R16HTD
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 posted on 2/5/08 at 01:56 PM |
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Leaking brake master cylinder
I have now had 2 sierra master cylinders and they have both leaked from the push rod end. I cannot source new seal kits does any have the same problem
or know how to fix it?
thanks
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Bluemoon
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| posted on 2/5/08 at 01:59 PM |
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Have you fitted a dust boot? Might be grit getting in and soring the cylinder??
dan
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R16HTD
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| posted on 2/5/08 at 02:01 PM |
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I have not had on the road yet to get dust in. They have both leaked straight after bleeding the brakes.
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02GF74
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| posted on 2/5/08 at 02:07 PM |
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it makes you wonder, doesn;t it?
are they made in China by one armed pandas?
are you doing something wrong or are they both faulty.
obvously they should not leak - definitely not getting fluid dribbing from somewhere else that makes it appear to come from the piston seal end?
is it possible that the push rod is at a bad angle or not central so that it tilts the piston? (don't see how it can but ...)
have you taken them apart to see if there is anything obviousy wrong?
... so it is a bit of a mystery.
[Edited on 2/5/08 by 02GF74]
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l0c0st
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| posted on 2/5/08 at 04:55 PM |
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I've had the same problem. The original one from the donor leaked, then another secondhand one from e-bay leaked. I think the rubber seals just
perish if they aren't used for while.
I've tried to find new seals but can't, although you can still get new m/c so they must be out there somewhere.
Dom
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snapper
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| posted on 2/5/08 at 06:29 PM |
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3 second hand and they all leaked, ended up paying £105 New Old stock on ebay.
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
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rusty nuts
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| posted on 2/5/08 at 06:52 PM |
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Might be worth trying Past Parts in Bury St Edmonds. They helped me when I wanted an old Alfa master cylinder repaired when no one else could . Had
been quoted £600 plus vat by one guy for a new old stock . Past Parts charged a total of £90 to sleeve and reseal with new pistons.
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nasty-bob
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| posted on 2/5/08 at 07:38 PM |
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Were they new or secondhand?
If secondhand, when bleeding you should not depress the pedal futher than it would go in normal use as it damages the seals.
If new, then ignore.
Cheers
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Schrodinger
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| posted on 2/5/08 at 09:05 PM |
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Try LSUK (used to be Lucas) IIRC they made one of the master cylinders in the Sierra.
Look here for your nearest branch
http://www.lsuk.co.uk/branch_locator/england.html
[Edited on 2/5/08 by Schrodinger]
Keith
Aviemore
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robinj66
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| posted on 2/5/08 at 09:29 PM |
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try Eg, here
ht
tp://cgi.ebay.co.uk/FORD-SIERRA-BRAKE-MASTER-CYLINDER-KIT_W0QQitemZ330230838006QQihZ014QQcategoryZ27377QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
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mark chandler
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| posted on 2/5/08 at 11:01 PM |
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I used a master cylinder off a range rover, £60 brand new, now on Ebay for only £45.
You get three outlets, one for the rear, two for the front and a fluid level cap.
 
Rescued attachment 7602_1.jpeg
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Alex B
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| posted on 5/5/08 at 07:14 PM |
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Is that a pattern part?
Alex
Much work still remains to be done before I can announce my total failure to make any progress
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