Project Patience....a 90 MJ DD/Trail Sleeper. - Page 12 - Jeep Cherokee Forum
Jeep Cherokee Forum


Jeep Builds Make your own jeep build thread here, discuss and view jeeps here. All Jeep models are welcome here.

Project Patience....a 90 MJ DD/Trail Sleeper.

Reply
 
 
 
Thread Tools Search this Thread
Old 01-01-2018, 01:09 PM   #166
CF Veteran
 
Join Date: Apr 2016
Location: Pasquotank, NC
Posts: 1,220

View bad_idea's Photo Album My Photos
Year: 1990
Model: Cherokee
Engine: 4.0
Default

You could bypass the heater core to make the vehicle operational. Will make for a cold ride, but at least you can use it.
bad_idea is offline   Reply With Quote
Old 01-01-2018, 11:31 PM   #167
CF Veteran
Thread Starter
 
WyoCherokee's Avatar
 
Join Date: Jan 2015
Location: Gillette Wyoming
Posts: 1,044

View WyoCherokee's Photo Album My Photos
Year: 1990
Model: Comanche
Engine: 4.0
Default

Quote:
Originally Posted by bad_idea View Post
You could bypass the heater core to make the vehicle operational. Will make for a cold ride, but at least you can use it.
at temps of negative 5 for a high, and negative 25 for a low for the next few weeks, ill just park it and drive the diesel haha.
WyoCherokee is offline   Reply With Quote
Old 02-10-2018, 08:33 PM   #168
CF Veteran
Thread Starter
 
WyoCherokee's Avatar
 
Join Date: Jan 2015
Location: Gillette Wyoming
Posts: 1,044

View WyoCherokee's Photo Album My Photos
Year: 1990
Model: Comanche
Engine: 4.0
Default

Well i tried to get the ac system evacuated today, but nobody is open on a Saturday. And since I work 4am to 6pm, I miss everyone' hours during the week. Hopefully I can get it in on Friday. So today I just did some tinkering. Took the headlight buckets and the group 34 battery from my 96 xj. Ordered a new brake proportioning valve so i can swap in a WJ booster and get rid of the load sensing valve. Just wairing on parts now.
Was -10 this morning, but the sun was intense.
Chrome headlight buckets from the 96.
" />Measured out the perch widths on the 8.8 i need to build up. 5.5" in to center from the cast ebrake spindle. Kind of worried about the deistance of the perch from the caliper.
WyoCherokee is offline   Reply With Quote
Old 02-12-2018, 12:21 AM   #169
CF Veteran
Thread Starter
 
WyoCherokee's Avatar
 
Join Date: Jan 2015
Location: Gillette Wyoming
Posts: 1,044

View WyoCherokee's Photo Album My Photos
Year: 1990
Model: Comanche
Engine: 4.0
Default

Started on the brake system overhaul. First step was to delete the Height Sensing Valve. Important to note, i will be using an XJ brake proportioning valve, and removing the MJ valve.

I used this Coupler:


to joint the 3/8's lines at the T-fitting here:


This line comes from the lower front of the Distribution valve( do this setup if you are switching to an XJ valve, otherwise you will use a different rear brake hose and use a different feed line if you are keeping the MJ valve.)

Remove the load sensing valve from the frame, and unhook the 7/16s line from the sensing valve.

Install your extended rear line( i just used Rusty's XJ extended lines)



Once the last remaining parts come in tomorrow, i will finish the install noted for the distribution valve and the front brake lines.
WyoCherokee is offline   Reply With Quote
Old 02-12-2018, 05:51 AM   #170
CF Veteran
 
Join Date: Apr 2016
Location: Pasquotank, NC
Posts: 1,220

View bad_idea's Photo Album My Photos
Year: 1990
Model: Cherokee
Engine: 4.0
Default

I haven't played with an MJ, so take this advice for what it cost you.

Why don't you turn the brake hose around and attach it to the line running forward, deleting the short section of tubing and coupling? Would be easy enough to fab up a bracket to bolt to the frame rail to attach the hose end to. Could probably mod the existing bracket to work in the new position.
bad_idea is offline   Reply With Quote
Old 02-12-2018, 07:14 AM   #171
CF Veteran
Thread Starter
 
WyoCherokee's Avatar
 
Join Date: Jan 2015
Location: Gillette Wyoming
Posts: 1,044

View WyoCherokee's Photo Album My Photos
Year: 1990
Model: Comanche
Engine: 4.0
Default

Quote:
Originally Posted by bad_idea View Post
I haven't played with an MJ, so take this advice for what it cost you.

