2000 XJ 4.0L Engine Knock

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Feb 26, 2019 | 11:10 PM

Skeeter354

Thread Starter

Newbie

Joined: Sep 2018

Posts: 17

Likes: 0

Year: 2000

Model: Cherokee (XJ)

Engine: 4.0L

2000 XJ 4.0L Engine Knock

So when I start up the ol girl there is an engine knock, almost sounds like a rod knock but when the engine warms up it goes away. I've been searching for the culprit but came up empty handed. Any and all "2-cents" would be appreciated.

Feb 28, 2019 | 11:03 AM

DJXJ97

Member

Joined: Mar 2017

Posts: 108

Likes: 0

From: State Center Iowa

Year: 1997

Model: Cherokee(XJ)

Engine: 4.0L I6

Quote:

Originally Posted by Skeeter354

I've never really heard of knocking going away once warmed up. How loud is this "knock'?

Mar 1, 2019 | 06:50 AM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,577

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Probably a stuck lifter.

try this. Next time it does it, shut the engine off and wait 10 seconds. start it back up. What happens? "Knock" gone?

What brand oil filter are you using?

Mar 7, 2019 | 12:11 PM

Skeeter354

Thread Starter

Newbie

Joined: Sep 2018

Posts: 17

Likes: 0

Year: 2000

Model: Cherokee (XJ)

Engine: 4.0L

Just put new oil in and filter on both are Mobile 1 high milage 10w 30. I'll have to see if letting her run, shut er off, and fire her back up to see if it stops.

Mar 12, 2019 | 11:33 AM

DJXJ97

Member

Joined: Mar 2017

Posts: 108

Likes: 0

From: State Center Iowa

Year: 1997

Model: Cherokee(XJ)

Engine: 4.0L I6

Quote:

Originally Posted by Skeeter354

Just put new oil in and filter on both are Mobile 1 high mileage 10W 30. I'll have to see if letting her run, shut er off, and fire her back up to see if it stops.

Any luck?