Jump to content

1986 MJ 2.5L 4x4 | "Heavy Four"


Recommended Posts

  • Replies 191
  • Created
  • Last Reply

Top Posters In This Topic

On 12/4/2017 at 9:11 AM, 88whitemanche said:

Great progress! 

I see that your plugged the egr valve...

what plug did you use for the bottom part of it? 

Mine has been frozen since I’ve gotten mine and the exhaust hose that plugs into the intake has plenty holes in it and the fumes are at times overbearing in stop and go traffic...

i plan to get a later model manifold but didn’t know what to do with the bottom part of the egr....

The underside of the intake manifold does not need anything sealed up when you stick a block off plate on top.

 

The new exhaust manifold I bought covered 86-01 2.5's (I think). Since most of those years did not have an EGR valve, the manifold came with a block off plate already installed. You can see the block off plate just ahead of the O2 sensor in this pic.

IMG_20171212_215805.thumb.jpg.ddace51f655b7a901232b05a9895ce05.jpg

Link to comment
Share on other sites

7 hours ago, 87Warrior said:

The underside of the intake manifold does not need anything sealed up when you stick a block off plate on top.

 

The new exhaust manifold I bought covered 86-01 2.5's (I think). Since most of those years did not have an EGR valve, the manifold came with a block off plate already installed. You can see the block off plate just ahead of the O2 sensor in this pic.

IMG_20171212_215805.thumb.jpg.ddace51f655b7a901232b05a9895ce05.jpg

Nice 

I ended up finding the thread size (m22-1.5) on the bottom of the intake lol and bought Dorman part # 090-055 3-pack for $15 on amazon 

and for the top I bought one of those Route 66 block off plates off of fleabay...

next order of business would be either a stainless steel header set off fleabay or a pacesetter header...but I like that idea that your manifold already came with a block offplate already, easier to just throw it on and not worry about anything 

Link to comment
Share on other sites

  • 2 years later...
On 1/29/2020 at 9:27 PM, TheDirtyJeep401 said:

Any new updates? I need more inspiration to get mine going. And well..... This truck is one of my biggest inspirations lol. 

Not much has changed with this old truck. I do have some work to do. It has been sitting for 3 months with a blown brake line, but it will probably be spring before I have the shop space to start the work.

- Needs a new rear brake line. The one on the truck rusted through.

- Needs a new fuel tank. A rock put a pinhole in the bottom of the tank.

- Needs a new speedometer cable. Speedometer has been intermittent to not working the last 2 years.

- I have a 231 ready to go to replace the 207 transfer case. I'll probably tackle this when I do the speedometer cable.

 

I did get this cool pic of a Praying Mantis on the truck when putting air in a tire last summer. Not sure how I feel about the critter turning 'rust color' to camouflage itself :laugh:

image.png.6536fead2257984ffc9db157c61a0e4e.png

Link to comment
Share on other sites

  • 11 months later...

I did manage get the truck back on the road in October of 2020. 

 

[Another] new 23 gallon Spectra fuel tank installed and a new Wix fuel filter. I did not bother painting this one. I also patched up the brake line that blew out above the driver rear shock with some 3/16" Copper-Nickle tubing. My patch and flare hasn't started to leak yet :brows:

PXL_20201011_202815454.NIGHT.jpg.2620d5033ec84acc554e6588f8df5a7b.jpg

 

 

The speedometer doesn't work more than it does work. I have the two styles of cables sitting on the work bench, I just haven't had the time to get it replaced! 

 

A malfunctioning speedometer hasn't stopped me from loving this truck.

PXL_20201012_234425538.PORTRAIT.jpg.a3eda44c98dd1833f1a87d95c792acbb.jpg

 

It has been 9 years since I bought this MJ and I still absolutely love it! The rust has grown exponentially over the years, but I continue to rinse out the frame every year. This year I will treat the inside of the frame with Woolwax. Hopefully I can get a few more years out of it.

Edited by 87Warrior
Redo picture upload
Link to comment
Share on other sites

  • 2 weeks later...
  • 11 months later...

This old truck has probably been the most reliable vehicle I own! It has been so reliable I have taken it for granted and some basic upkeep has been neglected over the years. The alternator has been squealing for years, the tires have dry rot, the ride is bouncy, it generally handled like crap on the road and during the latest cold snap the engine never warmed up.  

 

The first order of business was replacing the thermostat. I also chose to replace the water pump at the same time since I have never touched it. The water pump bearings were rough so it was time. Based on the grime on the timing chain cover, I suspect a front main seal replacement might need done in the future.

