Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.

Rear brake hard pipe connection fitting

Thread Tools
 
Search this Thread
 
Old Sep 2, 2025 | 10:22 AM
  #16  
Wrongholefool's Avatar
Seasoned Member
10 Year Member
Liked
 
Joined: Apr 2016
Posts: 327
Likes: 83
From: Pittsburgh
Year: 1999, 1996X3, 1997
Model: Cherokee (XJ)
Engine: 4.0
Default

Lasted for almost 30 years on my XJ's.
Reply
Old Sep 2, 2025 | 10:39 AM
  #17  
XJ2MTNS's Avatar
Semper Discens
Premium Member
Community Builder
Liked
Loved
Community Favorite
 
Joined: Jun 2025
Posts: 367
Likes: 131
From: Near The Peaks, VA
Year: 2000
Model: Cherokee (XJ)
Engine: 4.0
Default

I wish I would have paid closer attention to this connection. I feel like it had to be a male to female style connection to work. Not like your pictures where it is male to male.
Reply
Old Sep 2, 2025 | 02:58 PM
  #18  
BruceB's Avatar
CF Veteran
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2014
Posts: 1,102
Likes: 364
From: Eustis, Florida
Year: 1996
Model: Cherokee (XJ)
Engine: 4.0
Default

I am assuming you have hardware stores that carry copper plumbing.
You will need two flare nuts and a flare joint.
You will cut off the existing flares, install the proper size flare nuts and flare the ends.
They may be able to flare the two lines if your take them with you.


Reply
Old Sep 4, 2025 | 05:46 PM
  #19  
WhiteyNorge's Avatar
Thread Starter
Newbie
 
Joined: Aug 2025
Posts: 11
Likes: 1
Default

Hey,

I would also add a little more to this discussion. The Dorman kit is using a bubble style flare to a double style flare connection. The bubble in this case has a flat 90deg back, which suggests it is a DIN mushroom flare, ISO 4038, with a 32.5deg flare. This is mated to a SAE 45deg double flare, SAE J 533. This is quite an angular mismatch, as a normal SAE 45deg double flare will go into a 42.5deg seat. It is also a material mismatch, steel on steel. If you are connecting steel pipes, then you will typically use brass connectors/unions to join them, as the brass is softer and flows around the steel as they are mated/torqued together. If you are using a steel flare into a steel seat, such as connecting a pipe to a brake hose or brake cylinder, or for example to the proportioning valve, then you are relying on a 45/42.5deg interface smoothly fitting together at a close angle with minimal material flow.

To be clear, I still do not know what the original Mopar/Jeep flare to flare connection looks like between the short pipe and long pipe going from proportioning valve to the rear brake hose. I do not know what flare types were used by Mopar/Jeep.

I cannot be certain the Dorman kit has replicated the original Mopar/Jeep connection, and this seems unlikely, as ISO 4038 comes from the year 1996, already 12 years past the start date for XJ production.

If someone has their original brake pipes, and can take photos of the flares in this connection, this will clear up everything.

There are no simple solutions when it comes to brake pipe unions!

Best

Mark



Reply
Old Sep 6, 2025 | 11:37 PM
  #20  
Wrongholefool's Avatar
Seasoned Member
10 Year Member
Liked
 
Joined: Apr 2016
Posts: 327
Likes: 83
From: Pittsburgh
Year: 1999, 1996X3, 1997
Model: Cherokee (XJ)
Engine: 4.0
Default

Have you asked dorman about their product design?
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fb97xj1
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
Jul 9, 2019 01:17 AM
2k_Xj
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
18
May 14, 2012 10:26 PM
jonjon99xj
Cherokee Chat
15
Oct 27, 2010 07:17 PM
kimcrwbr1
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
Aug 14, 2010 12:08 AM
Jeeeeep
Fabrication & builders section.
13
Jul 5, 2010 12:20 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 



All times are GMT -5. The time now is 01:16 AM.