“Piggyback” Sump Plugs

[Citroënbender]

This sort of thing; particular example randomly selected from Fleabay store “October2024”. Are they at all durable?

Or, if limited to “screw in repairs” by time and budget, is a wire coil insert type fix, far better?

Usual fix at the workshop is tap to 2mm up, so M14 goes to M16 with a regular plug. It doesn’t always go perfectly, so I’m canvassing other methods.

[foxtrot3]

Hi. Looks nice but the next mechanic you take it to will dive under the car with a 19mm/21mm/25mm (pick the size) and undo it like a normal plug and not even see that he should have used an allen key to drain the oil. Cheers MD

[Citroënbender]

Good point, they should have designed a tamperproof cone that tapped firmly over the external hex.

[XR Martin]

Grind off the corners after you install it?

[1970XW351]

Don't do that, because then the unsupervised apprentice will lock some visegrips on it to get it out... Or drag over a welder and try to weld a bit of flat on to remove.... (At least, that's what I would do if unsupervised and confronted with a vexacious device with no corners.)

Cheers, Tony