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Repair oil pickup tube mount broken threads?

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YOUR RESEARCHRepair oil pickup tube mount broken threads?

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Repair i am installing a deep sump kit

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Suggestion · Original poster

In the process of my LN 4.0 refresh / cracked head repair, I am installing a deep sump kit.

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Repair oil pickup tube mount broken threads?
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Leading evidence: 'Repair i am installing a deep sump kit' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Repair i am installing a deep sump kit' (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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Repair i am installing a deep sump kit

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Suggestion · Original poster

In the process of my LN 4.0 refresh / cracked head repair, I am installing a deep sump kit.

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Repair oil pickup tube mount broken threads?
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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.

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POST 1 / ORIGINAL POSTEROriginal post

Hello again folks, In the process of my LN 4.0 refresh / cracked head repair, I am installing a deep sump kit. When I removed the existing pickup tube bolts, about half the thread came with them on one bolt It almost looks like there are already some kind of insert / helicoil in there already, that has given up. Curious if anyone has thoughts on options to repair this - I am not sure how thick the walls of the pickup mounts are, if I want to drill out for a timesert. Also, I'm puzzled by what's already in there - is this factory? This is obviously not a point where failure can be permitted to occur, as it's the main oil pickup. It's also kind of a pain to work on, since I haven't split the case, and drilling is going to include a lot of contamination / impossible to put on a press. I can manage around this if needed, but thoughts welcome, in case anyone else has encountered this. I've never seen entire chunks of thread come out of a casting before... Truth be told, there are still some threads left and a bolt will catch them (and bottom out without spinning the remaining threads), but I definitely don't feel comfortable leaving it as-is! Sigh. My buddy suggested self tapping screws and we had a good chuckle Both sides appear to have some kind of insert in them. Here's a longer distance view of both: And here's a "close-up" of the now-mangled side:

POST 2Original post

That's classic aluminum thread gauling, that is what aluminum is famous for... That close-up looks factory to me, no insert , just a factory countsunk thread... No problem drilling and putting a thread insert in there, there is plenty of meat around there just watch the depth and don't go any deeper...

POST 3 / ORIGINAL POSTEROriginal post

You rock, sir. Much appreciated!

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