Why don't you turn the brake hose around and attach it to the line running forward, deleting the short section of tubing and coupling? Would be easy enough to fab up a bracket to bolt to the frame rail to attach the hose end to. Could probably mod the existing bracket to work in the new position.
By doing it that way, i would lose a good 2 feet of length to the rear axle. Not good when you have lifted the jeep. Mjs are unique in that they have a load sensing valve that is essentially a proportioning valve. It takes the bed height and changes how much fluid the rear brakes get depending on how much weight is in the bed. This means that there are 2 lines running To the rear, not just 1 like a cherokee. By doing this, I simply created a XJ brake system. So essentially what you see is no different than your XJ. The only difference, is the rear hard line originally led to a 3 way TEE that fed the rear axle hose, and the load valve. In removing this tee, you couple the feed line together, and leave the return line open. The only other way to do this, is to swap in the rear hard feed line from an XJ. OR use a hose with a 7/16s double flare fitting from the return line to the axle.

Last edited by WyoCherokee; 02-12-2018 at 08:36 AM.
WyoCherokee is offline   Reply With Quote
Old 02-12-2018, 03:52 PM   #172
CF Veteran
 
Join Date: Apr 2016
Location: Pasquotank, NC
Posts: 1,220

View bad_idea's Photo Album My Photos
Year: 1990
Model: Cherokee
Engine: 4.0
Default

Gotcha. Carry on.
bad_idea is offline   Reply With Quote
Old 02-12-2018, 10:21 PM   #173
CF Veteran
Thread Starter
 
WyoCherokee's Avatar
 
Join Date: Jan 2015
Location: Gillette Wyoming
Posts: 1,044

View WyoCherokee's Photo Album My Photos
Year: 1990
Model: Comanche
Engine: 4.0
Default

Front brake lines are on. Still waiting on the xj valve to get here to complete the system.
WyoCherokee is offline   Reply With Quote
Old 02-14-2018, 12:26 AM   #174
CF Veteran
Thread Starter
 
WyoCherokee's Avatar
 
Join Date: Jan 2015
Location: Gillette Wyoming
Posts: 1,044

View WyoCherokee's Photo Album My Photos
Year: 1990
Model: Comanche
Engine: 4.0
Default

XJ Valve is in. It's a tight squeeze getting the rear lower fitting screwed in, especially if you have big hands. Bled everything with help from a buddy, and she stops way better! I actually feel safe slamming on the brakes now. I recommend screwing in the lower fitting first, then the rear fitting, then the top fittings, and use stubby wrenches.
WyoCherokee is offline   Reply With Quote
Old 02-14-2018, 12:27 AM   #175
CF Veteran
Thread Starter
 
WyoCherokee's Avatar
 
Join Date: Jan 2015
Location: Gillette Wyoming
Posts: 1,044

View WyoCherokee's Photo Album My Photos
Year: 1990
Model: Comanche
Engine: 4.0
Default

Double Post

Last edited by WyoCherokee; 02-14-2018 at 09:39 AM. Reason: double post
WyoCherokee is offline   Reply With Quote
Old 02-14-2018, 05:11 AM   #176
CF Veteran
 
Join Date: Apr 2016
Location: Pasquotank, NC
Posts: 1,220

View bad_idea's Photo Album My Photos
Year: 1990
Model: Cherokee
Engine: 4.0
Default

Hope you washed all of that brake fluid off of the inner fender/firewall.
bad_idea is offline   Reply With Quote
Old 02-14-2018, 09:38 AM   #177
CF Veteran
Thread Starter
 
WyoCherokee's Avatar
 
Join Date: Jan 2015
Location: Gillette Wyoming
Posts: 1,044

View WyoCherokee's Photo Album My Photos
Year: 1990
Model: Comanche
Engine: 4.0
Default

Quote:
Originally Posted by bad_idea View Post
Hope you washed all of that brake fluid off of the inner fender/firewall.
Yep. Brake fluid wreaks havoc on paint.
WyoCherokee is offline   Reply With Quote
Old 02-17-2018, 04:20 AM   #178
CF Veteran
Thread Starter
 
WyoCherokee's Avatar
 
Join Date: Jan 2015
Location: Gillette Wyoming
Posts: 1,044

View WyoCherokee's Photo Album My Photos
Year: 1990
Model: Comanche
Engine: 4.0
Default

Well that was a fun day changing the heater core. Took about 9 hours from yanking the seats, to getting the dash fully re installed. And I'm still not done. My carpet was completely soaked from snow and coolant, so I'm waiting on it to dry before I put it back in. Right now I'm working on eliminiting the POs super scetchy fog light and light bar wiring. Building all new relay harnesses from scratch. What a PIA.




WyoCherokee is offline   Reply With Quote
 
 
Reply



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

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 11:30 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: