knocking sound

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Oct 15, 2012 | 01:15 AM

cjw212

Thread Starter

Newbie

Joined: Jun 2012

Posts: 14

Likes: 0

From: Portland, OR

Year: 1999

Model: Cherokee

Engine: 4.0L

knocking sound

so at idle and low rpms i can hear a knocking from the passenger side just behind the firewall but cant hear it when under the hood. anyone got an idea of what this may be?

Oct 15, 2012 | 01:47 AM

Char92dj8

Senior Member

Joined: Mar 2010

Posts: 919

Likes: 0

From: Florida

Year: 1989

Model: Cherokee

Engine: 4.0

Sounds like a flexplate knock to me.

Oct 15, 2012 | 02:14 AM

ZINGGG

CF Veteran

Joined: Oct 2011

Posts: 4,440

Likes: 3

From: Seal Beach, CA

Year: 1996

Model: Cherokee

Engine: 4.0 HO Straight Six

Try this:
https://www.cherokeeforum.com/f51/ho...ocking-125547/

Oct 16, 2012 | 12:46 AM

cjw212

Thread Starter

Newbie

Joined: Jun 2012

Posts: 14

Likes: 0

From: Portland, OR

Year: 1999

Model: Cherokee

Engine: 4.0L

thanks ill give that a try and see what happens. hopefully its just loose bolts.

Oct 19, 2012 | 10:58 PM

cjw212

Thread Starter

Newbie

Joined: Jun 2012

Posts: 14

Likes: 0

From: Portland, OR

Year: 1999

Model: Cherokee

Engine: 4.0L

so i took it apart and tightened the bolts and such and still there is a knocking. no cracks nothing wrond and torqued to spec. anything else that could be the issue?

Oct 19, 2012 | 11:10 PM

1976Mustang

CF Veteran

Joined: May 2012

Posts: 3,242

Likes: 2

From: Colorado

Year: 1992 Cherokee Sport

Engine: Bone-Stock 242

Piston knock most likely, something you shouldn't have to worry about. Can you make a video of the sound?

Oct 20, 2012 | 05:33 AM

coloradocherokee

Member

Joined: Mar 2012

Posts: 205

Likes: 0

From: Severance, Colorado

Year: 1999

Model: Cherokee (XJ)

Engine: 4.0 litre, line 6

Most likely the solenoid thing for ac/heater

knocking sound

knocking sound

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