fullymatted.
Back to search
Rennlist

Is it a good idea to replace expansion tank proactively?

Add to repair workspace
Open repair workspace
Original source
16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHIs it a good idea to replace expansion tank proactively?

Leading reported evidence

Replace pulleys at

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 also replaced the pulleys at that time.

Is it a good idea to replace expansion tank proactively?
Frequently discussed work

Check /

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

if you are changing the water pump and need to replace the coolant anyhow I would say yes - it's cheap now and you wont have another period without the car when it fails in 2 months or 2 years when ever that happens....might have them check/replace your idler pulleys while they are in there too - cheap and quick but saves a trip

Is it a good idea to replace expansion tank proactively?
Read full discussion summary

Leading evidence: 'Replace pulleys at' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check /' (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.

Read captured replies

1 matching discussions · 16 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace under warranty

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

In my car, which I bought in 2000, the tank was replaced under warranty after about 2years.

Is it a good idea to replace expansion tank proactively?

Check /

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

if you are changing the water pump and need to replace the coolant anyhow I would say yes - it's cheap now and you wont have another period without the car when it fails in 2 months or 2 years when ever that happens....might have them check/replace your idler pulleys while they are in there too - cheap and quick but saves a trip

Is it a good idea to replace expansion tank proactively?

Replace ...and many of them

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

dont forget the flywheel can be bad, it needs to be checked and replaced as needed and is about $1k part...if its good your bill will be LESS - shops (good ones) usually quote the job as if it needed to be replaced...AND many of them change the clutch slave line while in there.....

Is it a good idea to replace expansion tank proactively?

Replace clutch slave line while in there

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

dont forget the flywheel can be bad, it needs to be checked and replaced as needed and is about $1k part...if its good your bill will be LESS - shops (good ones) usually quote the job as if it needed to be replaced...AND many of them change the clutch slave line while in there.....

Is it a good idea to replace expansion tank proactively?
Frequently discussed actions (8)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check /

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

if you are changing the water pump and need to replace the coolant anyhow I would say yes - it's cheap now and you wont have another period without the car when it fails in 2 months or 2 years when ever that happens....might have them check/replace your idler pulleys while they are in there too - cheap and quick but saves a trip

Is it a good idea to replace expansion tank proactively?

Replace ...and many of them

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

dont forget the flywheel can be bad, it needs to be checked and replaced as needed and is about $1k part...if its good your bill will be LESS - shops (good ones) usually quote the job as if it needed to be replaced...AND many of them change the clutch slave line while in there.....

Is it a good idea to replace expansion tank proactively?

Replace clutch slave line while in there

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

dont forget the flywheel can be bad, it needs to be checked and replaced as needed and is about $1k part...if its good your bill will be LESS - shops (good ones) usually quote the job as if it needed to be replaced...AND many of them change the clutch slave line while in there.....

Is it a good idea to replace expansion tank proactively?

Replace expansion tank proactively

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

Is it a good idea to replace expansion tank proactively?

Is it a good idea to replace expansion tank proactively?

Replace pulleys at

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

I also replaced the pulleys at that time.

Is it a good idea to replace expansion tank proactively?

Replace tank

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

My tech noted that for my next service (on my 996) he would recommend changing the tank.

Is it a good idea to replace expansion tank proactively?

Replace under warranty

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

In my car, which I bought in 2000, the tank was replaced under warranty after about 2years.

Is it a good idea to replace expansion tank proactively?

Replace water pump and need

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

if you are changing the water pump and need to replace the coolant anyhow I would say yes - it's cheap now and you wont have another period without the car when it fails in 2 months or 2 years when ever that happens....might have them check/replace your idler pulleys while they are in there too - cheap and quick but saves a trip

Is it a good idea to replace expansion tank proactively?
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.

16 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: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Is it a good idea to replace expansion tank proactively? I am doing the 60k service along with clutch, AOS and water pump in few weeks should I just have my indy do the expansion tank while in there? Car is 2004 with 58k miles right now.

