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The mkiv Supra Owners Club

How do i Bleed my Brakes


Guest SupraGrumDiddy

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Guest SupraGrumDiddy

How do i Bleed my Brakes, i have air in the brakes somewhere and the pedal is really spongey, can ne one tell me how to do this on a mkiv uk spec??

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Buy a brake bleed kit from Gunson. Makes it simple.

More tedious but not too complicated takes two people: 1) Have a friend inside the car pump the brakes 3-4 times and then hold down 2) with a hose over the bleeder screw to a catch can, back off the bleeder screw until fluid pours out into the can (important friend keeps foot pressure on the pedal until you close the bleeder) 3) close the bleeder screw 4) repeat until you see clear fluid coming through into the catch can. Start at the wheel furthest from the reservoir (left rear) and work your way to the closest. Make sure the reservoir does not go empty or you will have to start from scratch. It's easy but easier with Gunson kit.

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Don't forget to use plenty of WD40 on the discs before you bleed them....

 

Will help the braking power long term, also helps the pads last longer....

 

 

 

 

Side affect of them not working, but is that really that important.... *grin*

 

Seriously tho... two man job, and not very difficult.. one to press the pedal... the other to loosen the nipple...

 

Gav

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Dude....

 

I was kidding about the WD40.... mind you I can still remember when a mate of mine told my neighbour at the time, that he could solve his squeaky brakes with WD40...

 

Aparently he was well chuffed that they stopped squeaking, but was a little worried about how hard he had to push the pedal before any reaction....

 

Can't believe he actually did it tho...

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Jeez - you guys shouldn't be anywhere near brakes!

Get a garage to do it - seriously...

If they're spongy it may not be as simple as a bleed - could be master clinder leaking? Has the fluid been changed within service interval? Is there a leak anywhere?

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Brakes are just about the most important thing you have on your car so if you have doubts get someone else to do it.

 

Having said all that it is not difficult, you just have to be very methodical and over cautious. Keep your master cylinder topped up at all times and push about 1/3 of a full system through each rear and about 1/4 through each front and you will totally flush the system. Go for a good race spec fluid like Motul. I do a total flush about every 18 months to keep everything in tip top shape.

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