Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: star_whites on 04 December 2011, 13:22:52
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Ok, I've just got round to removing the brake master cylinder off my 2001 2.6 and I have an urgent question::
The master cylinder I have removed has the numbers 2017 (symbol) 1 written underneath, however the one I bought off albs had 2017 (symbol) 2 written on it. Does this mean it's the wrong one or is it just a newer model????
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No one got any ideas as was hoping to get this fitted this afternoon?? ???
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the size is cast into the body of the master cylinder on the top, below the reservoir
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They both say Lucas and the number 25 stirrer on them.
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They both say Lucas and the number 25 stirrer on them.
???
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Damn phone. They both have Lucas 25 stamped on to the top of them!......does this mean they are the same??
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Damn phone. They both have Lucas 25 stamped on to the top of them!......does this mean they are the same??
Yep, some master cylinders on the Omega had a 25/20 split bore feeding front/rear. If the one from Albs has identical markings to yours should all be OK
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Just seen this - thanks Rob. you ride to the rescue yet again. I owe you - again. :y
Star Whites - hope its all OK, if no, let me know. :y
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Well it's back on the car, now just to see what happens when bleeding!
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Oh my god I have fluid at the caliper 8) :D :y
Only problem now is the new flexi hose I bought is leaking!....glad I bought a spare! ::)
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Well hopefully the last update on my brakes, I've replaced the master cylinder and completely bleed the entire system and I have brakes :D
There not fantastic due to new pads all round and rusty discs due to how long she's been stood but I think after bedding in the new pads and cleaning the discs up they will be ok, believe me they are way better than they were!
Just headlight to dismantle and check if bulbs are seated properly ( due to high beam on drivers side) and she will be off for another mot!! :) :y
Thanks for all your help, especially Albs, top man :y
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Glad to hear its (hopefully) all sorted now. :y
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Next decision is whether to stick with dot 4 or flush it again with the expensive race fluid I've been given. The guy says it's ideal for my mig especially due to the size of her. He recons it will improve braking distance!
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Going from vague memory rather than knowledge - racing fluid ,fully synthetic ? not compatible with other types of fluid ?
If this is the case you would need to get all of the old fluid out of the system before putting it in.
Personally,I think Dot4 is more than up to the job.It would take some pretty extreme driving on the road to boil it imo.
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Good news Star - well done. :y
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Well in that case it's staying with dot 4 but think I will bleed them again after 100 miles or so just to make sure there's no air in the system!
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Going from vague memory rather than knowledge - racing fluid ,fully synthetic ? not compatible with other types of fluid ?
If this is the case you would need to get all of the old fluid out of the system before putting it in.
Personally,I think Dot4 is more than up to the job.It would take some pretty extreme driving on the road to boil it imo.
Yup to what Albs just said;
DOT4 is fine for a road car, you'd have to be going some to boil it (though TB probably could..) in which case use DOT5.1 like Motul RBF600 (or whatever the new version of that is)
DO NOT use DOT5, however, as it's incompatible with DOT4 & 5.1 and is silicone based, so you'd have to flush the lines with a cleaning agent and then probably replace all the seals early.
I can't see how switching from DOT4 to 5.1 could reduce braking distances either (as long as you can engage the ABS/lock the wheels, braking distance is largely a function of the coefficient of friction provided by your tyres - it's only when you need that performance again and again, corner after corner, for a 2hr race that you need bigger brakes/fancy fluids etc).
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My memory worked. YAY !! ;D ;D
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As you get older, a working memory becomes more and more surprising, eh Albs? ;)
IIRC the main advantage of DOT5 is that it isn't hygroscopic like 4 & 5.1, but that's outweighed by the disadvantages on a road car. 5.1 has a higher minimum boiling point than 5 anyway, although something like RBF600/660 is DOT4 but exceeds the specs of 5 & 5.1.. very good brake fluid, but again, I can't see the need for it in an Omega that sees general road use.
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Going from vague memory rather than knowledge - racing fluid ,fully synthetic ? not compatible with other types of fluid ?
If this is the case you would need to get all of the old fluid out of the system before putting it in.
Personally,I think Dot4 is more than up to the job.It would take some pretty extreme driving on the road to boil it imo.
http://www.gomog.com/allmorgan/brakefluid.html