1998 Cherokee knock only when warm
#1
Newbie
Thread Starter
Join Date: Jan 2019
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee (XJ)
1998 Cherokee knock only when warm
I've got a 1998 Cherokee 148xxx.
On a cold start she sounds great but after a few minutes/warms up a steady light knock starts up. It almost sounds like a rattle can. It doesn't get louder when i accelerate and I don't have a loss of power . It sound like it's coming from the beginning of the transmission or maybe even the bottom end of the engine.
The front of the teeth of the flexplate have small wear marks so I thought maybe the starter was rubbing. I changed the starter no luck. I even started it then took the starter completely off while it was running but she was still knocking.
So all in all I've checked for cracks in the flexplate, tightened the flexplate bolts with loctite and changed the starter with no luck. Any ideas?
On a cold start she sounds great but after a few minutes/warms up a steady light knock starts up. It almost sounds like a rattle can. It doesn't get louder when i accelerate and I don't have a loss of power . It sound like it's coming from the beginning of the transmission or maybe even the bottom end of the engine.
The front of the teeth of the flexplate have small wear marks so I thought maybe the starter was rubbing. I changed the starter no luck. I even started it then took the starter completely off while it was running but she was still knocking.
So all in all I've checked for cracks in the flexplate, tightened the flexplate bolts with loctite and changed the starter with no luck. Any ideas?
Last edited by Stone Keys; 01-28-2019 at 09:52 AM.
#3
Newbie
Thread Starter
Join Date: Jan 2019
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee (XJ)
I've checked for that as well the exhaust is tight and clear of everything. If I'm listening to the engine under the hood I can barely hear it but when I'm standing on the driver side and passenger side it's a very noticeable knock. When I'm up underneath it sounds like it's right where the tranny and engine meet
#4
CF Veteran
Join Date: Nov 2017
Location: Groton, MA
Posts: 3,695
Received 234 Likes
on
207 Posts
Year: 1995
Model: Cherokee(XJ)
Engine: I6 4.0L
It sounds like you've got the usual suspects covered then - exhaust hitting the cross-member, flex plate loose, etc.
Is it possibly the catalytic converter? (Thinking the catalyst loose and rattling...)
Perhaps someone smarter than myself can advise further.
Is it possibly the catalytic converter? (Thinking the catalyst loose and rattling...)
Perhaps someone smarter than myself can advise further.
Thread
Thread Starter
Forum
Replies
Last Post
kustomlarry
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
01-27-2016 05:47 PM
wakebum2507
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
1
09-30-2014 04:01 AM
1TUFFXJ
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
13
01-06-2011 11:58 PM
jeeporiwalk
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
04-29-2010 05:28 PM
lukkywun007
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
9
08-15-2009 01:16 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)