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XJ Ask the Question Thread
CF Veteran
Joined: Oct 2013
Posts: 1,589
Likes: 2
From: Denver
Year: 99
Model: Cherokee
Engine: 4.0
My engine makes a hell of a knocking racket. What's the effectiveness of replacement of the rod bearings? Already done flexplate, etc. It's a noise down in the motor, and it speeds up a bit before disappearing, possibly due to oil pressure? Otherwise I'm just running it till it blows.
CF Veteran
Joined: Sep 2012
Posts: 1,623
Likes: 13
From: In a large sandbox
Year: 1998
Engine: 4.0
My engine makes a hell of a knocking racket. What's the effectiveness of replacement of the rod bearings? Already done flexplate, etc. It's a noise down in the motor, and it speeds up a bit before disappearing, possibly due to oil pressure? Otherwise I'm just running it till it blows.
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 102
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
My engine makes a hell of a knocking racket. What's the effectiveness of replacement of the rod bearings? Already done flexplate, etc. It's a noise down in the motor, and it speeds up a bit before disappearing, possibly due to oil pressure? Otherwise I'm just running it till it blows.
Probably piston slap.
RTD (Run To Destruction). Wait for the rod to come thru the crankcase, then it's motor time.
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
May be a Torque Converter issue.
While you're poking around pull the inspection cover from the bottom of the bell housing and see if it looks like something was scraping. Also check the bottom bell housing-to-engine block bolts for security. Uppers too, if you can see them.
While you're poking around pull the inspection cover from the bottom of the bell housing and see if it looks like something was scraping. Also check the bottom bell housing-to-engine block bolts for security. Uppers too, if you can see them.
CF Veteran
Joined: Sep 2012
Posts: 1,623
Likes: 13
From: In a large sandbox
Year: 1998
Engine: 4.0
Can anyone remember what their fuel pump sounds like when the ignition key is turned to the "on" position only. Been so long since I paid any attention, I honestly can't remember...
CF Veteran
Joined: Jul 2010
Posts: 4,930
Likes: 3
From: 802
Year: 99
Model: Cherokee
Engine: 4.0
R u kidding?? Lolz.. U must b joking. I am so in tune with every little noise my rig makes I can hear the noise in my brain space right nows!
Seasoned Member
Joined: Mar 2015
Posts: 280
Likes: 0
From: Portland, OR
Year: 1998
Model: Cherokee
Engine: 4.0L
Kind of like when you were a kid and your dad was out of town. Your mom thought you were finally asleep then, "vrrmmmmmmmmm". You sneeze, then it shuts off in an instant.
CF Veteran
Joined: Jul 2010
Posts: 4,930
Likes: 3
From: 802
Year: 99
Model: Cherokee
Engine: 4.0
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
CF Veteran
Joined: Oct 2013
Posts: 1,589
Likes: 2
From: Denver
Year: 99
Model: Cherokee
Engine: 4.0
CF Veteran
Joined: Jul 2010
Posts: 4,930
Likes: 3
From: 802
Year: 99
Model: Cherokee
Engine: 4.0
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,578
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I have a question maybe yall can help me. Been trying to track it down for a while but its occurrence only happens under load.
01 xj auto 4x4. When jeep goes from 3rd to 4th gear, I get this metallic rattling noise when about 2kish rpm. If I ease up on the accelerator, it goes away. It isn't always speed dependant. Usually shifts into 4th at 45 mph. In N and P no noise. Only under load. I've googled and what I've seen is this happening on manual transmission. No issues stated for aw4s.
Thanks in advance. Tried to be as descriptive as possible.
01 xj auto 4x4. When jeep goes from 3rd to 4th gear, I get this metallic rattling noise when about 2kish rpm. If I ease up on the accelerator, it goes away. It isn't always speed dependant. Usually shifts into 4th at 45 mph. In N and P no noise. Only under load. I've googled and what I've seen is this happening on manual transmission. No issues stated for aw4s.
Thanks in advance. Tried to be as descriptive as possible.
Junior Member
Joined: Dec 2012
Posts: 71
Likes: 0
From: Tacoma
Year: 1993
Model: Cherokee
Engine: 4.0L
Just for information's sake, what does the vacuum canister do?
For a bit of background, I've got a bone basic 2wd 93 Cherokee that had to have several vacuum lines disconnected for the last two months or so. I heard a leak and reattached everything, but had no noticeable change.
I know the reservoir does something with cruise control and the heat. Is there anything else it actually does? Just curious...
For a bit of background, I've got a bone basic 2wd 93 Cherokee that had to have several vacuum lines disconnected for the last two months or so. I heard a leak and reattached everything, but had no noticeable change.
I know the reservoir does something with cruise control and the heat. Is there anything else it actually does? Just curious...