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X3 E83 (2004 - 2010)
Talk about the E83 BMW X3 in this forum!

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  #1  
Old 01-15-2015, 06:23 PM
Lindel Lindel is offline
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07 x3 Spongy Brake

Hi Guys, i am soo in need of help, i have a x3 that hes been in an accident that impact the driver side fender area.

However, the brake is spongy and i took it to a mechanic on the ISLAND that service BMW. Now the mechanic had me replaced the master cylinder, it wasn't that, i replaced the brake booster that also did not work, the brakes system got bleed on every component install.

What i notice is when the jeep is off the peddle is stiff like normal, but the minute the engine is running, and the pedal is pressed, it slow sinks the the floor, like something is leaking. no signs of fluid leaking from anywhere.

When i drive the jeep the brake works but very sensitive and dangerous, and i believe thats operated by the hydraulic unit. Now i put the jeep in park to test the hydraulic, i pump the brakes several thine it builds pressure but slowly sinks. after about 3-5 pumps the just sinks rite in like something failed. it happen once you continuously pumping the brake.

Has anyone experience this or have any ideas as to what's causing the pedal to loose pressure? i need this issue resolve, an really need some help guys,

thanks
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  #2  
Old 01-15-2015, 07:40 PM
DangermouseX3 DangermouseX3 is offline
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Sounds like one of your replaced parts are faulty.

That is a classic sign of a bad master cylinder.
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  #3  
Old 01-16-2015, 04:13 AM
timarnold timarnold is offline
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Another possibility is that the brakes were bled improperly and you now have air in the ABS system. No amount of normal bleeding will correct this. The ABS pump has to be activated with something like the GT-1 diagnostic system. This is the only thing I have ever taken my X3 to the dealers for.
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  #4  
Old 01-18-2015, 04:12 AM
Lindel Lindel is offline
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Quote:
Originally Posted by DangermouseX3 View Post
Sounds like one of your replaced parts are faulty.

That is a classic sign of a bad master cylinder.
these are brand new oem parts, so i dont think its that.
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  #5  
Old 01-18-2015, 04:17 AM
Lindel Lindel is offline
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Quote:
Originally Posted by timarnold View Post
Another possibility is that the brakes were bled improperly and you now have air in the ABS system. No amount of normal bleeding will correct this. The ABS pump has to be activated with something like the GT-1 diagnostic system. This is the only thing I have ever taken my X3 to the dealers for.
well there is no bmw dealer here this is the suck part of it, i guess i need to get my hands on a GT-1 System, thanks for your help guys really appreciate it.
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  #6  
Old 01-18-2015, 07:35 AM
swampX3 swampX3 is offline
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INPA is a free download you can cycle abs with

http://www.bimmerforums.com/forum/sh...o-bleed-brakes

http://www.e90post.com/forums/showthread.php?t=598994

This is how I used INPA to bleed the ABS module.

Open INPA.
Select E46
Select Chassis
Select appropriate DSC (mine is MK60 for M3)
Select Activate (F6)
Have second person put pressure on brake pedal
Select either F2 or F3 (ABS FL RL or FR RR) depending on which one you are bleeding
When you hear the ABS buzz, open the bleed valve. It will then make a second noise where is activates the valves at which point the pedal will start going down in pulses and the fluid will start coming out the caliper.
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Last edited by swampX3; 01-18-2015 at 07:45 AM. Reason: add link
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  #7  
Old 01-18-2015, 07:53 AM
swampX3 swampX3 is offline
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vacuum bleeding

have had all kinds of ABS done this way

http://www.e90post.com/forums/showthread.php?t=149986


I can recommend the Mityvac. As its name suggests it uses vacuum rather than pressure so it connects to the brake bleed nipples and sucks the old fluid out. It also does not need a spare tyre with reduced pressure like some of the pressure bleeders do. It does require someone to top up the master cylinder reservoir periodically. I have used the Mityvac on my motorbike (BMW K1100 RS) which has ABS on numerous occasions and it has worked perfectly. I can't answer the tech questions on the e90 brake bleeding however when it gets around to the time when mine need doing I will be using the Mityvac in preference to coughing up to the stealers.

