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Old 05-07-2002, 07:54 PM   #1
bjteel
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2002 WRB WRX

Default Master Cylinder Cap Off, what do I do

My dealer left the master cylinder cap off of my car which I have been driving for the last week and a half like that (I don't know how I am still alive)

Is this even possible that I have had brake pressure without the cap?

Anyway, do I need to flush the system? Isn't brake fluid hygroscopic (absorbs moisture)? It has been raining almost every other day here. I am afraid that I might have gotten a ton of moisture in the system.

My Dealer Sucks! This was just after fixing the ABS problem. They even left my car unlocked in the back of the lot and someone left a chew cup in the pass. seat.
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Old 05-07-2002, 09:09 PM   #2
romanom
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Default



Don't know if I should laugh or cry!


The cap is a very important piece, it keeps the fluid in, it ensures proper pressure above the fluid and it keeps the fluid clean, and air out.

I would do a flush just in case, I'd me more worried about particles of material like dirt than moisture.

Do a flush, but pull the fluid in the reservior out with a "turkey baster" first. Check you engine bay as fluid will eventually eat through gaskets, rubber hoses and wire insulation.

You can brake without the cap, but eventually you'll slosh out fluid and you'll suck air into the system.

Man I would chew out the dealership for a good half a day! And have do all the work, including cleaning the engine compartment and replacing the master cylinder in case you did get dirt in there!


I mean that would be like buying tires, having them mounted on rims and then mounted on the car with out air in the tires!
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Old 05-07-2002, 09:20 PM   #3
bjteel
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I think they should flush out the brakes, but I am scared to let them have my car again. How dumb could they be?

I don't see fluid anywhere under the hood, but I don't see how it didn't get everywhere.

I had just taken the car for a "spirited" jaunt that surely would have gotten fluid all over. For a split second I thought I cornered so hard that the cap came off. j/k
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Old 05-07-2002, 09:38 PM   #4
romanom
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Brake fluid drys, but the nasty stuff stays behind. Clean the area, you don't need problems in the future. I would call SOA and have them take care of it and tell them you want another dealer to do the work.
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Old 05-07-2002, 09:49 PM   #5
jamz
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Un-be-freakin-leivable.

You will still have brakes, there is no pressure in the reservoir- it's just a reservoir. However, the fluid that is left probably has a bit of water in it now, so you should flush it out. I agree with the poster before- call SOA and have them lay the smackdown on that moron dealership.
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Old 05-07-2002, 10:46 PM   #6
Austin
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Get a good flush, and
Quote:
SOA and have them lay the smackdown on that moron dealership.
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Old 05-07-2002, 11:18 PM   #7
bjteel
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What should I do...

1) Call the dealership, ask them to flush the system, if they agree, don't SOA, and then never return to that dealership

2) Call SOA first thing in the morning and take it to the moronic dealership demanding a flush

3) Call SOA and take it to a different dealership (this will probably take forever and I need my car to get to work to pay for my car)
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Old 05-07-2002, 11:19 PM   #8
bjteel
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I should get a flush AND some free STi stuff!!!

Are there any SOA people in the club?
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Old 05-08-2002, 08:12 AM   #9
romanom
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Quote:
Originally posted by bjteel
What should I do...

1) Call the dealership, ask them to flush the system, if they agree, don't SOA, and then never return to that dealership

2) Call SOA first thing in the morning and take it to the moronic dealership demanding a flush

3) Call SOA and take it to a different dealership (this will probably take forever and I need my car to get to work to pay for my car)
First get the system flushed ASAP, if you have any particles in there they will start to grind away at the master cylinder seals.

The proper way to do this is to remove the master cylinder, dismantle it and clean the components. and flush out the system not through the calipers but at the hose end. And hope that the ABS block is clean. I would take this very seriously.

The reservior does require a certain pressure to operate properly, if you look on the cap you'll see a diaphram and a slot (this is a vent) underneath it.



-Brake fluid is very corrosive
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Old 05-08-2002, 08:50 AM   #10
Lightning Jack
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that's why i hate when other ppl work on my car
they tend to have careless atleast that's what i thought

sux but i don't know nothing about stuff understahood
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Old 05-08-2002, 05:34 PM   #11
brainrally
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You didn't mention the dealership's name. I'd like to know so I know who to avoid. The place where I bought my Subaru is no longer doing Subaru (either selling or servicing). The closest Subie dealers to me are in St. Louis area.
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