|
Xoutpost server transfer and maintenance is occurring.... |
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management |
|
LinkBack | Thread Tools | Display Modes |
#11
|
||||
|
||||
Quote:
Note on 10-23-23: I can confirm that the brake bleed function is on my NT510 Elite; I saw it while testing my scan tool today. https://xoutpost.com/1234098-post8.html Ben got it to work, he says, and I sorta got the ABS bleed to work (somewhat) on my wife's old Cobalt. Oh, you do need to bench bleed a new master cylinder before installation https://youtu.be/qnsgCZVww54, though since I had no bench to work from, I did the MC priming via the brake pedal (with help from my neighbor).
__________________
01 BMW X5 E53,3.0i-5L40E, 7/13/01 topas-blau,Leder-grau,"resto-project car" Here: 14 Lexus ES350,3.5L-U660E 09 HHR Panel,2.2L-4T45E 04 Chevy 2500HD,6.0L-4L80E 98 GMC Sierra 1500,5.7L-4L60E Gone: 66 Chevelle Malibu 2dr ht.,327>441c.i.-TH350>PGlide/transbrake 08 Cobalt Coupe,2.2L-4T45E 69 & 75 C10s,350c.i.-TH350 86 S10,2.8L-700R4 73 Volvo 142,2.0L-MT4 72 & 73 VW SuperBeetles,1.6l-MT4 64 VW,1.2l-MT4 67 Dodge Monaco 500 2dr ht.,383c.i.-A727 56 Chevy 210 4dr,265c.i.-PGlide Last edited by workingonit; 10-23-2023 at 04:51 PM. Reason: added info |
Sponsored Links | |
|
#12
|
|||
|
|||
So I used ISTA to go through the brake bleeding procedure a few times. The pedal still slowly sinks to the floor when braking. A few pumps firms it up, but it will sink back down. I have run almost 3 litres of brake fluid through now.
One odd thing is that I will fill the reservoir to full and then it will drop slowly to half, then I fill it and it drops again. I did that three times before it stayed at full. There are no visible leaks anywhere, and it doesn’t look like it’s leaking into the brake booster. I have replaced the MC, the check valve, and the booster. I have no idea what to do now. I made an appointment at a local shop to bleed the system and give it a look. I hate doing it but I am at a complete loss. Any further tips would be helpful.
__________________
2004 4.8is Sapphire Black Metallic, cream/anthracite two-tone interior. |
#13
|
|||
|
|||
Make sure you explain to the shop what the problem is and what you have done.
__________________
1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) |
#14
|
|||
|
|||
I will, thanks for all the advice and help so far. I have never had this much trouble with an MC and brake booster replacement!
I’ll report back when I know more
__________________
2004 4.8is Sapphire Black Metallic, cream/anthracite two-tone interior. |
#15
|
|||
|
|||
I think that one of the problems that happen with these brake threads is that people think that the scan tool is actually activating the ABS pump to bleed the brakes. The brakes still need to be bled the normal way with the scan tool activating the ABS only to get rid of the air that might be trapped in that portion of the circuit. Not saying that is necessarily the case here but just thought I would get that out
__________________
1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) |
#16
|
|||
|
|||
Quote:
I ended up following the service process in ISTA that activated the pump as well as instructed pushing down the pedal with valves open. It says to pump the brakes until no air comes out. I always thought that you were supposed to only have the valve open when the pedal was being pushed down but it’s doesn’t mention that distinction in the instructions.
__________________
2004 4.8is Sapphire Black Metallic, cream/anthracite two-tone interior. |
#17
|
|||
|
|||
Yeah, pumping brakes till no air comes out is wrong. That can be done as a bit of a cheat to get by when you are alone and know what you are doing (pumping the pedal progressively less) but definitely not for a system that is giving trouble. What you are thinking is right.
I think a lot of that kind of thing is translation nuances. Still need to use some common sense and experience usually wins
__________________
1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) Last edited by 80stech; 10-28-2023 at 07:09 PM. Reason: add |
#18
|
|||
|
|||
Ok so I took it to the shop and they said the bled the brakes and machine bled them but the pedal is still soft.
Said that they suspect that the MC is faulty or wasn’t bench bled properly before install. It is a brand new MC and I did somewhat bench bleed the MC though I’m not sure if I did it enough. Is this not something a shop could take care of? How aggravating!
__________________
2004 4.8is Sapphire Black Metallic, cream/anthracite two-tone interior. |
#19
|
|||
|
|||
Yeh, that doesn't sound right, maybe try a different shop. "Machine bleeding," whatever that means, is not the answer. Maybe find a shop with some older guys who know how to bleed brakes and will know what is going on if there is more to it.
__________________
1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) |
#20
|
|||
|
|||
Another thing to check is that there is nothing keeping the master piston from going all the way back, shop should know that though.
__________________
1988 325is (purchased new) sold 2004 X5 3.0 2005 X3 2.5 2008 X5 3.0 (new to me) |
Bookmarks |
Thread Tools | |
Display Modes | |
|
|
|