Bleeder screw angle, seat angle

[ksagis]

Looking to see what folk's opinions are on this topic - I've read here (I think) about suggestions to tidy up bleeder seats by using a bleeder screw with polishing compound.

But, as far as I can tell, bleeder screws are generally 90 degrees, and the seat itself is 120 degrees. Opinions on what the angles are?

 

[73azbronco]

Generally the bleed nut is soft enough to cut a seat every time you close it. If its that rusted, you need a new brake cylinder. I would not try polishing, there are about 4000 things needing more attention.

 

[ksagis]

Generally the bleed nut is soft enough to cut a seat every time you close it. If its that rusted, you need a new brake cylinder. I would not try polishing, there are about 4000 things needing more attention.

Are you saying the caliper conical seat “cuts a seat” the bleeder screw or the bleeder screw “cuts a seat” in the caliper seat?

i.e. if I pull out the bleeder screw, is the bleeder screw “bedding” into the seat such that I’d see marking on the bleeder screw but not the seat? If that’s the case, I’d guess replacing a bleeder screw might fix a weepy brake bleeder.

 

[73azbronco]

Probably

 

[gnpenning]

Dykem can be used to see the seat. If you don't have any use a marker then seat.

 

[73azbronco]

It has been 40 years since i heard the word dykem

 

[gnpenning]

It has been 40 years since i heard the word dykem

Still gets used regularly in some circles. The pens are handy. Not as big as mess if you drop

 

[ksagis]

Lots of good advice, but does anybody know the typical numbers for the angles of bleeder screw and seat?