Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.

Knocking when starting

Old May 2, 2010 | 10:25 PM
  #1  
M.WHEELER's Avatar
Thread Starter
Newbie
 
Joined: Mar 2010
Posts: 23
Likes: 0
From: Clover, SC
Year: 1992
Model: Cherokee
Engine: 4.0 H.O.
Default Knocking when starting

yesterday my jeep started knocking but its only when i start it, shut it off or when rev it up a little and let off. im pretty sure its coming from the motor is there anyone who has had a similar problem that would know where i need to start before i rip the whole motor apart?? any advice would be great. i was thinking that there might be some sludge built up some where so i bought some of that stuff u put add to the oil before you change it thats suposed to get rid of the sludge but that didnt do anything.
SOME BODY HELP

Any help would be greatly apreciated
Reply
Old May 2, 2010 | 10:43 PM
  #2  
bigjim350's Avatar
Registered Users
 
Joined: Feb 2010
Posts: 112
Likes: 0
From: New Caney, TX
Year: 1992
Model: Cherokee
Engine: 4.0
Default

Sounds like a loose flywheel bolts to me. Mine did the same thing. Just take off the inspection cover and check the bolts.
Reply
Old May 2, 2010 | 11:10 PM
  #3  
firstime00XJ's Avatar
Senior Member
 
Joined: Jan 2010
Posts: 712
Likes: 0
From: MI
Year: 2000
Model: Cherokee
Engine: 4.0 I6
Default

It is an automatic transmission, the noise you are hearing is most likely loose bolts on the torque converter. If it's a manual, x2 on the flywheel bolts. Please, when you post an issue, include statistics like auto or manual and what not. Thanks and good luck!
Reply
Old May 3, 2010 | 12:16 PM
  #4  
M.WHEELER's Avatar
Thread Starter
Newbie
 
Joined: Mar 2010
Posts: 23
Likes: 0
From: Clover, SC
Year: 1992
Model: Cherokee
Engine: 4.0 H.O.
Default

its automatic im gonna try that and ill let yall know how it goes
Reply
Old May 3, 2010 | 02:27 PM
  #5  
farmfuel's Avatar
Member
 
Joined: Nov 2008
Posts: 165
Likes: 0
From: Dallas
Model: Cherokee
Default

Get under the oil pan when you have someone start it. No one mentioned loose connection rods/ bad bearings. if it knocks when you first fire it up, that's the sound of dry bearings waiting on the oil pressure to build. Once the oil pressure goes up, the knock goes away, because the bearings are now gliding on oil. If you hear the knock from the oil pan, take it off and check the connecting rods for side to side freeplay. If you find any slop at all- that's where your knock is coming from
Reply
Old May 3, 2010 | 02:51 PM
  #6  
M.WHEELER's Avatar
Thread Starter
Newbie
 
Joined: Mar 2010
Posts: 23
Likes: 0
From: Clover, SC
Year: 1992
Model: Cherokee
Engine: 4.0 H.O.
Default

i just fixed it i was the torque converter bolts they were all loose
Reply
Old May 4, 2010 | 10:34 AM
  #7  
farmfuel's Avatar
Member
 
Joined: Nov 2008
Posts: 165
Likes: 0
From: Dallas
Model: Cherokee
Default

Thanks for reporting back your findings. It would be nice to see more folks report their fixes.

Most people will make a post with their symptoms, but once they fix it, they'll never write back and tell us what they did to cure the problem.
Reply
Old May 4, 2010 | 09:04 PM
  #8  
M.WHEELER's Avatar
Thread Starter
Newbie
 
Joined: Mar 2010
Posts: 23
Likes: 0
From: Clover, SC
Year: 1992
Model: Cherokee
Engine: 4.0 H.O.
Default

Originally Posted by farmfuel
Thanks for reporting back your findings. It would be nice to see more folks report their fixes.

Most people will make a post with their symptoms, but once they fix it, they'll never write back and tell us what they did to cure the problem.

no problem
Reply
Old May 5, 2010 | 06:38 PM
  #9  
firstime00XJ's Avatar
Senior Member
 
Joined: Jan 2010
Posts: 712
Likes: 0
From: MI
Year: 2000
Model: Cherokee
Engine: 4.0 I6
Default

Originally Posted by farmfuel
Thanks for reporting back your findings. It would be nice to see more folks report their fixes.

Most people will make a post with their symptoms, but once they fix it, they'll never write back and tell us what they did to cure the problem.
x2 on reporting back, we appreciate it. I'm glad it isn't connecting rods/bearings as that can be an expensive fix.
Reply
Old May 11, 2010 | 08:15 PM
  #10  
M.WHEELER's Avatar
Thread Starter
Newbie
 
Joined: Mar 2010
Posts: 23
Likes: 0
From: Clover, SC
Year: 1992
Model: Cherokee
Engine: 4.0 H.O.
Default

Originally Posted by firstime00XJ
x2 on reporting back, we appreciate it. I'm glad it isn't connecting rods/bearings as that can be an expensive fix.
ur tellin me i woulda been SOL if thats wat it was
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
BayArea93xj
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
Jun 11, 2016 10:43 AM
frantic29
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
16
Sep 26, 2015 04:30 PM
Gauge
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
19
Sep 3, 2015 09:37 PM
96blkjeep
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
Aug 26, 2015 08:43 PM
Gtrsrlly
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
5
Aug 25, 2015 11:50 AM

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

Thread Tools
Search this Thread

All times are GMT -5. The time now is 05:45 AM.