bleeding brakes, soda stream brake fluid

[emery1990]

What number has yours got on it, mine says 20 but my old one says 22. 

Yer looked up and it is 22mm I need

But just looked and on the box it says width length height etc and says 22.5mm but on the body says 20. Can I measure it somehow.

[Neo Badness]

What number has yours got on it, mine says 20 but my old one says 22. 

Yer looked up and it is 22mm I need

But just looked and on the box it says width length height etc and says 22.5mm but on the body says 20. Can I measure it somehow.

Yes the bit that goes into the servo, measure the diameter, should be 22mm. Both of the ones I've got said 20 on the outside but were 22mm when measured with engineers calipers, think that might be the German sense of humor? Or perhaps they had a load of 8v master cylinder castings and put 16v guts in them?

[emery1990]

lol God knows, I took it back and paid bit more for a 22mm one, made of aluminium so more weight loss there!

Ain't got fluid coming out the rear passenger now lol Knowing my luck that'll be a new bias valve or something!

[clipperjay]

MAybe its not the MAster cylinder ?? have you pressure tested it ??

+1 if the impossible is left, then that is what is left, unless the pinion is not connected properly at the pedal end to servo?

[Neo Badness]

MAybe its not the MAster cylinder ?? have you pressure tested it ??

+1 if the impossible is left, then that is what is left, unless the pinion is not connected properly at the pedal end to servo?

How does pinion connect to the master cylinder. I was under the impression that the Master cylinder, after undoing the bolts, just slides into the servo?

[clipperjay]

It does but the pedal box attaches through a pinion via the the two two rods one from the pedal to the servo, but if I remember rightly you have had a solid pedal already that had gone soft so restrospectively it should be ok? Just check that pinion is still connected to the rod on the servo.
But if there is a small rip in the servo it could in theory loose pressure in the diaphram on the servo side? I've got two of my larger M/C capped it off with bolts instead of bleed nipples all I did was lock tighted them so they have complete seal and no problems with a 16v Servo combo.
   

[Neo Badness]

Hmmmn, I dunno. I will check the pinion on the rod on the servo. More head in the footwell antics.

I'm working on the principle that if the servo not working/ tear in diaphragm would cause heavy/ stiff pedal due to lack of assistance and the car to run like a bag of poo due it drawing extra air through the leak to the manifold. I think either I have a weepy leak, not a proper leak. A mullered load sensing valve or simply there is somehow still air it the system.

Going to have a proper go at it this long weekend. Get this thing sorted once and for all.

[emery1990]

Have you just screwed in your bleed nipples without any sealant? Have you got your old M/C, I took the blanking bolts from there, and made a washer with ptfe tap and they seem fine. Maybe it could weeping out of the there? Or have you checked this?

[Neo Badness]

Have you just screwed in your bleed nipples without any sealant? Have you got your old M/C, I took the blanking bolts from there, and made a washer with ptfe tap and they seem fine. Maybe it could weeping out of the there? Or have you checked this?

None of the unions I took apart had ptfe tape on them so i didn't use it when reassembling. Dind't think that would be suitable in this application. Haven't had time to work on the car this week. PITA.

[JimR]

Bleed nipples *shouldn't* need any sealant, they seal against the cone on the end of the nipple.