Aaron65 Posted September 12, 2021 Share Posted September 12, 2021 Does anyone have a common part number for a drain plug gasket for a 263? I ran around town trying to find something to fit last year, and the gasket I found is too thick and is dripping on the floor. I have enough drips as is... I'd order from one of the Buick suppliers, but I hate to order a two dollar part and nothing else. Thanks if you can give me a hand! Aaron Link to comment Share on other sites More sharing options...
EmTee Posted September 12, 2021 Share Posted September 12, 2021 I don't own a straight-8 (yet) so I don't know if this will work for you, but sometimes an old spark plug gasket does the trick... 1 Link to comment Share on other sites More sharing options...
JohnD1956 Posted September 12, 2021 Share Posted September 12, 2021 You can probably find something in a well stocked hardware store 1 Link to comment Share on other sites More sharing options...
Ben Bruce aka First Born Posted September 13, 2021 Share Posted September 13, 2021 5 hours ago, EmTee said: I don't own a straight-8 (yet) so I don't know if this will work for you, but sometimes an old spark plug gasket does the trick... Too small. Ben Link to comment Share on other sites More sharing options...
EmTee Posted September 13, 2021 Share Posted September 13, 2021 OK, I'll bet it's like the one in my Pontiac. As JohnD said, they're generally available. I'd look in the HELP section of your local auto parts store. Link to comment Share on other sites More sharing options...
JFranklin Posted September 13, 2021 Share Posted September 13, 2021 NAPA auto parts store. 1 Link to comment Share on other sites More sharing options...
Aaron65 Posted September 13, 2021 Author Share Posted September 13, 2021 In case anybody runs into this in the future...the size of the plug is M18-1.5. I stopped at Auto Value on my way home from work, and they had a copper washer that would work. I also stopped to see what O'Reilly's had; they had a plug and matching gasket in their Dorman section, so I bought that, too. I planned to use the washer with my original plug, but the flange has a little shoulder that interfered with the new gasket, so I popped in the new plug, and it fits fine. 1 Link to comment Share on other sites More sharing options...
Matt Harwood Posted September 13, 2021 Share Posted September 13, 2021 Curious that it's metric. Good find. Link to comment Share on other sites More sharing options...
Aaron65 Posted September 13, 2021 Author Share Posted September 13, 2021 53 minutes ago, Matt Harwood said: Curious that it's metric. Good find. Agreed! The service manual calls for a 28mm plug, but that's obviously a typo. The only other metric measurement I saw in the engine section was for the spark plugs - 14mm. Link to comment Share on other sites More sharing options...
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