Brake flush vs brake bleeding w/DIS

[Bagelfast]

Hey guys, I know these are two different things according to the repair manual TIS..

Brake flush will just change the old fluid for new fluid.

Brake bleeding using DIS to activate bleeding...

My question is, do these go hand in hand when changing or flushing the brake fluid, is bleeding required after flushing the brake fluid. Or is bleeding just a separate procedure for when needed.

[aussiem3]

+1 ...

[rantarM3]

I believe the bleeding procedure is used to get air out of the ABS module and/or the hard lines in the braking system. For a normal brake fluid flush, I have not heard of a dealer or shop performing the bleeding procedure, which activates the ABS pump. With a routine flush (i.e., ABS pump not activated), you'll get most of the old fluid out but some may remain in the pump itself. As you use the brakes, that old fluid should get diluted with the fresh fluid. So the bleeding procedure should be used only when replacing components that would cause air to get into the ABS pump or hard lines. At least that's my understanding.

[Amirsm3]

I would bleed the brakes if you introduced air into the system during the fluid flush.

[Bagelfast]

Originally Posted by rantarM3

I believe the bleeding procedure is used to get air out of the ABS module and/or the hard lines in the braking system. For a normal brake fluid flush, I have not heard of a dealer or shop performing the bleeding procedure, which activates the ABS pump. With a routine flush (i.e., ABS pump not activated), you'll get most of the old fluid out but some may remain in the pump itself. As you use the brakes, that old fluid should get diluted with the fresh fluid. So the bleeding procedure should be used only when replacing components that would cause air to get into the ABS pump or hard lines. At least that's my understanding.

Thanks,, that was my understanding aswell..

Originally Posted by Amirsm3

I would bleed the brakes if you introduced air into the system during the fluid flush.

Yea that was my thoughts aswell thanks

[cbrf23]

I'm preparing to do the fluid flush in the next week or two.
I am following the procedures outlined in shopkey (dealer/shop service manual).
From this it is my understanding that YES you do want to perform the DIS bleed after a brake fluid flush.

Also worth noting is if you have a manual transmission car you are also supposed to bleed the clutch slave cylinder after completing flush (the order of events isn't 100% clear as it's just a note, but the placement of the note makes me believe it is after brake fluid flush but before DIS bleed).


That said, if you did not do the DIS bleed you would still get out the majority of the fluid and I don't see it causing you trouble down the road. I just wanted to post what the shop manual stated.


The exact quote from the manual is:
Under heading 34 00 025 "REPLACING FLUID IN ABS/ASC+T BRAKE SYSTEM" the note at the very beginning of the article that says "IMPORTANT: When carrying out repairs to the brake system, follow the procedure set out in [34 00 050] Bleeding brake system with DSC" (heading 34 00 050 is the DIS procedure)

[Exclusivs]

Originally Posted by cbrf23

I'm preparing to do the fluid flush in the next week or two.
I am following the procedures outlined in shopkey (dealer/shop service manual).
From this it is my understanding that YES you do want to perform the DIS bleed after a brake fluid flush.

Also worth noting is if you have a manual transmission car you are also supposed to bleed the clutch slave cylinder after completing flush (the order of events isn't 100% clear as it's just a note, but the placement of the note makes me believe it is after brake fluid flush but before DIS bleed).


That said, if you did not do the DIS bleed you would still get out the majority of the fluid and I don't see it causing you trouble down the road. I just wanted to post what the shop manual stated.


The exact quote from the manual is:
Under heading 34 00 025 "REPLACING FLUID IN ABS/ASC+T BRAKE SYSTEM" the note at the very beginning of the article that says "IMPORTANT: When carrying out repairs to the brake system, follow the procedure set out in [34 00 050] Bleeding brake system with DSC" (heading 34 00 050 is the DIS procedure)

Bumping old thread -

How did this turn out for you? Where did clutch cylinder come into play?

Preparing to do as well! Thanks

[cbrf23]

I actually just took it to the dealer - it was less than $100 to have them change it over with the fluid I provided.

[marconi118]

how you do a DIS bleed ?

[cbrf23]

I assume the dealer did, but it's not like I could tell if they didn't, lol.

[dparm]

Originally Posted by cbrf23

I actually just took it to the dealer - it was less than $100 to have them change it over with the fluid I provided.

Wow, really? My dealer charges an hour of labor, which is well over $100.