@purple: 80 not high pressure. Teflon in the threads can hold 1000s of psi.

Interesting thought you could use enough teflon to move the seal to the threads vs the seat. That would be permanent.

You have to guess the amount. Trial and error perhaps. Report back findings. The gasket is really hard to find for sale.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)