See http://cgi.ebay.co.uk/ws/eBayISAPI.d...%3D4%26ps%3D42

for details of the Mityvac.

Tony
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  #8  
Old 01-18-2015, 09:03 AM
Supercourse Supercourse is online now
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Quote:
Originally Posted by Lindel View Post
these are brand new oem parts, so i dont think its that.
I think your mechanic would have had to bench bleed the new master cylinder before installing it.

Maybe that was not done correctly?
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  #9  
Old 01-22-2015, 03:24 AM
Lindel Lindel is offline
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Quote:
Originally Posted by Supercourse View Post
I think your mechanic would have had to bench bleed the new master cylinder before installing it.

Maybe that was not done correctly?
who knows, i wont be taking my x3 to anyone else, i ordered the diagnostic software and will try to resolve the issue myself, too much money is been wasted on the same issue.
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  #10  
Old 04-07-2015, 02:44 PM
Lindel Lindel is offline
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Quote:
Originally Posted by swampX3 View Post
http://www.bimmerforums.com/forum/sh...o-bleed-brakes

http://www.e90post.com/forums/showthread.php?t=598994

This is how I used INPA to bleed the ABS module.

Open INPA.
Select E46
Select Chassis
Select appropriate DSC (mine is MK60 for M3)
Select Activate (F6)
Have second person put pressure on brake pedal
Select either F2 or F3 (ABS FL RL or FR RR) depending on which one you are bleeding
When you hear the ABS buzz, open the bleed valve. It will then make a second noise where is activates the valves at which point the pedal will start going down in pulses and the fluid will start coming out the caliper.
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i finally got the software going and will attemp to check the ABS, follow your steps and see if it works if not i will repost for sure.
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  #11  
Old 04-07-2015, 05:33 PM
Lindel Lindel is offline
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hey guys, does anyone know how to bleed the abs using ISTA/P? need some help new to the software.

Last edited by Lindel; 04-07-2015 at 05:35 PM. Reason: typo
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  #12  
Old 07-07-2015, 04:02 PM
Lindel Lindel is offline
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Quote:
Originally Posted by Lindel View Post
Hi Guys, i am soo in need of help, i have a x3 that hes been in an accident that impact the driver side fender area.

However, the brake is spongy and i took it to a mechanic on the ISLAND that service BMW. Now the mechanic had me replaced the master cylinder, it wasn't that, i replaced the brake booster that also did not work, the brakes system got bleed on every component install.

What i notice is when the jeep is off the peddle is stiff like normal, but the minute the engine is running, and the pedal is pressed, it slow sinks the the floor, like something is leaking. no signs of fluid leaking from anywhere.

When i drive the jeep the brake works but very sensitive and dangerous, and i believe thats operated by the hydraulic unit. Now i put the jeep in park to test the hydraulic, i pump the brakes several thine it builds pressure but slowly sinks. after about 3-5 pumps the just sinks rite in like something failed. it happen once you continuously pumping the brake.

Has anyone experience this or have any ideas as to what's causing the pedal to loose pressure? i need this issue resolve, an really need some help guys,

thanks
Hi Guys, so i took the time and review the my x3 n52 enging an the brake setup, and found out the vacuum pump was the culprit all along. I had the machanic replace the pump, and after the test drive on of the tensioners broke off, just my luck. So here is the part i really need to understand;

how do i replace the tensioner?
Do i need to access it from the top (Head) or the bottom (Oil Pan)?
Is the tensioner sold as one unit (assembly) or i can replace the missing tensioner?