POST 2Original post

8 year old tank. My tech noted that for my next service (on my 996) he would recommend changing the tank.

POST 3Original post

In this case I would say why fix something that is not broken, and not a part that would lead to catastrophic damage if it does break (like the IMS bearing). In my car, which I bought in 2000, the tank was replaced under warranty after about 2years. Now 10+ years later it is still fine.

POST 4Original post

if you are changing the water pump and need to replace the coolant anyhow I would say yes - it's cheap now and you wont have another period without the car when it fails in 2 months or 2 years when ever that happens....might have them check/replace your idler pulleys while they are in there too - cheap and quick but saves a trip now the bigger Q is: replacing clutch - I assume you are adding the $600 part that we all hate to talk about while you are in there!!! dont forget the flywheel can be bad, it needs to be checked and replaced as needed and is about $1k part...if its good your bill will be LESS - shops (good ones) usually quote the job as if it needed to be replaced...AND many of them change the clutch slave line while in there..... welcome to the party !

POST 5 / ORIGINAL POSTEROriginal post

I did the IMS / RMS at 34k miles when I bough the car. I am having indy do the 60K (belts, plugs, filters, etc...) and while in there do water pump, AOS, clutch (which is slipping), and now I guess expansion tank as well. I am doing the x74 suspension as well. Yes, it's going to be a great party in my pants, rear pocket especially Honestly, though in 2.5 years the car has been great and I know this is going to be expensive service but as a DD i just want to do it right and keep on driving

POST 6Original post

Is the expansion tank discolored at all? That seems to be the biggest indicator of wear/impending failure. Mine was replaced about 3 or 4 years ago, and is still bright white. I have seen many that are off white or yellowing, which seems to be an indication that the plastic is weakening. So, if mine were white, I wouldn't do anything, if it were discoloring, I would. DS

POST 7Original post

I chose to replace the expansion tank proactively at the exact same mileage and service as you are asking about. Rather safe than sorry later on. I also made the other updates as you are doing. I also replaced the pulleys at that time.

POST 8Original post

Quotes source post: 10041589

well golly !!! nice nice nice!!!

POST 9Original post

Quotes source post: 10041589

so you will pay for NEW coolant once, might as well do the tank also (along with new t-stat)

POST 10Original post

If he's doing the AOS anyway, since it is a MKII, he'll likely pull out the tank anyway so I'd sure have him do it. And a 160F T-stat. The coolant costs more than than the T-stat.

POST 11 / ORIGINAL POSTEROriginal post

Anyone have a pn# for that 160 degree T-stat? My car runs just a bit above 180 no matter how I run it and how hot it is so cooling system seems to be up to snuff. I was flirting with adding a 3rd radiator but it is not a straight install in a 40th AE plus it's another $600.00+ I don't feel like spending.

POST 12Original post

I thought the 40th had the middle radiator? At least the coolant tank is much cheaper for ours than the earlier 996's.

POST 13Original post

Quotes source post: 10043654

I'm considering the t-stat as well and I found a few available from Pelican here. LN engnieering no longer carries it. The Wahler one is $70 t-stat including the housing so it's plug-and-play: http://www.pelicanparts.com/catalog/..._pg1.htm#item1

POST 14 / ORIGINAL POSTEROriginal post

No 3rd radiator in a 40th AE. I just had this discussion with Porsche dealer and in the past. Funny how they still argued when I am on phone looking at the car and they are looking a computer, LOL Seems that the X51 engine option adds a 3rd radiator but since the 40th AE has Turbo front end and radiators I guess Porsche tested and did not need it so left it out. Also, since kind of a hybrid that is why the regular 3rd radiator kit nor a Turbo 3rd radiator kit does not fit 100% in a 40th AE.

POST 15Original post

Quotes source post: 10041375

I would recommend you also do the LN IMS Bearing while you are doing your clutch.

POST 16 / ORIGINAL POSTEROriginal post

LN Bearing installed at 34k miles pre-purchase by Porsche dealer in Denver

This is a source reference. Confirm exact model applicability in the original material.