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Old Jul 15, 2011 | 07:42 AM
  #5806  
dasbugin's Avatar
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From: Long Island
Year: 1998
Model: Cherokee
Engine: 4.0
Default Crank Shaft Bearings

Does anyone know of a walk through or like a how to on doing crank shaft bearings on a 4.0 motor i just need to know like the the torque specs and what i can expect when i drop the pan..

also would a slightly crushed exhaust pipe cause the check engine light to come on? or i guess that's just a result of the bad bearings

lastly i read a post that said knocking from the bottom side of the motor could be a slightly loose torque convertor ... how likely is that the knocking is super loud and i just don't wanna waste my time doing one thing if its something else the truck idles great no noise or just a slight one then as soon as u hit the throttle it knocks rly loud then higher rpms its gone

any ideas welcome thanx guys
Old Jul 15, 2011 | 08:21 AM
  #5807  
wildspear's Avatar
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Joined: May 2010
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From: Western Michigan
Year: 1993
Model: Grand Cherokee
Engine: 4.0l inline 6
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Originally Posted by dasbugin
Does anyone know of a walk through or like a how to on doing crank shaft bearings on a 4.0 motor i just need to know like the the torque specs and what i can expect when i drop the pan..

also would a slightly crushed exhaust pipe cause the check engine light to come on? or i guess that's just a result of the bad bearings

lastly i read a post that said knocking from the bottom side of the motor could be a slightly loose torque convertor ... how likely is that the knocking is super loud and i just don't wanna waste my time doing one thing if its something else the truck idles great no noise or just a slight one then as soon as u hit the throttle it knocks rly loud then higher rpms its gone

any ideas welcome thanx guys
I have never done the bearings myself but try this link;

http://www.ehow.com/how_5748334_repl...-bearings.html

I couldn't find much in a "How too" but that should give you a good start. I don't believe a exhaust would give you an engine light unless it was really damaged and where it was damaged. The exhaust pipes do have oxygen sensors in it so maybe one of those were damaged. Have you ran a scan for codes? For the low end knocking, have you opened up the inspection plate and checked the flex plate bolts? Those can loosen over time and cause a knocking sound.
Old Jul 15, 2011 | 05:31 PM
  #5808  
Customizer1000's Avatar
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Joined: Jan 2011
Posts: 11,176
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From: Ohio
Year: 1995
Model: Cherokee
Engine: 4.0
Default

My question is why close such a fun thread?
Old Jul 16, 2011 | 12:48 AM
  #5809  
xj guy's Avatar
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Joined: Jan 2011
Posts: 730
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From: Joliet, Il
Year: 1996
Model: Cherokee
Engine: HO4.0 I6
Default

Just a question about exhaust. From what I have gathered ideally we want 2.25-2.5 diameter on our exhaust pipes correct? I plan on taking care of my exhaust by replacing the CAT and everything back. But my real question is, to achieve the 2.25 diameter am I going to have to replace anything upstream from the CAT? What size are those stock pipes?
Old Jul 16, 2011 | 12:55 AM
  #5810  
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From: Ohio
Year: 1995
Model: Cherokee
Engine: 4.0
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Mine is 2.5 all the way with a flowmaster 40, it breathes well
Old Jul 16, 2011 | 06:31 AM
  #5811  
dasbugin's Avatar
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From: Long Island
Year: 1998
Model: Cherokee
Engine: 4.0
Default

Originally Posted by wildspear
I have never done the bearings myself but try this link;

http://www.ehow.com/how_5748334_repl...-bearings.html

I couldn't find much in a "How too" but that should give you a good start. I don't believe a exhaust would give you an engine light unless it was really damaged and where it was damaged. The exhaust pipes do have oxygen sensors in it so maybe one of those were damaged. Have you ran a scan for codes? For the low end knocking, have you opened up the inspection plate and checked the flex plate bolts? Those can loosen over time and cause a knocking sound.
IT WAS the flex plate i rly couldnt believe it ... sounded just bearings thanx for your help i love these jeeps soo easy to fix!!!
Old Jul 16, 2011 | 08:58 AM
  #5812  
zimbobwye's Avatar
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Posts: 295
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From: Roscoe, IL
Year: 2000
Model: Cherokee
Engine: 4.0L 242 Power Tech I6
Default

