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Brakes/Hubs Brakes, Hubs, and etc

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post #11 of 17 (permalink) Old 9th May 2009
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Brake fluid is hydroscopic (it absorbs moisture from the atmosphere) which can corrode the pipes and cylinders. In theory under heavy brake use the water content could boil causing steam which would give you the vapour lock they talk about. Most manufactures recommend replacing the brake fluid every two years.
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post #12 of 17 (permalink) Old 16th May 2009 Thread Starter
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No leaks, and have only had the car 1year, was told it had been regulary serviced, and the people I bought if off are genuine, and they live next door, but had a look at the disc, worn to about 2-3 ml, and pads worn also, so have bought new disc and pads, think the level down due to worn pads, causing the pistons to slave more ( protrude out further) , am going to replace both , dics 65 a set, pads 20 a set. experience - - - - - - - heart stopping as fast as the car. lol. Just changed the oil and filter, comma 10- 40 oil.
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post #13 of 17 (permalink) Old 16th May 2009
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Good stuff mate, can't believe how thin you say the discs are

Be sure about the type of piston the caliper has, it may need wound back into the caliper, generally they have notches in them for the tool so it should be obvious. A universal windback tool that attaches to a 1/2" ratchet can usually be bought from your local motor factors, it's only a few quid.

Sorry if you know this already but it can make the job much easier, getting a piston back in without it can be extremely difficult and taxing if it's a windback type.

Let us know how you get on.
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post #14 of 17 (permalink) Old 16th May 2009
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Just a thought - have you checked for signs of leakage at the brake pedal??
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post #15 of 17 (permalink) Old 16th May 2009
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Just as an aside,which engine does your RX4 have in it?.

I'd rather push my Alfa than drive a BMW....
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brakes , spongy

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