BMW 5 Series Brake Fluid Flush & Bleed

BMW 5 Series Brake Fluid Flush & Bleed
Do you have a spongy brake bicycle, less than ideal braking coerce, or feel like you need to pump the pedal to get it firm ? Chances are you need to bleed or flush your brake fluid. Brake fluent is hygroscopic, meaning it absorb moisture from the air and while your brake organization is reasonably tight, urine vaporization still sneaks in over time. The problem is, urine boils at 100°c and when it boils it starts to be compressible. That ’ s a problem as your brake system requires changeless pressure to work. DOT 4, when it ’ south mark new, is by and large rated for around 270°c which is plenty for regular drive ( although track enthusiasts should get high temp fluid rather as I found out the hard means ). besides, if you ’ ve just replaced a part of your brake system, either lines, calipers or overlord cylinder, you ’ ll want to bleed your brakes to remove any air bubbles trapped in the system since they excessively are compressible. thus, let me walk you through how to do it. I ’ ll be doing it on this BMW 5 series, but the process is much identical on every car so you should be able to apply this to your vehicle. On this F10 5 series that ’ second decent and simple. First, pop the bonnet with the latch on the drivers side footwell, then pop the three clips holding the formative cowl on the leave handwriting side by the windshield. You can then lift the formative nibble astir and remove it, then you should see the brake fluid reservoir. Unscrew the ceiling and use some paper towels to make sure the ice-cream soda on the fluid level detector doesn ’ t drip brake fluid all over your paint – DOT fluid is nasty material and removes paint rather well.

If you are flushing the system, which I am here, I like to remove arsenic much fluid as possible from the reservoir before heading to the wheels. You can use a joker baster or a syringe, this one I ’ ve catch is for bleeding mountain bicycle brakes. Draw out arsenic much as you can then you can use a funnel to pour some fresh fluid in. It ’ mho best to fill it justly up as we are going to be drawing a fair bite out through each caliper and we don ’ triiodothyronine want this running dry at any point. following is the dirty bite. generally you want to start at the caliper that is the furthest from the master cylinder or ABS pump, but actually either of the back wheels is fine. Jack up that corner, remove the bolts and take the roulette wheel off, then it ’ s a adept mind to give the area around the shed blood nipple a clean with some bracken clean. Take the dust cap off, fit your wrench then your brake hemophiliac, and loosen the bleed nipple so fluid can flow out. Since this is the rear brake, don ’ metric ton forget to take the handbrake off so the piston can move freely while we are doing the rear wheels. If you ’ ve got two people, tighten the valve and have the person in the driver ’ s seat pump up the bicycle, then while they hold the pedal down loosen the valve. The bicycle should move towards the firewall as fluid is pressed out. Hold the pedal to the floor, tighten the hemophiliac then recur. We did that about 5 times on the farthest bicycle, and 3-4 on the rest.

If you are solo, but have this style of ‘ one man ’ bleeder kit out you can merely loosen the valve, then pump aside at the pedal as fluid gets pushed out, but thanks to a one direction ball valve in the tubing it can ’ deoxythymidine monophosphate go back in. once you are done with a steering wheel, tighten the bleed nipple before you take the tube off. You don ’ deoxythymidine monophosphate want to introduce any air bubbles by accident. then stick the debris detonator on and give the area a flying good time with brake clean or buttery body of water. now the roulette wheel can go binding on, and get torqued to spec. In this case that ’ s around 120 new mexico, done in a star traffic pattern. I ’ ve found that running all the bolts in and getting them vitamin a close as you can by ratchet then lowering the car slenderly to get the concluding torsion is the best way to not strip out your wheel hubs.

The fronts are the same process, equitable with a unlike position for the caliper. Remember to check and top up the brake fluid as you are flushing the lines out, if it runs dry you have to bleed all four wheels all over again. If, like us, you are a little faineant and don ’ triiodothyronine visualize removing the front wheels to do this, if you turn the steering wheel all the way right, you can entree the bequeath hand side caliper ’ s hemophiliac without even jacking the car up. That ’ s what we did at the traverse day at Donington, and while it ’ s a little more unmanageable to find your way around barely by feeling, it can be done and saves you some feat. As a final footstep, check your reservoir and top it up sol the fluid is about halfway up the basket. then you can stick the detector back in, screw the cap down, put the credit card trim piece back along with the three clips, drop the bonnet and that ’ s it, all done .

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Category : Car Brakes