Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: vauxfan2k on 14 October 2010, 21:33:49

Title: Best way to change brake master cylinder
Post by: vauxfan2k on 14 October 2010, 21:33:49

With the engine in situ (v6) is it possible to change the master cylinder (big round black bit)

I have a nice shiney clean one to put on and a dirty one with rust spots to take off.

Can I take the reservoir section (correct name escapes me) off with the 2 bolts eliminating the need to refil and bleed the braking system?

thanks in advance

 :y

Title: Re: Best way to change brake master cylinder
Post by: Andy B on 14 October 2010, 21:37:10

Quote

With the engine in situ (v6) is it possible to change the master cylinder (big round black bit)

I have a nice shiney clean one to put on and a dirty one with rust spots to take off.

This is the servo.

Quote

Can I take the reservoir section (correct name escapes me) off with the 2 bolts eliminating the need to refil and bleed the braking system?

thanks in advance

 :y

and it's this bit that's the master cylinder.

I'd leave them both alone if it's only to swap a slightly grubby servo for a nice shiney 'new' one  :y :y

Title: Re: Best way to change brake master cylinder
Post by: vauxfan2k on 14 October 2010, 21:38:50

but it looks like a big "white head" in my nice spotless engine bay  :'( 

Title: Re: Best way to change brake master cylinder
Post by: Welung666 on 14 October 2010, 22:45:54

So flat the rust off and use a rattle can of black gloss to touch it back in.

Title: Re: Best way to change brake master cylinder
Post by: 2woody on 15 October 2010, 09:10:08

it is possible but not easy.

you must separate the master cylinder from the servo and remove that first, which of course means that you'll need to bleed the system afterwards.

I'd also agree that it's not worth it just for cosmetic appearance.

Title: Re: Best way to change brake master cylinder
Post by: Kevin Wood on 15 October 2010, 09:52:58

Agreed. Not worth the trouble, especially considering the MC is upstream of the ABS block. If you get air in that you might get away with it, or you might end up with something you can't bleed without a Tech 2 to exercise the ABS modulators.

Kevin

Title: Re: Best way to change brake master cylinder
Post by: Andy B on 15 October 2010, 10:05:59

Many  many years ago I removed the servo & master cylinder from my MkIII Cortina & split them .... no idea now why  :-/ Fitted it back on the car and bled it all with no apparent problem. Got in the car a few days later and as I was slowing down to leave the Navy shore establishment I had that sinking feeling as the pedal sank all the way to the floor  :o, pumping it made sod all difference  :'( Fortunately I was going slow enough to stop the car on the handbrake.  :y I replaced the whole lot from A N Other car  :y

Title: Re: Best way to change brake master cylinder
Post by: 2woody on 15 October 2010, 11:47:29

Quote

Agreed. Not worth the trouble, especially considering the MC is upstream of the ABS block. If you get air in that you might get away with it, or you might end up with something you can't bleed without a Tech 2 to exercise the ABS modulators.

Kevin

mind you - if the brake fluid hasn't been changed for a year or two - it's going to be a good idea