Hi,

need help to clarify the brake bleeding sequence on a 2018 CX9 AWD, I have read because it has a diagonally split brake hydraulic system the correct sequence is rear passenger->front driver->rear driver->front passenger. Is this correct?? Thanks for help.

 

You go furthest to closest to the master; right rear, left rear, right front, and lastly left front.

 

thank you

 

Hi, just want to see how you made out with bleeding/flushing your brake fluid. Did you follow the sequence of passenger rear, driver rear, passenger front, driver front?
Thanks,
Todd

 

Hi,

yes, followed the above sequence, PR, DR, PF, then DF. No issues afterwards.

Good luck

 

Thanks! Do you happen to remember what size tubing you used for the bleeders? I have both 1/4” and 3/8” so I think I should be good. I also have a one way valve I used to use but I haven’t flushed brakes for 3-4 years so who knows.


QUOTE=jimmyliupa;206439]Hi,

yes, followed the above sequence, PR, DR, PF, then DF. No issues afterwards.

Good luck[/QUOTE]

 

its easy if you follow this principle.
look under hood to locate which side brake fluid reservoir is located. Then start to bleed the FURTHEST wheel first. Ie diagonally opposite at the REAR. Then the next rear wheel. Then the front opposite furthest from reservoir.
This way you never have to remember any sequence. Works for all cars. Don't know about hybrid or EV.

 

Would love to know if the brake pedal felt stiff or softer afterwards. I have a 2014 and the brakes aren’t super responsive/stiff but the vehicle stops if I apply medium pressure about halfway to the floor.

 

Esmazda, it sounds like you need a full brake inspection and likely the fluid flushed and renewed which includes bleeding out the air.

Brake fluid needs to be flushed and renewed periodically. The fluid absorbs moisture from the air. The fluid is designed to dissipate the moisture throughout the fluid so there is never a puddle of water at the low point, your calipers, that will corrode them. When the brakes get very hot from emergency braking this moisture can flash to vapor, your brake pedal goes to the floor, and your car is out of control. Exactly this happened to a friend towing his horse trailer down Mt. Adams. He was able to stop using his parking brake, downshifting, and luckily finding a slight up-incline to stop on. He got out of his truck, looked at everything, found nothing wrong, waited until his breathing was under control, and started carefully down the mountain and back home, this time downshifting on every down grade, and evidently the fluid had time to cool while he was recovering. He mechanic found nothing wrong and told him that it had to be overheated brake fluid. A fluid change and he was ready to go, this time downshifting on every long grade.
https://thebrakereport.com/moisture-...e-fluid-issue/

One time visiting Yosemite I saw a pickup truck pulled to the side with brakes so hot that they were smoking. This guy never heard of downshifting to preserve the brakes. The heat from brakes that hot damages the fluid, the pads or lining on the shoes, the rotors or drums, and the rubber parts of the calipers or brake cylinders.

I used to have a great article on downshifting in the mountains. This recommended determining your safe speed to descend and downshifting to hold just above that speed. Then brake to get below your safe speed, get off the brakes to let them cool, brake again when you're up to your safe max speed, get off them to cool them again, etc., never exceeding the speed you felt safe and never overheating your brakes. A friend used to drive a logging truck in the redwood region of California. They had water drippers on the drums to help cool those brakes on the steep mountain descents. Of course the gyppo outfit he drove for always loaded the trucks either over weight, over length, or over width, usually two out of three.

 

Great advice and I think I’m going to get new fluid, a proper bleed at the calipers, and the ABS as well as suggested. Funny enough, I’ll be driving it through the east coast mountains next month so it would be good to have it serviced beforehand. East coast mountains are nothing like the west but I’d like to be safe than sorry. Thanks for the advice and the stories as well. Sounds a bit unnerving. I’d crap my pants. :-)