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Registered
Join Date: May 2010
Posts: 13
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77 oil tank bung replacement
I have a 77 911 oil tank with stripped threads on the bung for the oil drain plug.
would anyone know the size of this bung and where one would be able to buy it. I will mail the tank to pacific oil coolers but they need me to supply the bung to be welded in. Thanks for any help. |
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02-01-2024, 05:22 AM
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PCA Member since 1988
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First, there are oversize drain plugs avail at many retailers. They have cutting edges on the lead-in threads, so you install the new plug carefully and turn it in until it cuts new threads.
Next, you can install a Helicoil or Timesert. The sealing surface is at the flat part of the bung where the crush washer sits, so those inserts will not cause leaks (make sure they are installed flush, or slightly below the flat surface). Welding in a new bung is a last resort.
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1973.5 911T with RoW 1980 SC CIS stroked to 3.2, 10:1 Mahle Sport p/c's, TBC exhaust ports, M1 cams, SSI's. RSR bushings & adj spring plates, Koni Sports, 21/26mm T-bars, stock swaybars, 16x7 Fuchs w Michelin Pilot Sport A/S 3+, 205/55-16 at all 4 corners. Cars are for driving. If you want art, get something you can hang on the wall! |
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02-01-2024, 01:16 PM
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Join Date: May 2010
Posts: 13
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thank you for that. I will start searching for that oversize nut and see if that works forst.
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02-02-2024, 04:37 AM
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mine was also stripped. I ordered a M22 1.5 soot chaser from amazon and cleaned up the threads and it worked well
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02-02-2024, 05:24 AM
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Join Date: Feb 2009
Posts: 1,006
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? Does your drain plug have a 19mm or 15mm hex. 19 can have short threads, 15mm always have long threads.
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02-02-2024, 08:24 AM
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