6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHAOS Diagnosis 1999 C4
Reported or suspected cause
cracked head etc
Suggestion or failed attempt
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
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 suspect a cause
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.
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
Replace the AOS and hose, change oil, drain and refill coolant, pull all spark plugs and check them (replace), perform a pressure check and leak down test on all cylinders.
Leading evidence: 'cracked head etc' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'cracked head etc' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace ), perform a pressure' (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.
Suggestion
Replace the AOS and hose, change oil, drain and refill coolant, pull all spark plugs and check them (replace), perform a pressure check and leak down test on all cylinders.
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 · Original poster
My solution is to just replace the AOS and breather hose and that then all of my oil and water mix problems will be solved !
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
Replace the AOS and hose, change oil, drain and refill coolant, pull all spark plugs and check them (replace), perform a pressure check and leak down test on all cylinders.
Replace oil, drain and refill coolant, pull all spark plugs
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
Replace the AOS and hose, change oil, drain and refill coolant, pull all spark plugs and check them (replace), perform a pressure check and leak down test on all cylinders.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Replace ), perform a pressure
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
Replace the AOS and hose, change oil, drain and refill coolant, pull all spark plugs and check them (replace), perform a pressure check and leak down test on all cylinders.
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
Replace the AOS and hose, change oil, drain and refill coolant, pull all spark plugs and check them (replace), perform a pressure check and leak down test on all cylinders.
Replace oil, drain and refill coolant, pull all spark plugs
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
Replace the AOS and hose, change oil, drain and refill coolant, pull all spark plugs and check them (replace), perform a pressure check and leak down test on all cylinders.
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
Replace the AOS and hose, change oil, drain and refill coolant, pull all spark plugs and check them (replace), perform a pressure check and leak down test on all cylinders.
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.
6 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: 20261026T122219Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
OK here goes
My engine has a bad milkshake syndrome
But it still runs and idles very smooth
When I add water to the water bottle I see a milkshake mix
coming from what appears to be a cracked breather hose near to the right side cylinder head
My current theory is that a bad AOS valve is leaking fluid (water?) into the breather
hose and thus caused it to burst and leak
My solution is to just replace the AOS and breather hose and that then all of my oil and water mix problems will be solved !
Is my theory even a possibility or am I missing something here ?
I know that it is probably a cracked head etc. but what if it isn't...
How else could the breather hose crack ?
Looks like it has a one or two inch split in it about 4 inches before it attaches to the head
Any sage impute appreciated thanks ...
At the very least, stop running the motor in it's current condition (regardless of how well it's running) - if the coolant is in places it shouldn't be (as opposed to oil being were it shouldn't be (which it seems like is what you're hoping for) it'll do irreparable damage to your motor fairly quickly. Is there "milkshake" on the dipstick when you pull it? If not you may be in luck!!! Good Luck
$10-$12,000 gamble for a new engine under those conditions. Don't run it and figure out what is wrong. Oil in coolant...bad. Coolant in oil...worse. Replace the AOS and hose, change oil, drain and refill coolant, pull all spark plugs and check them (replace), perform a pressure check and leak down test on all cylinders. That will give you a clue if the cylinder head is cracked.
This is a source reference. Confirm exact model applicability in the original material.
