Master cylinder plug size
Le Mans Master
Joined: Aug 2017
Posts: 8,336
Likes: 2,810
From: Cool Northern Michigan
STOP! Do Not insert a bolt in that port. You could damage the flare inside and the brake line may never seal.
Go to your favorite car parts store and buy a ready-made brake line with the correct brass fitting on the end. You can find them as short as a foot or less. Then bend the line to pinch it off. You will use that piece of line over & over to test the MC.
I do not recall the dia or tpi of the fittings but the rear is different than the front.
Go to your favorite car parts store and buy a ready-made brake line with the correct brass fitting on the end. You can find them as short as a foot or less. Then bend the line to pinch it off. You will use that piece of line over & over to test the MC.
I do not recall the dia or tpi of the fittings but the rear is different than the front.
Last edited by HeadsU.P.; Jul 23, 2019 at 08:01 PM.
Le Mans Master
Joined: Aug 2006
Posts: 7,425
Likes: 1,558
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Advance auto has Master cylinder bleed kits in the help section.
It has the (plastic) plugs you need.
It has the (plastic) plugs you need.
