5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHMy Durametric arrived today
Leading reported evidence
Clean thoroughly
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
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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
Possibly the coolant wasn't cleaned thoroughly after the repair.
Leading evidence: 'Clean thoroughly' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'water pump failure' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check before pulling the engine' (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 suspect a cause
1
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Suspected cause · Original poster
I'm wondering if the root cause was a water pump failure.
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
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Suggestion · Original poster
I'm trying to put together a story that makes sense and things to check before pulling the engine.
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
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Suggestion · Original poster
Murph- it's a bit of a story, but I promised my wife I wouldn't touch the car until Feb 3., but the first thing I plan to do is check the oil and filter.
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
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Suggestion
OP, have you drained the oil and inspected the filter yet?
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Suggestion · Original poster
Murph- it's a bit of a story, but I promised my wife I wouldn't touch the car until Feb 3., but the first thing I plan to do is check the oil and filter.
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.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T165820Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
A couple of months ago I bought a '99 roller, engine has a bad knock like a bad rod bearing or something similar. Also shows milkshake in the coolant, but nothing in the engine oil. PO told me the car had a bad head gasket and was replaced and ran fine for a while after that until the knock started. Not sure I believe that. Possibly the coolant wasn't cleaned thoroughly after the repair.
Engine will run, but I never start it so I don't damage it any further. I thought before I decide on a course of action, I'd get a Durametric and see if I can gain any intelligence on what may be going on inside. So I hooked it up and see a cyl 1 misfire, no other codes, no range 2 ignitions, and only 792 range 1 ignitions. This tells me the car has led an easy life, but what concerns me is that the last range 1 was only about 1 hour ago. I'm trying to put together a story that makes sense and things to check before pulling the engine.
My last range-1 ignition was probably about 5 operating minutes ago - but my car visits redline frequently. I'm betting the car hasn't been driven much or at all since the initial misdiagnosis of a blown head gasket.
The combination of "blown head gasket" and recent range 1 ignitions suggest that somebody was beating on the car, it overheated, the "head gasket blew."
I'm guessing the knock "started" as soon as the engine was cobbled back together well enough to start after the overheating-related failure.
Thats not a bad guess at all. One other consideration is whether or not an overheat caused any oil pressure issues at that high temp.
OP, have you drained the oil and inspected the filter yet? If not, maybe do so and think about collecting some of the oil for analysis as well.
5chn3ll - your theory makes sense. I'm wondering if the root cause was a water pump failure.
Murph- it's a bit of a story, but I promised my wife I wouldn't touch the car until Feb 3., but the first thing I plan to do is check the oil and filter. I don't think durametric can give me any temperature history.
The durametric is cool, but I'd also be inclined to do a physical inspection of the engine to see if you can get any other clues. Drain the oil, drop the oil pan, inspect for foreign materials in the sump. Get a borescope (they're dirt cheap now), pull the plugs and do a visual inspection of the cylinders. Drain and flush the cooling system - see if you get any interesting clues in what drains out: bits of water pump, etc. I suspect there are other reasons you'd have oil in the coolant - maybe the oil cooler on top of the engine failed... Would a vacuum or pressure test of the cooling system give you any clues? You could keep gong depending upon what you found - pull the valve covers, etc. The more you inspect, the more you are likely to learn.
My '00 had an engine that didn't run, and had indications of intermix. Taking the sump off told me a whole lot about why - big D shaped chunk of aluminum, sludgy glitter all over the sump plate, etc.
Don't forget to budget for all new hoses (there are a ton of them). They oil in the intemix breaks them down, and with all the sitting your's is doing, odds are you will end up needing to replace a lot (all) of them.
This is a source reference. Confirm exact model applicability in the original material.
