Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Arnott
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-03-2012, 01:12 PM
Member
 
Join Date: Jan 2012
Location: isle of wight uk
Posts: 145
zetecor is on a distinguished road
Water in gearbox ecu.

Hi garage have told me after (after seven weeks and a trans rebuild) that they think my 'trans fail prog' is being caused by water in the trans ecu. How can water get in there, where is it? I have to top my coolant up every six weeks but cannot find any leaks could coolant find its way there? they are fitting a used part next week.

many thanks.
__________________
E53 ,4.4i , 2002
55k
Reply With Quote

Sponsored Links

  #2  
Old 11-03-2012, 05:07 PM
amacman's Avatar
Member
 
Join Date: May 2008
Location: glasgow,scotland
Posts: 1,462
amacman is on a distinguished road
The transmission and engine ECU are in a container located on the left side of the engine bay at the bulkhead .The container lid is secured by a few screws .It is positioned where the brake booster and master cylinder would be on a left hand drive model .
BMW TIS shows it .BMW TIS - 12 14 550 Replacing control unit (Digital Motor Electronics) (M62, M54)
The containers can allow water ingress causing damage .Coolant will not get in there . The coolant leak needs proper investigation as there are many possibilities with the most difficult to find being the valley pan and pipes at the rear of the engine .
I saw your post on another thread about BBA- Reman demanding money with menaces , what is that all about , have they done a full refurb on your transmission . Did you sign a work order authorising the work . The lack of detail makes it sound disturbing .
__________________
Artificial intelligence is no match for real stupidity

Last edited by amacman; 11-03-2012 at 05:18 PM.
Reply With Quote
  #3  
Old 11-03-2012, 05:24 PM
Member
 
Join Date: Jan 2012
Location: isle of wight uk
Posts: 145
zetecor is on a distinguished road
Hi,
thanks for that at least I can rule out coolant ingress and will need to look for rainwater
problems. No haven't used BBA-REMAN, were just looking for feedback on them after a gearbox specialist reconditioned my gearbox but failed to solve 'trans fail prog' and then suspected gearbox ecu failure.
When they removed the gearbox ecu they have told me it has been affected by water. So going to fit used one.
__________________
E53 ,4.4i , 2002
55k
Reply With Quote
  #4  
Old 11-07-2012, 01:07 AM
civdiv99's Avatar
Member
 
Join Date: Jan 2011
Location: Yakima, WA
Posts: 413
civdiv99 is on a distinguished road
If you got water in there, then I am impressed. Been blasting through pond-like puddles at 90 per?
Reply With Quote
  #5  
Old 11-07-2012, 01:56 AM
swissfrank's Avatar
Member
 
Join Date: Jul 2007
Location: Vancouver, British Columbia
Posts: 503
swissfrank is on a distinguished road
Quote:
Originally Posted by zetecor View Post
Hi garage have told me after (after seven weeks and a trans rebuild) that they think my 'trans fail prog' is being caused by water in the trans ecu. How can water get in there, where is it? I have to top my coolant up every six weeks but cannot find any leaks could coolant find its way there? they are fitting a used part next week.

many thanks.
Not to sound rude, but I think it is time for a second opinion. However it is possible (but not likely) for water to pool at the connector, by pulling the connectors off and inspecting carefully for water damage or corrosion would show if this is the case or not.
Reply With Quote
  #6  
Old 11-07-2012, 05:39 AM
Member
 
Join Date: Jan 2012
Location: isle of wight uk
Posts: 145
zetecor is on a distinguished road
Hi, they have told me that there was corrosion in there due to water, they are fitting replacement used one this week, fingers crossed.
__________________
E53 ,4.4i , 2002
55k
Reply With Quote
  #7  
Old 10-08-2020, 02:21 PM
Member
 
Join Date: Oct 2020
Location: UK
Posts: 4
BigBazzarati is on a distinguished road
Hi. For the record, I have a 3.0i which regularly sucks coolant into the middle socket on the ECU. You can tell it's coolant cos it's blue and tastes of Glycol. Everything else is dry and it's an easy process to clean up but I'm concerned that one of the pins on the ECU will soon break due to the corrosion occurring in there. Have recently covered everything in WD40 for protection whilst I work out my next move. No idea how the coolant is entering the loom but it's presumably osmosis or static draw that's pulling it in there.
Reply With Quote
  #8  
Old 10-08-2020, 02:36 PM
Member
 
Join Date: Jan 2012
Location: isle of wight uk
Posts: 145
zetecor is on a distinguished road
Mine got fixed with the replacement
__________________
E53 ,4.4i , 2002
55k
Reply With Quote
  #9  
Old 10-08-2020, 02:37 PM
Member
 
Join Date: Oct 2020
Location: UK
Posts: 4
BigBazzarati is on a distinguished road
Any idea how the water was getting into the old one?
Reply With Quote
  #10  
Old 10-08-2020, 02:38 PM
Member
 
Join Date: Jan 2013
Location: Finland
Posts: 571
Clavurion is on a distinguished road
Quote:
Originally Posted by BigBazzarati View Post
Hi. For the record, I have a 3.0i which regularly sucks coolant into the middle socket on the ECU. You can tell it's coolant cos it's blue and tastes of Glycol. Everything else is dry and it's an easy process to clean up but I'm concerned that one of the pins on the ECU will soon break due to the corrosion occurring in there. Have recently covered everything in WD40 for protection whilst I work out my next move. No idea how the coolant is entering the loom but it's presumably osmosis or static draw that's pulling it in there.
Most likely cause is the connector on thermostat housing.

https://www.newtis.info/tisv2/a/en/e...0i-sav/V3OzlYg
__________________
E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 05:00 PM.
vBulletin, Copyright 2020, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.