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996 C2 Cooling System - How do I flush it??

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4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH996 C2 Cooling System - How do I flush it??

Leading reported evidence

Install pump tonight - took about 3 hours

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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 · Original poster
Fitted new pump tonight - took about 3 hours to remove, and same again to put back together, and saved myself about £260 - enjoyed it too!
Original post Read captured discussion
996 C2 Cooling System - How do I flush it??

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Leading evidence: 'Install pump tonight - took about 3 hours' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Install pump tonight - took about 3 hours' (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 matching discussions · 4 captured posts examined · 0 partial discussions

Compare 3 other evidence results

Replace coolant

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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
Not too sure about getting the water out, but make sure you replace the coolant with Porsche coolant.The Porsche coolant is good for the engine.
Original post Read captured discussion
996 C2 Cooling System - How do I flush it??

Replace water pump, the impeller of

Suggestion or failed attempt

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
In the middle of replacing my water pump, the impeller of which has completely disintegrated, and I'm worried about floating bits of plastic blocking up the cooling system.
Original post Read captured discussion
996 C2 Cooling System - How do I flush it??

Use hose pushed inside the header tank

Suggestion or failed attempt

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
Managed to flush out all the plastic shards and crap using a hose pushed inside the header tank, then inside the inlets, outlets and hoses where the water pump mounts.
Original post Read captured discussion
996 C2 Cooling System - How do I flush it??

Frequently discussed actions (4)

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

Install pump tonight - took about 3 hours

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 · Original poster
Fitted new pump tonight - took about 3 hours to remove, and same again to put back together, and saved myself about £260 - enjoyed it too!
Original post Read captured discussion
996 C2 Cooling System - How do I flush it??

Replace coolant

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
Not too sure about getting the water out, but make sure you replace the coolant with Porsche coolant.The Porsche coolant is good for the engine.
Original post Read captured discussion
996 C2 Cooling System - How do I flush it??

Replace water pump, the impeller of

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
In the middle of replacing my water pump, the impeller of which has completely disintegrated, and I'm worried about floating bits of plastic blocking up the cooling system.
Original post Read captured discussion
996 C2 Cooling System - How do I flush it??

Use hose pushed inside the header 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 · Original poster
Managed to flush out all the plastic shards and crap using a hose pushed inside the header tank, then inside the inlets, outlets and hoses where the water pump mounts.
Original post Read captured discussion
996 C2 Cooling System - How do I flush it??

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.

4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

911uk: 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: 20261026T174436Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

In the middle of replacing my water pump, the impeller of which has completely disintegrated, and I'm worried about floating bits of plastic blocking up the cooling system. Is there a procedure for flushing it out? Cheers

POST 2Original post

Not too sure about getting the water out, but make sure you replace the coolant with Porsche coolant.The Porsche coolant is good for the engine. (I was told by PARR)

POST 3 / ORIGINAL POSTEROriginal post

As far as I can make out, Porsche coolant is just OAT coolant, or Organic Acid Technology (silicate free), and Halfords does OAT coolant too. OPC price for coolant is about £8 + VAT per litre, and the coolant capacity in a 996 is about 20 litres +/- a litre or two = £160 + VAT. Halfords do an OAT silicate free concentrate coolant at £22 for 5 litres (makes 10 litres when mixed 50:50), so would be £44 to top up my beetle. Can't stand paying over the odds when I don't have to!!

POST 4 / ORIGINAL POSTEROriginal post

Picked up 10 litres of OAT coolant for £31 from my local motor factors - Porsche approved too Managed to flush out all the plastic shards and crap using a hose pushed inside the header tank, then inside the inlets, outlets and hoses where the water pump mounts. Seemed to wash out enough to make up the missing parts of my old pump! Fitted new pump tonight - took about 3 hours to remove, and same again to put back together, and saved myself about £260 - enjoyed it too! :mechanic:

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