Random knocking noise from 4.0l that is not knocking the same as the rpms

Reply Subscribe

Thread Tools

Search this Thread

Nov 27, 2015 | 09:49 PM

Luke Shrum

Thread Starter

Newbie

Joined: Nov 2015

Posts: 2

Likes: 0

Model: Cherokee

Random knocking noise from 4.0l that is not knocking the same as the rpms

I have a 2000 jeep Cherokee 4.0l with automatic transmission. It started knocking the other day right after I got a car wash (not sure if that had to do with it) but it started knocking at idle and the rpms were very low, it was a very loud random knock. It stop idling and had to get it towed home because I did not want to mess anything up more than I already had. Any help with what this might be would be great, Just bought the cherokee a couple months ago (156,000 miles) any help would be amazing to get it running good again

Nov 28, 2015 | 01:24 PM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

This:

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

Dec 7, 2015 | 09:36 PM

Luke Shrum

Thread Starter

Newbie

Joined: Nov 2015

Posts: 2

Likes: 0

Model: Cherokee

Quote:

Originally Posted by cruiser54

This: it will not start now, it is having a hard time turning over, I also tried to jump it... No luck

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

it will not start now, it is having a hard time turning over, I also tried to jump it... No luck

Dec 8, 2015 | 01:30 AM

dcollins3208

Member

Joined: Jul 2015

Posts: 206

Likes: 0

Hopefully it isn't, but sounds like broken timing chain

Dec 8, 2015 | 06:04 AM

CCKen

CF Veteran

Joined: Aug 2010

Posts: 8,357

Likes: 103

From: Canton, MI

Year: 1999

Model: Cherokee

Engine: 4.0

Could be the Camshaft Position Sensor Oil Pump Drive.

You'll need to remove Camshaft Position Sensor and see if there's any damage, if okay then remove the Oil Pump Drive to examine the drive gear and see if the shaft is ate up.