Old buicks 2 Posted June 4, 2022 Share Posted June 4, 2022 Where can I find 1/4" drive in cup plugs to block the end of the oil passage ways on the rocker arms for my 20 K45? Link to comment Share on other sites More sharing options...
raydurr Posted June 4, 2022 Share Posted June 4, 2022 The smallest core plug offered by Dorman, who is the most common supplier of this type plug, only goes down to 13/32" in size. You might have to drill and tap your shaft, then use a threaded pipe plug instead. Link to comment Share on other sites More sharing options...
Terry Wiegand Posted June 4, 2022 Share Posted June 4, 2022 Tom, Please show us a photo of the end of the rocker arm and the plug that you are asking about. Terry Wiegand South Hutchinson, Kansas AACA Life Member #947918 Link to comment Share on other sites More sharing options...
jbbuick22 Posted June 8, 2022 Share Posted June 8, 2022 dorman #555-122 is a 1/4 cup plug John 22-6-55 sport touring Link to comment Share on other sites More sharing options...
HarryLime Posted June 8, 2022 Share Posted June 8, 2022 https://www.mcmaster.com/welch-plugs/ 1/4 inch steel and stainless Link to comment Share on other sites More sharing options...
Old buicks 2 Posted June 9, 2022 Author Share Posted June 9, 2022 Not a welch plug but an expansion plug Link to comment Share on other sites More sharing options...
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