PXL_20220115_181006451.NIGHT.jpg.382001d3cf1d5eeef7ace1ae879ef5ad.jpg

 

I installed a new (remanufactured) alternator and belts (Gates/Bando). This truck is still sporting a 4.0 HO thermostat housing. I replaced the retrofitted HO IAT with a good used Renix IAT from @eaglescout526 and I replaced the Oxygen sensor with a new Denso unit. It idles a whole lot smoother now! 

PXL_20220119_160021740.jpg.a198f7d028838cb2d709bf812e2b6385.jpg

 

I then turned my attention to the suspension, which involved lowering the truck back down to near stock height. Don't get me wrong, I loved the way this truck sat! The problem was that some of the lift components needed replaced and since it needed new tires I made the choice to go with smaller tires so the 2.5 is more happy on the highway.

 

I removed the poor fitting 2" Chevy drop shackles I had been running since 2012. I attribute some of the poor handling this truck had these tall shackles with a worn out bushing. A bitter sweet moment was removing the Bilstein rear shocks I bought from Don @HOrnbrod years ago... but I know he would agree these shocks needed replaced!

PXL_20220117_211456941.jpg.d4f623e247e81f9705bd8d0e4b0c98fc.jpg

 

I replaced the shackles with a set of used JKS shackles and I replaced the shocks with parts store KYB 'gas-a-just' shocks. It started to look like the MJ was trying out that new "squat" fad. 

PXL_20220117_220416639.jpg.e05fba97f337b003039a6d58b2a32292.jpg

 

Up front I replaced the old RE TJ lift springs with new Moog CC782 XJ Upcountry springs I bought from @Billabob. I also replaced the worn YJ Monroe shocks with another set of KYB "gas-a-just" shocks. 

PXL_20220118_025333980.NIGHT.jpg.9d43a72e6e1c2a742f08e91d8e1f00b3.jpg  

 

I finished up the front end with a new Moog trackbar to replace the RE1600 and new Moog swaybar links since the bushings in JKS disconnects I had been running simply disintegrated.

 

The 'grandpafication' of this truck is almost complete with steel wheels. 

PXL_20220118_222800415.PORTRAIT.jpg.a84b406dec6ef9e409c21dc559609add.jpg

 

I still have a lot of work to do to this old truck. I am planning a DIY replacement windshield (used glass from a 93 XJ) replacement, install a 231 transfer case, replace the steering gearbox and power steering pump (again; I lost the power steering return hose and suspect it cooked the pump), install a new speedometer cable and of course, new tires to replace the worn out tires on these replacement steel wheels.

Link to comment
Share on other sites

  • 2 weeks later...

I lost brakes, again, in the truck when a car pulled out in front of me and I had to stand on the pedal. The original Ford line on the 8.8 sprung a leak on a rusty part of the tube. Ordered a replacement from Inline Tube versus bending my own. 

PXL_20220124_214703723.jpg.4138ba11dd2aa325bbb01d0afd51cd03.jpg

 

I also reset my toe-in to 1/16". After lowering the truck it toe-ed out by about 1/2". It always boggles my mind knowing how much the toe changes when the ride height changes. You can see the rusty pile of goo that was in the adjuster sleeve. It look a lot of PB Blaster and heat to break free.

PXL_20220129_183436658.jpg.c421a490fa62b11ca19b707ef7486b3f.jpg

 

After being home for 5 days with the covid, I decided to take the truck to the family farm and harvest some firewood. I am not sure which one of us was more excited to leave the house :laugh:

PXL_20220128_214658729.jpg.22e2efcf237c7ad096888fc5040333e4.jpg

 

I've also replace the headlight switch and installed a headlight harness. Since the coolant overflow tank cap was cracked I replaced it with a Dorman 82594. She also got some new tires! I opted to try the Hankook DYNAPRO AT2 in 235/75R15. These have the 3 peak snow rating and seem to ride on the snow without an issue. 

PXL_20220202_161017790.PORTRAIT.jpg.8bf9cfad1a49b3882416875df7aae69f.jpg

 

Link to comment
Share on other sites

  • 3 months later...

In preparation for the springtime gardening season I put the topper back on the truck. The plants seem to appreciate some wind protection when headed down the highway. Here the truck is sporting the topper and a couple more "speed holes" that have formed in the bedside...

 image.jpeg.b904fb405c5d329d8fdb6af0dac358b3.jpeg

 

image.jpeg.6b29095781fe99bbd2339054fa3ccc9f.jpeg

 

While driving through a typical Kansas thunderstorm I noticed my driver side floorboard was filling with water. The water was dripping over the fusebox and into the floor. I need to investigate the water issue further, but I suspect the windshield needs replaced and some metal might need repaired around the windshield frame.

 

*sigh* I was hoping the truck would been trouble free for the rest of this year!

 

Link to comment
Share on other sites

  • 2 weeks later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share


×
×
  • Create New...