Joined: Jul 2015
Posts: 7,236
Likes: 3,142
From: NW Oregon
Bikes: 1982 Trek 930R Custom, '91 Diamondback Ascent w/ XT, XTR updates, Fuji Team Pro CF road flyer, Specialized Sirrus Gravel Convert, '09 Comencal Meta 5.5 XC, '02 Marin MBX500, '84 Gitane Criterium bike
spray the port lightly with Pam cooking spray..
squeeze some silicone gasket goop in there, and stick a tab of rough edged plastic into the goop ..
let it cure for two days.
pop out the new plug, and clean away the cooking spray.