If a tecnician or expert can shead spme light here that would be great, thanks

Last edited by Lindel; 07-07-2015 at 04:06 PM.
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  #13  
Old 07-08-2015, 05:24 AM
swampX3 swampX3 is offline
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a good link

hope this is what you need .....if not .....please give us a bit more detail/pictures etc

https://www.google.com/url?sa=t&rct=...96952980,d.cGU

this is from an earlier engine series but they are all close to the same .....you ca buy spare pulley wheels etc but there are two basic choices of tensioner .....mechanical and hydraulic ......put the last seven of your VIN in real oem .com and check you part numbers/details

https://www.google.com/url?sa=t&rct=...96952980,d.cGU

Last edited by swampX3; 07-08-2015 at 05:28 AM. Reason: add info
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  #14  
Old 07-08-2015, 05:30 AM
swampX3 swampX3 is offline
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realoem.com tensioner generic search

http://www.realoem.com/bmw/enUS/show...diagId=11_5094


http://www.realoem.com/bmw/enUS/show...diagId=11_2190

Last edited by swampX3; 07-08-2015 at 05:31 AM. Reason: add link
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  #15  
Old 07-08-2015, 05:34 AM
swampX3 swampX3 is offline
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tensioner generic image files

you can get megggga info from the image attachments

https://www.google.com/search?q=bmw+...g&ved=0CB4QsAQ


shop around ....the full kit is good if you have the bucks for it

https://www.google.com/search?q=bmw+...g&ved=0CHEQsxg

Last edited by swampX3; 07-08-2015 at 05:35 AM. Reason: add info
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  #16  
Old 07-08-2015, 09:59 AM
swampX3 swampX3 is offline
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budget tensioner get you by's

if you're on a tight budget .....if its a rough bearing that's messing up your tensioner.....you can push out the bearing in the plastic pulley and push a new one in .....we use motion industries to buy all kinds of odd big and small bearings......there's probably some place near you could beg, borrow one

another temp fix is to pop the bearing seals out with a pick and inject some grease......not a long term solution though....just a get you home


you can also use parts from other auto wrecker tensioners .....many of them share the same parts/bearings/pulley wheels
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  #17  
Old 07-08-2015, 12:17 PM
Lindel Lindel is offline
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Location: St. Thomas VI
 
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Quote:
Originally Posted by swampX3 View Post
if you're on a tight budget .....if its a rough bearing that's messing up your tensioner.....you can push out the bearing in the plastic pulley and push a new one in .....we use motion industries to buy all kinds of odd big and small bearings......there's probably some place near you could beg, borrow one

another temp fix is to pop the bearing seals out with a pick and inject some grease......not a long term solution though....just a get you home


you can also use parts from other auto wrecker tensioners .....many of them share the same parts/bearings/pulley wheels
thanks for your help, but the vehicle cant move, an i wont risk starting it since the vacuum pump is out and that tensioner is someplace down in the crank case. this is such stupid design on these engines, but i know there must be a easy way to replace the tensionier.
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  #18  
Old 07-08-2015, 01:39 PM
swampX3 swampX3 is offline
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belt or cam chain tensioner ????

sounds like you meant the camshafts tensioner/chain guides ????.....is it the tensioner tip that sits to the upper left in this pic ????

http://forum.e46fanatics.com/attachm...1&d=1333019211


maybe parts 9,10,11 or 12 in this

http://www.realoem.com/bmw/enUS/show...diagId=11_1339

Last edited by swampX3; 07-08-2015 at 02:58 PM. Reason: add link
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  #19  
Old 07-08-2015, 03:35 PM
swampX3 swampX3 is offline
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pic link of tensioner

if small parts of this tensioner (see link below) have dropped in the sump you are not alone .....many engines have bits and pieces in the sump that live there forever or until we overhaul them and find them laying around/stuck on the oil screen or stuck to the magnetic tip of the oil drain plug....also the 54 engine has a home in the sump for many O rings that get pushed thru when the dipstick tube is refitted.....boroscope tips are another find


replacing this style tensioner is an easy diy....search youtube

https://dyw03owr7vs3n.cloudfront.net...10004100-1.jpg
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  #20  
Old 07-09-2015, 04:53 PM
Lindel Lindel is offline
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Quote:
Originally Posted by swampX3 View Post
sounds like you meant the camshafts tensioner/chain guides ????.....is it the tensioner tip that sits to the upper left in this pic ????

http://forum.e46fanatics.com/attachm...1&d=1333019211


maybe parts 9,10,11 or 12 in this

http://www.realoem.com/bmw/enUS/show...diagId=11_1339
no, not that tensioner, the one for the oil pump chain. That is a real pain to get to on the N52 engines.
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