5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 Intermix.....
Leading reported evidence
Replace 1000 miles prior)
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
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Leading evidence: 'Replace 1000 miles prior)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace 1000 miles prior)' (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 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.
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
Did they test the oil cooler before they replaced it?
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.
5 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.
3 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
The smoke problem was resolved as well as the coolant in the oil.
2000 C4 Cab. Problem started with a massive smoke plume out of both exhausts. Checking things out revealed intermix both ways, although very little coolant in oil when it was drained and allowed to separate. (Oil had just been changed 1000 miles prior).
Local Porsche shop suggested oil cooler replacement. That was replaced as well as the AOS (Air Oil Separator). The smoke problem was resolved as well as the coolant in the oil. Oil is still getting into the coolant somehow.
Car has always run fine and never overheated or showed a CEL. Everything I read says its a cracked head?
Seems odd that some of the issues were resolved but am still getting a one way mix. Is there another entry point that oil can be forced into the coolant but not vice versa? Seems that a cracked head would intermix both ways?
Do a search here, there are lots of threads on this including my intermix and fix. Did they test the oil cooler before they replaced it? They should have as this is an easy test and it is seldom the oil cooler that is the problem. Possibly an AOS, but not too likely.
Remove the plugs and tubes on #1 and #6 and look for cracks, you might see one.
THE mode of failure for 2000 model engines are cracked heads. We have 11 different 200 and 01 996s here now, all with cracked heads. We saved all but one of them, it was driven to death.
We are now seeing many, many more intermix related failures than anything else.
Jake,
How were the water pump impeller blades on these cars? Were any loosing material and being the sole contributor to this problem?
BTW, immensely enjoyed your spring time meet & greet session in Toronto.
Not all of them, 6 of them had bad water pumps or had just had the water pump changed in the year previous, following a pump failure. It sometimes takes the debris a while to find a capillary to block and create a localized hotspot that propagates into a crack that bridges the coolant and lubrication passages.
The 2000 model cars can fail without having a bad water pump. We have some very good clues as to why this is because the cracks always come at two different places within the cylinder head and have the same dynamics behind them. A 2000 model year engine does NOT have to overheat to crack a head!
Here is a link to the photo album for this week's patient
https://www.facebook.com/media/set/?...4914693&type=3
Nice meeting you in Toronto as well. I really should put more of these meet and greet sessions together as I travel North America to instruct my Porsche M96 Engine Mechanical Schools :-)
This is a source reference. Confirm exact model applicability in the original material.
