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Author Green goop in brake fluid
Kyle T
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Registered: 11th Sep 04
Location: Selby, North Yorkshire
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15th Mar 14 at 16:25   View Garage View User's Profile U2U Member Reply With Quote

Any ideas?






Lotus Elise 111R

Impreza WRX STi
Ben G
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Location: Essex
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15th Mar 14 at 16:33   View User's Profile U2U Member Reply With Quote

Have you mixed 2 different types of fluid together? E.g dot 4 and dot 5.1?
Kyle T
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15th Mar 14 at 16:35   View Garage View User's Profile U2U Member Reply With Quote

I haven't. Just used what it says on the cap.

Though come to think of it, I had a garage swap my rear calipers a week after I did the fronts (due to seized bolts) so wondering what they put in to bleed the rears...


Lotus Elise 111R

Impreza WRX STi
Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
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15th Mar 14 at 16:40   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by Kyle T
I haven't. Just used what it says on the cap.

Though come to think of it, I had a garage swap my rear calipers a week after I did the fronts (due to seized bolts) so wondering what they put in to bleed the rears...


power steering fluid by the looks of it!
alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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15th Mar 14 at 17:37   View User's Profile U2U Member Reply With Quote

Power steering fluid I've used is red.

Serious question, what does it smell like?
Kyle T
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Location: Selby, North Yorkshire
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15th Mar 14 at 17:38   View Garage View User's Profile U2U Member Reply With Quote

I tried to smell it, but couldn't really make anything out.

Stopped at tasting though




Lotus Elise 111R

Impreza WRX STi
FlaFFy_91
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Registered: 30th Sep 08
Location: Formby, Merseyside
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15th Mar 14 at 17:57   View Garage View User's Profile U2U Member Reply With Quote

Power steering fluid is usually red. Don't think mixing the two brake fluids together will create that either?

It looks proper lumpy and horrible.
Is there actual brake fluid in there aswell as this green goop or is it full on goop?
Mattb
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15th Mar 14 at 18:06   View User's Profile U2U Member Reply With Quote

Colour depends on the type.. Dextron 2 (red) is what many manufacturers use for PAS and it's also auto trans fluid. VAG crap is green and mineral oil..

Either way, no idea what that gunk is but I know that I would be bleeding the entire system and replacing the fluid, hopefully it's just down to a dodgy mix of stuff

[Edited on 15-03-2014 by Mattb]
_Allan_
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15th Mar 14 at 18:14   View User's Profile U2U Member Reply With Quote

Looks like Swarfega
Ben J
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Registered: 31st Jan 05
Location: Cheshire
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15th Mar 14 at 19:16   View User's Profile U2U Member Reply With Quote

How's your brake pedal???
Kyle T
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Registered: 11th Sep 04
Location: Selby, North Yorkshire
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15th Mar 14 at 19:54   View Garage View User's Profile U2U Member Reply With Quote

It's not too bad, was going to flush and replace next weekend before track day anyway.


Lotus Elise 111R

Impreza WRX STi
VrsTurbo
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Registered: 8th Jun 10
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15th Mar 14 at 20:28   View Garage View User's Profile U2U Member Reply With Quote

i'd be taking the reservoir off and sticking it through the dishwasher!

[Edited on 15-03-2014 by VrsTurbo]
sc0ott
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15th Mar 14 at 23:18   View User's Profile U2U Member Reply With Quote

quote:
Originally posted by VrsTurbo
i'd be taking the reservoir off and sticking it through the dishwasher!

[Edited on 15-03-2014 by VrsTurbo]


Assuming he has a wife/GF.
Toby
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Registered: 29th Nov 05
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16th Mar 14 at 11:16   View Garage View User's Profile U2U Member Reply With Quote

I sure I have read of something similar in the past and it was due to the fluid reacting with the copper on the pipes. I'm pretty sure it stems from using dot 5 which has a silicate in it to stop it absorbing water and the tea tion with the copper causing the slime/gunge. this could ring true as a daily using dot 5 can cause issues due to the non water absorbtion. I could be way off though.
Kyle T
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Registered: 11th Sep 04
Location: Selby, North Yorkshire
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16th Mar 14 at 11:22   View Garage View User's Profile U2U Member Reply With Quote

The copper reaction came up on scoobynet, but some people seem sure that there's no copper in the system to react with.

Will give it all a good flush through next weekend, then keep an eye on it.


Lotus Elise 111R

Impreza WRX STi
Jamie-C
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Registered: 3rd Jun 08
Location: Ballycastle
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16th Mar 14 at 12:05   View User's Profile U2U Member Reply With Quote

my car has green power steering fluid
SVM 286
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19th Mar 14 at 17:17   View User's Profile U2U Member Reply With Quote

That's bizarre Kyle. I've not encountered anything like that in a brake reservoir before.

I'd be getting that out of there tout suite and have the system pressure bled to (hopefully) clear it all out.

I wouldn't be using the car before it gets done either, as it's better to assume that whatever it is, will do damage, the longer it's left.

Plus I wouldn't expect the braking system to be effective (especially when subject to heat), with any kind of contamination to, or reaction of, the brake fluid therein.
3CorsaMeal
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Registered: 11th Apr 02
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19th Mar 14 at 18:47   View User's Profile U2U Member Reply With Quote

It's mixed brake fluids. Could be pretty bad tbh. I feel sorry for you.
Ben G
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Location: Essex
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19th Mar 14 at 18:58   View User's Profile U2U Member Reply With Quote

That seems the most likely culrit, mixed brake fluids. Might have been some residue left of the old stuff.
Toby
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19th Mar 14 at 19:36   View Garage View User's Profile U2U Member Reply With Quote

That's not a result of mixing DOT 3/4/5.1 Brake fluids.
Kyle T
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Registered: 11th Sep 04
Location: Selby, North Yorkshire
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21st Mar 14 at 18:15   View Garage View User's Profile U2U Member Reply With Quote

Dropped car off to get baffled sump fitted today, showed them pictures above and they had never seen anything like it. They said they've seen mixed grade of fluid before, and that's not what happens.

Needless to say they're flushing and refilling for me while they've got it... saves me a job.


Lotus Elise 111R

Impreza WRX STi
stan_the_man
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Registered: 14th Feb 07
Location: Perth, Western Australia
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23rd Mar 14 at 12:00   View User's Profile U2U Member Reply With Quote

I see a few cars at work with the same stuff. I just assumed it was possibly emulsified from condensation or some kind of water ingress. Wipes/flushes out fine and i've yet to see any detrimental affect to the brakes from it.
alan-g-w
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Registered: 9th Nov 07
Location: Glasgow
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23rd Mar 14 at 12:17   View User's Profile U2U Member Reply With Quote

There are loads of instances of it if you Google 'green slime in brake fluid'
deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
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23rd Mar 14 at 15:44   View User's Profile U2U Member Reply With Quote

Headgasket.

3CorsaMeal
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Registered: 11th Apr 02
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24th Mar 14 at 10:30   View User's Profile U2U Member Reply With Quote


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