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Early signs of d chunk

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

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YOUR RESEARCHEarly signs of d chunk

Leading reported evidence

Test engine health as a fwiw)

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Suggestion
(see the thread on blow-by test Engine Health as a FWIW).
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Early signs of d chunk

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Leading evidence: 'Test engine health as a fwiw)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Test engine health as a fwiw)' (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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Test engine health as a fwiw)

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
(see the thread on blow-by test Engine Health as a FWIW).
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Early signs of d chunk

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

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POST 1 / ORIGINAL POSTEROriginal post

Any indications this is going to happen?? Just want to know.

POST 2Original post

Lots of white "smoke" i.e. coolant out of the exhaust. I didn't get to a full D chunk, but I did have a cracked cylinder from the top down. Keep driving and the crack will work its way back up, hence the D shape.

POST 3Original post

If you were to measure the cylinders and find them going "out-of-round" then you would know the cracking/D-chunk is on the way. You could can see this also if detailed "blow-by" data were performed on the engine since new. An increase in blow-by would indicate the cylinders going out-of-round or rings/cylinders wearing. (see the thread on blow-by test Engine Health as a FWIW). Other than that, as Yaz said, after the cracking starts, the symptoms will show up... Most people just wait for the symptoms to show up and don't worry about what mite happen..

POST 4 / ORIGINAL POSTEROriginal post

Appreciate the info. Wish you all a great day.

POST 5Original post

Luis, get a copy of The Essential Companion by Streather. Provides valuable insight on the 996.

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