..what happens if i replace my original rear spring(which may not be heavy duty), with the original "heavy duty" I realize that the arch sizes are different, and probably a stiffer ride. But, will they bolt right on?
Old Jul 16, 2011 | 09:00 AM
  #5813  
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Joined: Oct 2010
Posts: 1,756
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From: Salem Nh
Year: 1998
Model: Cherokee
Engine: 4.0
Default

Originally Posted by xj guy
Just a question about exhaust. From what I have gathered ideally we want 2.25-2.5 diameter on our exhaust pipes correct? I plan on taking care of my exhaust by replacing the CAT and everything back. But my real question is, to achieve the 2.25 diameter am I going to have to replace anything upstream from the CAT? What size are those stock pipes?
Stock piping is 2.25"
Old Jul 16, 2011 | 11:06 AM
  #5814  
sycoglitch's Avatar
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From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Default

i posted in the wanted section but also figured id ask you guys too. If anyone has a part our rig that they can see if they have the wirimg with connector for the cargo bay light. I have an 01. I appreciate it. And i know this is off topic, srry but im usually on this thread reading more than others
Old Jul 16, 2011 | 11:50 AM
  #5815  
DocBoCook's Avatar
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Joined: Jun 2011
Posts: 120
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From: Indianapolis
Year: 1996
Model: Cherokee
Engine: Inline 6 4.0 H.O.
Default

Originally Posted by sycoglitch
i posted in the wanted section but also figured id ask you guys too. If anyone has a part our rig that they can see if they have the wirimg with connector for the cargo bay light. I have an 01. I appreciate it. And i know this is off topic, srry but im usually on this thread reading more than others
Don't have a diagram, but the are pink, purple and yellow
Old Jul 16, 2011 | 12:08 PM
  #5816  
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From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Default

Originally Posted by DocBoCook

Don't have a diagram, but the are pink, purple and yellow
Yea. The switch leg wire burned up the connector so when I open the hatch the lights won't stay on cause of it. I need that connector and like 4 inches of wire to connect to my wires so I can have light again when hatch is open
Old Jul 16, 2011 | 06:44 PM
  #5817  
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Posts: 711
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From: provo, utah
Year: 1995
Model: Cherokee
Engine: 4.0
Default

What is going on??!!! My power steering goes out on long trip and if I let it rest a dayit will work agin what is up is it going out or is it something else? Helo
Old Jul 16, 2011 | 07:46 PM
  #5818  
sycoglitch's Avatar
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From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
Default

Originally Posted by DocBoCook

Don't have a diagram, but the are pink, purple and yellow
I just read what I originally posted and I botched it up. I meant to ask if anyone has a "part out" rig if they can send me the connector for the cargo bay light. I don't know how I wrote that so horribly wrong before.
Old Jul 17, 2011 | 03:31 AM
  #5819  
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Joined: Apr 2011
Posts: 51
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Year: 1998
Model: Cherokee
Engine: 4.0 I6
Default

Won't turn over! Lights dim here a click and fuel pump engage but nothing else! Please help!
Old Jul 17, 2011 | 07:19 AM
  #5820  
DocBoCook's Avatar
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Joined: Jun 2011
Posts: 120
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From: Indianapolis
Year: 1996
Model: Cherokee
Engine: Inline 6 4.0 H.O.
Default

Originally Posted by sycoglitch

I just read what I originally posted and I botched it up. I meant to ask if anyone has a "part out" rig if they can send me the connector for the cargo bay light. I don't know how I wrote that so horribly wrong before.
That sucks. Literally just threw one away Wednesday night. Sorry man



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