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You have to fix that right away!
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Posted by PJ Cats (more from PJ Cats) on Sat, 11 Aug 2001 15:12:19 Share Post by Email
In Reply to: The brake fluid did come out of the caliper..., Rob 85 Turbo, Sat, 11 Aug 2001 14:48:00
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The piston has rubber rings in/around it to stop from leaking. Once these rings get beyond a certain point they lose their fit and the brake fluid leaks out. If you push the piston back in gently (!!) you might get away with it without the rings being damaged. Then the leak will stop. You have to do that right away to prevent from losing too much brake fluid. Btw brake fluid is very aggressive and makes metal rust fast and is very environmentally/skin unfriendly.
The brake fluid that leaked out can be refilled in the reservoir. Take a look at the reservoir. It's in the engine bay, driver's side, by the coolant reservoir, right on top in front of you. It's plastic, not too big and half transparant, with a round lid in the same color and some wires attached to it. The reservoir has a min/max indicator. It should never get below min.!!!If you have new pads on all four brakes, the reservoir should be completely full. (some logic there, think about it)
The bad thing is that with the fluid leaking out, air can get in to your brake cylinder. This will cause the brake to lose function, as air is compressible where a fluid isn't. Like I said, this makes it necessary to bleed the brakes when fluid has leaked out.
Another type of bad luck that sometimes occurs in these situations is the rubber gets damaged inside the cylinder. In that case you have to revise the caliper. It's not that hard, you can buy revision sets that contain new rubbers and things you need. It's a bit of a pain to take the calipers apart, but it's also good practice.
But please will you first stop that leaking. Some way or other gently move the piston out of the house (cylinder) a little. The surface of the piston equal to the housing is okay. Then it should no longer leak. Good luck!

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