Shop Talk

For my DIY BMW E65 750i E66 750li Brake Bleeding Video, I did run into a few problems that were my fault hopefully after you see the video and read this, you will over come potential problems and be worry free.  The number 1 thing that wasted some time was I needed to retro fit my Reservoir cap on my DIY pressure brake bleeder.  It wasn’t air tight which lead to air leaking out of the cap.  I did put Plumbers tape (also known as Teflon Tape) on the reservoir threads to tighten that up and that worked great.  I’ll be honest I enjoyed making my own DIY pressure brake bleeder but I would have invested a few more bucks and bought a better cap.  Or if you have the extra money which isn’t to much more just buy the already made Pressure Brake Bleeder.   I also used JB Weld (the quick set one) to help air tighten just above the cap where the o-ring was.  Then of course I ran into the rookie mistake you see in the video of not putting the straw into the DIY pressure brake bleeder.  After this I quickly was able to accomplish the task and the rest of the project went great.  Again I say it in the video but do yourself a favor and order 2 of the ATE DOT 4  1 liters Cans, because ATE Brake Fluid you can’t just run out to the store and pick it up.  I called Autozone, O’Reilly’s auto parts, Walmart and nobody has it.  If it’s your First time brake bleeding pour both liters in like I did and after you finish with each brake go back and check the pressure in the tank and make sure it’s set to 15 psi, if it dipped a little pump it back to 15 psi, and check brake fluid level in the pressure tank.  You do not want your brake fluid to run dry and suck up air into your system half way through your brake job or you’ll have to start all over and push that air out.  Also a tip for the next time you bleed your brakes switch between the ATE Super Blue and the ATE Typ 200 (the gold color), so that you know when the fresh brake fluid is coming out.

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So let me run the job down for you.

1.  Jack up the car put it on jack stands & Remove all 4 wheels.
2.  Remove the A/C Cabin Micro Filter (located on drivers side)
3.  Detach the reservoir sensor and open the Brake Fluid Reservoir Cap
4.  Take your turkey baster and suck up all the fluid in the reservoir you can so you don’t have to push that fluid through your system.
5.  Pour 1-2 liters (depending if you’ve done this job before or want extra bleeding) of ATE Brake Fluid or Dot 4 of your choice into your pressure brake bleeder, put the pressure cap onto the reservoir, then pump up your system pressure up to 15 PSI.
6.  Go to the rear passenger brake caliper 1st, (because it’s the farthest from the Brake Fluid Reservoir)  remove your nipple cover and brake sensor rubber (watch video for what I mean), spray with WD40 and take your 9mm wrench put it on the nipple nut, then put your hose on the nipple then put the hose into your catch bottle, then open your nut with the 9mm wrench.  Wait till you see the fresh brake fluid color coming through tap on the back of the caliper (carefully not to hit sensor) get all air bubbles out.  Then tighten nipple nut back.  Remove your hose, replace your nipple cover put tire back on.  Head to Pressure tank to look at PSI level and brake fluid level
7.  Next do the same process for Drivers Rear Brake (this will be your 2nd Brake) then Head to Pressure tank to look at PSI level and brake fluid level
8.  3rd Brake will be the Passenger Front Brake, same process and the last 2 brakes but the front brakes are a 11mm wrench.  then Head to Pressure tank to look at PSI level and brake fluid level.
9.  4th Brake will be the Drivers Side Front Brake.  After this brake go to your pressure brake bleeder and release the pressure, then remove cap.
10.  Look at reservoir level if it’s to low add fluid up to the max line, If it’s to high take your turkey baster and remove until it’s back down to the max level.
11.  Put your reservoir cap back on, and re-attach sensor
12.  Put your A/C cabin micro filter back into place, lower your hood, take your car off jack stands.
13.  Take it for a test drive
14.  Have a happy face because you did IT.  Great Job

(If you are still unsure just watch the video, I’m personally a Visual Learner.)


Important Tools For This Job

9mm wrench for the back brake caliper nipple bolts
11mm wrench for the front brake caliper nipple bolts
Catch bottle
Turkey Baster (Don’t tell your wife or parents if you use theirs, and don’t put it back after you use it.  You don’t want everybody getting sick on Thanksgiving.)
Clear hose (for brake fluid to travel from nipple to catch bottle) or really cheap way a clear  drinking straw.
Rubber Mallet (to tap on back of caliper to get air bubbles out, I recommend this step)

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