the old one. The plastic tank has been through a lot of heat cycles over the years and replacement is prudent. I just haven't gotten around to it yet. Get the new version of the cap as well - with part number ending in "004".
that�s exactly what I�m thinking. I have read that the hoses can last longer than I had thought, however the tank is definitely yellowed and weathered. Looks like the labor will be a bit pricey though, and it may be a $600+. repair. Oh well. Gotta be ready for the summer heat in So Cal.
I bought my 996 in 2006 and have learned through the Rennlist forum and Pelican about doing some of the work myself.Not only can you save $ but for me it is a way to get to know your Porsche.Not sure what year your 911 is, but replacing the coolant tank is a DYI, but you will skin some knuckles in the process.
Thanks Barn. Mine is a 2000, and it has been well cared for. I�m wondering why the mechanic didn�t tell the PO to get this done. He didn�t everything else under the sun.
I�m just not suited for DIY stuff. Don�t have the space in my garage, the tools, the patience, or even the time right now in my life. What I have read is that the engine needs to be dropped slightly to do the tank swap, then there�s the flushing out and replacing of coolant, and it�s really all just beyond the pale for me.
I'm no veteran with the 996 but I am with plastic and rubber in older cars. There's a great thread right now and this has been in the discussion. All your plastic hoses/breather tube etc. should be replaced or at least smoke/pressure tested at the very least. It's not a matter of if but when will these fail. They always fail at the worst time!
Put down the phone, go drive your car. It�ll be fine. If people spent as much time driving their cars as they did worrying needlessly about them, this crowd would be much happier.
I�m off for a drive...
I just replaced the expansion tank on mine and it's a job, but with patience and all the how to do's it can be done. My biggest problem was the black coolant bleeder valve on top. I purchased 2 tanks from two different venders and could not draw a vacuum on either because of that. I then purchased a genuine Porsche coolant bleeder valve and put it on one of the tanks and all was good. I was then able to vacuum the coolant system and then draw back almost 6 gallons of coolant without any air pockets. If you do it this way make sure your tank is no more than the max line when you're done for expansion when you drive it.
I replaced my C2 convertible coolant tank 2 years ago as it was leaking. I think that it took me about 2 hours.This video was helpful:
You Tube
Having your indy doing it for you will keep your finger nails clean...
I think they're more at risk in winter in terms of cracking. Keep the running temp as low as possible by cleaning your radiators, monitoring cooling system and ensuring it's doing its job well. My only breakdown in the 996 was in winter after spirited driving: a coolant tank connection broke ($17 part).
I replaced my expansion tank after it broke and leaked all over the garage floor. Total PITA, and I almost gave up, until I removed the fuel rails. Then I was able to FORCE that stupid tank in there! I was seriously hoping there were no sparks, open fuel connections and all.
Just found out the last owner replaced the expansion tank a month before he sold it to me. The hoses are not a concern to the mechanic who worked on the car for the last 15 years, so I think I�m good to go.
Modern hoses are made of EPDM rubber , like silicone rubber, they will last almost forever depending on what they come in contact with. If contacted by oil, clean asap with a degreaser , or brake fluid, clean immediately rinsing with water. They are much more robust than old school natural rubber (with rayon cords) that required replacement every 2 years !!.. Can you imagine replacing all 27 hoses on a 996 every 2 years?? lol
I just picked up the car from mechanic after new expansion tank installed during AOS install (engine out). Got it home and the tank is leaking somewhere! I'm going to get in there and hope to find a hose clamp out of position or something. I noticed it dripping from the top of the tank in the back (towards front of car). Not sure if that was runoff though.
Anyone hear of new tanks leaking? It's a genuine Porsche tank.
You Tube
