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4.0 freeze plugs.

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Old Sep 24, 2014 | 12:59 PM
  #1  
sealclubber's Avatar
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From: summit valley california
Year: 89
Model: Wagoneer
Engine: 4.0
Default 4.0 freeze plugs.

Hey guys.about 6 months ago my 89 waggy decided to be a prob child....deal was to good to be true...PO had dumped stop leak in...I DIDNT NOTICE IT TIL A FEW DAYS LATER WHEN THE BRAND NEW COOLANT BOTTLE HAD ALL OF A SUDDEN TURNED BRIGHT ORANGE.!!
So did the cooling system dance about 3000 times..flush and fill and on and on. Thinking just lack of maintenance cuz waggy ran extremely well. About the 3001th flush and normal coolant color appeared is when i noticed the green cat killing puddle underneath.
Heres my question...after dealing with 3 injectors spitting fuel..replacing vaccum lines..burnt harness pieces and trying to work my way down the renix tips list,all in order to have a DD...im pretty much over it...Pull the engine or drop the tranny? Im gonna do all the plugs...i know intake and exhaust have to come out...but would it be better on my bad back to drop tranny and replace plugs or pull the engine? I dont wanna do job twice so i figured do em all at once....Anyone done it both ways that can weigh in? Im ready to drop a for sale sign on her!
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Old Sep 24, 2014 | 11:06 PM
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perez1989's Avatar
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From: Pharr, Texas
Year: 1989
Model: Cherokee
Engine: 4.0L
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Pulling the motor is easier. To many parts to drop the tranny.
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Old Sep 25, 2014 | 08:34 AM
  #3  
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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Originally Posted by perez1989
Pulling the motor is easier. To many parts to drop the tranny.
I agree.
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Old Sep 26, 2014 | 07:19 AM
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From: Pharr, Texas
Year: 1989
Model: Cherokee
Engine: 4.0L
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Mine started leaking too. It is the last one on the side of the block. Going to have to take out the motor to fix. Gonna do the oil pan, rear main seal, and timing chain while the motor is out.
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Old Sep 26, 2014 | 07:51 AM
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cruiser54's Avatar
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From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
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One of the easiest engines to pull.

Loosen the upper 2 bell housing bolts FIRST.
Attached Thumbnails 4.0 freeze plugs.-bell-housing-bolts.jpg   4.0 freeze plugs.-e12-socket.jpg  
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Old Sep 28, 2014 | 01:49 PM
  #6  
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From: summit valley california
Year: 89
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Thx for the responses!
Had a feeling the motor needed to come out...oh well might as well rebuild while its out.Give me a chance to clean up engine bay also...
thanks guys
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Old Sep 28, 2014 | 02:49 PM
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From: Nor-Cal Coast
Year: 90,84
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Engine: 4.0,2.5
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Myself, I wouldn't pull the engine unless it was plugs leaking on the rear, under the torque plate. With the manifolds off you can reach the side ones OK.
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Old Sep 28, 2014 | 03:12 PM
  #8  
cruiser54's Avatar
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Originally Posted by DFlintstone
Myself, I wouldn't pull the engine unless it was plugs leaking on the rear, under the torque plate. With the manifolds off you can reach the side ones OK.
I'll let you in on a little secret.


If one is rusting through, they all are........
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Old Sep 28, 2014 | 03:25 PM
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Turbo X_J's Avatar
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From: ☼ Blackhole Sun
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Originally Posted by sealclubber
I DIDNT NOTICE IT TIL A FEW DAYS LATER WHEN THE BRAND NEW COOLANT BOTTLE HAD ALL OF A SUDDEN TURNED BRIGHT ORANGE.!!
Yank it, great time to get the block boiled out & have new cam bearings installed.
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Old Sep 28, 2014 | 03:35 PM
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From: Nor-Cal Coast
Year: 90,84
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Originally Posted by cruiser54
I'll let you in on a little secret. If one is rusting through, they all are........
I know, I'd gamble, myself. I don't gather there is any need to pull the manifolds to pull the engine, if that turns out to be necessary.
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Old Sep 28, 2014 | 04:11 PM
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From: summit valley california
Year: 89
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Engine: 4.0
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Originally Posted by Turbo X_J
Yank it, great time to get the block boiled out & have new cam bearings installed.
Ya thats the plan..
Spoke to previous owner says i coulda swore i told you it had a freeze plug leak? just throw more stop leak in...been doing it for years..
Made me a lil mad..what infuriated me though was that he offered to buy it back after I fixed it....Ya 2 mill buddy.
......and so continues my dam xj addiction.
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Old Sep 28, 2014 | 04:15 PM
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From: ☼ Blackhole Sun
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Originally Posted by sealclubber
Spoke to previous owner says i coulda swore i told you it had a freeze plug leak?
"The truth comes out a little at a time" - Miranda Lambert
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