Engine knock, please help identify, VIDEO
06-22-2011, 09:33 PM
#1
Junior Member
Thread Starter
Join Date: Mar 2010
Location: Bakersfield, CA
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1993
Model: Cherokee
Engine: I6 4.0L HO
Engine knock, please help identify, VIDEO
93 jeep cherokee
4.0, 6 cyl, 4x4, automatic tran, 220k mi
tends to happen when idling.
just did an oil change and replaced spark plugs doing tune-up to prepare my toy /wifes daily driver for summer. trying to fix this knock as well.
06-23-2011, 06:00 PM
#3
Junior Member
Join Date: Jun 2011
Location: Goodyear, Az
Posts: 82
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: 4.0
seems rotational like something connected to the belt. When giving it a bit of gas I wonder if it is the speeding up making it do it.
if not, it could be something broken or vibrating as it is very rythmic
if not, it could be something broken or vibrating as it is very rythmic
06-23-2011, 06:10 PM
#4
Junior Member
Thread Starter
Join Date: Mar 2010
Location: Bakersfield, CA
Posts: 58
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1993
Model: Cherokee
Engine: I6 4.0L HO
06-23-2011, 07:38 PM
#5
Senior Member
Join Date: May 2010
Location: MI 48642
Posts: 882
Likes: 0
Received 1 Like
on
1 Post
Year: 1996
Model: Cherokee
Engine: 4.0
possibly...possibly your flex plate, or maybe your exhaust is rattling. Check your motor mounts, if they are bad you may have something knocking when the engine vibrates more. That is the easy stuff to check, you can go from there if you have to.
Edit: forgot to watch the second video, I have no idea why the AC would effect anything I listed above, sorry :/
Edit: forgot to watch the second video, I have no idea why the AC would effect anything I listed above, sorry :/
06-23-2011, 07:52 PM
#6
CF Veteran
Join Date: Mar 2008
Location: South Side Chicago
Posts: 2,088
Likes: 0
Received 2 Likes
on
2 Posts
Year: 1992, 2- 1998 (All 3, 4 Doors)
Model: Cherokee
Engine: 4.0L in all
I second the motor mount idea... That's about the only idea I can think of with that kind of sound...
Trending Topics
06-24-2011, 12:08 AM
#10
CF Veteran
Join Date: May 2009
Location: Glen Burnie, MD
Posts: 1,844
Likes: 0
Received 3 Likes
on
3 Posts
Year: 1994
Model: Cherokee
Engine: 4.0 H.O. K&N, Borla headers, custom down pipe, magnaflow hi-flo cat, flowmaster to turn down tip
listen to the exhaust and have some one else rev it (dont stick your ear infront of the exhaust pipe, just next to it near the exit), and listen if you can hear the knock from there, if not then it is probably not internal motor knock, i second the motor mount idea
Thread
Thread Starter
Forum
Replies
Last Post
jhamXJ
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
11
11-09-2021 08:20 AM
Jamesmon4
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
1
08-16-2016 09:04 PM
Ye Ol' Cherokee
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
10-09-2015 10:29 PM
carson
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
1
09-02-2015 08:26 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)