Results 1 to 3 of 3

Thread: Coolant leak

  1. #1
    Join Date
    Dec 2016
    Location
    Weston, WV, USA
    Posts
    2
    My Cars
    2005 BMW 645 Ci

    Coolant leak

    My daughter has a 2005 645 Ci. There is a coolant leak on the passenger side of the car. I can see it on the plate on the bottom of the motor but I can't see where it's coming from. Any ideas? Thanks.

  2. #2
    Join Date
    Jan 2017
    Location
    Cambridgeshire
    Posts
    1
    My Cars
    BMW 645ci
    Hi,
    Check the lower radiator hose, it has a temperature sensor with an O-ring that can shrink over time and allow coolant to escape.

    I decided to just buy another sensor as opposed to the seal alone, as it wasn't too expensive.

    Sensor housing will have wet greenish coolant residue around it.
    20min fix.

    I had 2 leaks, this one was an easy fix, the other was the coolant transfer chest which involved stripping the engine, so went to an indy garage to fix that issue.

  3. #3
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    6,981
    My Cars
    2001 525it
    As far as back oof the engine your have the valley pan, the coolant plate that is on the block under neath the flywheel. Plastic expansion tank is on the passenger side and they crack all the time
    Last edited by jclausen; 01-22-2017 at 12:21 PM.

Similar Threads

  1. Ack, coolant leak....
    By MidnightBMW in forum 1991 - 1999 (E36)
    Replies: 5
    Last Post: 05-05-2003, 07:45 AM
  2. Coolant leak
    By mdibatti in forum 1991 - 1999 (E36)
    Replies: 3
    Last Post: 12-12-2002, 08:13 PM
  3. odd coolant leak
    By BCMike in forum 1983 - 1991 (E30)
    Replies: 8
    Last Post: 09-07-2002, 11:09 PM
  4. Internal coolant leak on my 91 318is
    By cohiba in forum 1983 - 1991 (E30)
    Replies: 0
    Last Post: 05-03-2002, 01:59 AM
  5. Coolant leak problem
    By fstbmwm3 in forum 1992 - 1999 M3 (E36)
    Replies: 3
    Last Post: 02-19-2002, 10:04 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •