9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
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Discussion summary
YOUR RESEARCHIntermix
Leading reported evidence
Use die penatrant crack detector
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed · Original poster
Also have used die penatrant crack detector on both heads in the spark plug hole to valve areas and come up with nothing.
Leading evidence: 'Use die penatrant crack detector' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'most common' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Test on 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.
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Discussions that suspect a cause
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Suspected cause
These are the most common areas for cracks, with #1 probably the most common.
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 put a 70 psi water test on the engine for 2 hours with warm water and come up with zero leaks.
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
Looks like either I'm going to take the set of good heads I have and use with different block and/or resleeve 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.
9 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: 20261026T130754Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Guys need some help here.
I purchased a 99 996 for my son that is what I would call a fixer upper.
I have the engine out and when I drained the oil it had all of the signs of antifreeze in the oil. (Thick gooey crap)
Here is where it gets strange as I have had the engine on the engine stand with the crankcase pan, and both cam covers removed. I put a 70 psi water test on the engine for 2 hours with warm water and come up with zero leaks. Also have used die penatrant crack detector on both heads in the spark plug hole to valve areas and come up with nothing.
Anybody have any other ideas, or should we put it back together install it and moniter?
The issue will not be present until the engine is at temperature. Based on the model year of the engine it has a high risk of a cracked cylinder or a cracked head. The cracked head is repairable. The cracked cylinder is as well, with an update to a set of Nickies cylinders.
Here are some pictures of some cracked heads, including mine. The first place to look is at cylinder #1, inner exhaust valve spring seat. Also cylinder #6, inner exhaust valve seat. These are the most common areas for cracks, with #1 probably the most common. These are both of cracks at #1. The one without the dye is mine. I did not really see it until I had the cams removed. If you are going to remove the cams I have some diagrams for making the cam tools and alot of related info on how to do this.
Well finally found the problem. After heating the engine up to 180 degrees and 60 lbs of water pressure foud a 13mm long crack at the very top of #1 cylinder wall. Looks like either I'm going to take the set of good heads I have and use with different block and/or resleeve it.
Tanks for you help guys.
