The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => A7 & A10 Engine => Topic started by: Roger (Doomtrainbarx) on 16.07. 2026 18:58

Title: A7 ss Sludge trap plugs
Post by: Roger (Doomtrainbarx) on 16.07. 2026 18:58

I was checking the "sludge trap" chamber on this A7 crank today.
When I fitted the new bungs, I noticed they screw in a couple of threads below the webbing face.
Should they be flush and peined over, or screwed right in till they stop ?

Title: Re: A7 ss Sludge trap plugs
Post by: berger on 16.07. 2026 20:18

rog that subject has just been covered yesterday in depth .  *beer*

Title: Re: A7 ss Sludge trap plugs
Post by: muskrat on 16.07. 2026 21:39

G'day Roger.
Both ends flush with two good center pops to keep'em there. Check the length of the timing side plug to make certain it will not block the oil hole. SJ plugs differ to LJ plugs.
Cheers