Results 1 to 10 of 40

Thread: 5HP18 Valve Body rebuild question

Threaded View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Join Date
    Feb 2015

    Default 5HP18 Valve Body rebuild question

    Car: 530iA Sedan Euro
    Transmission: ZF5HP18 "088"

    I am rebuilding a spare "088" 5HP18 transmission. I already did all the work on the driveline. I plan to rebuild the valve body next week. I will then slot the valve body into my current transmission (which runs excellent by the way) to ensure I did not screw up on the valve body so that, when installing the complete transmission + valve body, I know that when a problem arises, it's in the driveline. I have 2 problems:

    Problem 1: I do not know the diameter of the one way check ball.
    There is a one way check valve used when the manual "2" position is slected with the lever. I have ordered the part from ZF but I only get the plant pot, spring and cap. No ball. I also want to start using an aluminum ball but I do not know the diameter. I have looked in various forums and came across the same question asked by Shogun. A reply was that the ball measured about 4.56mm but afaik that was a ball from a used valve body so it may already have worn down to 4.56.

    Problem 2: I do not know how to calibrate the pressure regulator correctly.
    The 5HP18 repair manual states that the pressure regulator needs to be adjusted after any work done to the valve body or internals of the transmission. The repair manual does not say what or how to do this. I have not touched the pressure regulator yet. The pressure regulator is located in the solenoid block. It has a large torx screw on it. Any info on how to calibrate this piece is welcome.

    Any help or advice would be great. I have a large amount of photo's to share on how to strip the driveline. I will upload these somewhere on this forum.

    Name:  DSCN0414_zpsb67c198a.jpg
Views: 17517
Size:  80.8 KB

    Name:  DSCN0432_zps29786905.jpg
Views: 16579
Size:  78.6 KB
    Last edited by Frank87; 02-06-2015 at 06:16 AM.

Similar Threads

  1. 5HP30 Valve body rebuild
    By jofusfarr in forum 5 Series BMW
    Replies: 9
    Last Post: 11-30-2019, 07:32 AM
  2. Replies: 4
    Last Post: 11-14-2010, 06:03 PM
  3. 5HP30 valve body rebuild info
    By shogun in forum 5 Series BMW
    Replies: 2
    Last Post: 08-06-2010, 01:15 PM
  4. 5HP18 valve body removal
    By whiskychaser in forum 5 Series BMW
    Replies: 6
    Last Post: 02-19-2007, 01:18 PM
  5. 940540i valve body rebuild?
    By floydturbo in forum 5 Series BMW
    Replies: 5
    Last Post: 11-14-2005, 08:01 PM

Posting Permissions

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