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post #11 of 15 (permalink) Old 18th April 2015 Thread Starter
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Re: rx4 seized calliper?

hi madnoel,

good to know i only need 1 screw for the brake disc.

as for bleeding the brakes i used a tub while my dad pressed the brake so when i say it was spraying everywhere i meant as in it was spouting from the bleed nipple into the tub. wether or not there is air in the system im not sure. the brake pedal was pressed several times while i topped up the reservoir.

im not sure i understand the toasting of the nipple as it tightens/slackens off easily.

have i done something wrong in regards to bleeding the brakes? should i take off both front wheels and bleed them again?

what should i do next?


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post #12 of 15 (permalink) Old 18th April 2015
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Re: rx4 seized calliper?

If you're going to bleed brakes without the tube fitted to the bleed nipple, you need to wrap some cloth round it and only open it very slightly.
Let the fluid trickle out.
Close the nipple once the pedal is down, then let pedal up.
Then put slight pressure on the pedal and open the nipple again. The pedal should slowly drop.
If you see air bubbles come out with the fuid, you had air trapped somewhere.
You don't need to pump the pedal each time.

Do the up/down bleed process at least 10 times to get fresh fuid through the pipes and caliper.

Clean spilled fluid with brake spray.

You can leave the reservoir lid unscrewed and keep topping the fluid up.

Your brakes will be a little bit spongy until the pads bed into the disc.
I'd advise changing the pads on the other side so they will match.
Different manufacturers use different material that wears at different rates and grips..guess what.?...differently.

The window fault could be switch, motor/regulator, wiring or the UCH (body control unit) behind the interior fusebox.
If it had one touch facility, the switch tells the uch to raise or lower the window.

Would remove door card and test for a live and earth to the motor when swich pressed to go down.
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post #13 of 15 (permalink) Old 19th April 2015
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Re: rx4 seized calliper?

Looks like you have the job almost cracked

A good tip to crack open a stubborn bleed nipple is to use a ring spanner and hold some force on the nipple as if to loosen it, with the force applied repeatedly tap the end of the bleed nipple with a hammer, this normally does the trick.

99% chance it's the sliding mechanism on the caliper that is seized not the piston, this can normally be freed off by a bit of cleaning up and a bit of grease. Sometimes the pads become that tight in their location that they don't want to move, once again a good clean up normally cures any problems.

It's good practice when bleeding only push the pedal half way down...it never travels to the floor under normal use so that part of the master cylinder could have corrosion on the walls which can damage the seals and cause fluid let by which would be evident by a sinking pedal after the bleeding.

(The above mainly applies to older cars with cast iron master cylinders, modern master cylinders have alloy internals to prevent corrosion, but none the less a good practice)


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post #14 of 15 (permalink) Old 19th April 2015
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Re: rx4 seized calliper?

Check out the link below - it gives a good demonstration of bleeding brakes.

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post #15 of 15 (permalink) Old 2nd May 2015 Thread Starter
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Hi I have removed some of the dash probably overkill but can someone tell me how to remove the uch? I am trying to sort this window problem by swapping the uch from my other rx4 as. Hear the window relay clicking. I tried a piece of wire to test motor but didn't get any spark so I guess I'm doing something wrong. Think it was the brown wire I tried that's on the window motor the other one is white but haven't tried that yet.
Is there a window relay separate from the such or is it part of it? I keep getting the clicking noise but when I removed the 5amp fuse to check it, it seemed fine buy when I remove it I obviously don't get anything.
Please advise thanks

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calliper , rx4 , seized

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