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XJ Ask the Question Thread
Old fart with a wrench
Joined: Nov 2010
Posts: 14,398
Likes: 740
From: Manlius, east of Syracuse, NY
Year: 2000 XJ Sport & WJ Laredo
Model: Grand Cherokee (WJ)
Engine: 4.0L
We got it all...(warning, blast from the past) lol
https://www.cherokeeforum.com/f9/moment-when-143908/
https://www.cherokeeforum.com/f9/moment-when-143908/
CF Veteran
Joined: Aug 2015
Posts: 1,226
Likes: 11
From: Laurium, MI
Year: 1999
Model: Cherokee(XJ)
Engine: 4.0L
We got it all...(warning, blast from the past) lol
https://www.cherokeeforum.com/f9/moment-when-143908/
https://www.cherokeeforum.com/f9/moment-when-143908/
CF Veteran
Joined: Feb 2011
Posts: 1,048
Likes: 0
From: Georgia
Year: 2004
Model: Grand Cherokee (WJ)
Engine: 4.0 Inline 6
Got a question. Thinking about buying a 2001 XJ. A little on the skeptical side though due to all the issues I have heard about the 00-01' models. Should I steer clear of those years? Jeep is in good shape and has 176k miles.
Did all the 2000-2001's come with the bad heads or was it hit and miss? What was the deal with the injectors and heat making them boil or bowl?
Did all the 2000-2001's come with the bad heads or was it hit and miss? What was the deal with the injectors and heat making them boil or bowl?
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
Got a question. Thinking about buying a 2001 XJ. A little on the skeptical side though due to all the issues I have heard about the 00-01' models. Should I steer clear of those years? Jeep is in good shape and has 176k miles.
Did all the 2000-2001's come with the bad heads or was it hit and miss? What was the deal with the injectors and heat making them boil or bowl?
Did all the 2000-2001's come with the bad heads or was it hit and miss? What was the deal with the injectors and heat making them boil or bowl?
The thing is, you might drive an '01 for another decade without engine trouble, or it might blow up on the way home. Their bad reputation isn't because they all break; it's because a relatively large percentage have broken without any warning. It's a weaker casting, and reliability is a coin toss.
CF Veteran
Joined: Feb 2011
Posts: 1,048
Likes: 0
From: Georgia
Year: 2004
Model: Grand Cherokee (WJ)
Engine: 4.0 Inline 6
They all have the bad head, but it can be swapped it's worth it to you. And the heat soak issue can be fixed most easily with hood vents.
The thing is, you might drive an '01 for another decade without engine trouble, or it might blow up on the way home. Their bad reputation isn't because they all break; it's because a relatively large percentage have broken without any warning. It's a weaker casting, and reliability is a coin toss.
The thing is, you might drive an '01 for another decade without engine trouble, or it might blow up on the way home. Their bad reputation isn't because they all break; it's because a relatively large percentage have broken without any warning. It's a weaker casting, and reliability is a coin toss.
How hard is it to swap heads? What all is involved?
I guess the same could be said for buying a high mileage 99' and down. Engine could go at anytime I reckon. In some of the ads I have seen for Cherokee's, there are quite a few listed that have had engine swaps or rebuilds on the older models. I blame poor maintenance on that for the most part though. The earlier I6 seem to be bullet proof if they are maintained. How hard is it to swap heads? What all is involved?
CF Veteran
Joined: Feb 2011
Posts: 1,048
Likes: 0
From: Georgia
Year: 2004
Model: Grand Cherokee (WJ)
Engine: 4.0 Inline 6
CF Veteran
Joined: Feb 2011
Posts: 1,048
Likes: 0
From: Georgia
Year: 2004
Model: Grand Cherokee (WJ)
Engine: 4.0 Inline 6
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
That's like saying the D44a rear in a WJ is fine because your friend has one that isn't broken today.
Moderator of Jeeps
Joined: Jul 2011
Posts: 21,029
Likes: 3
From: Frederick, MD from Cleveland, OH
Year: 1993 YJ Wrangler
Engine: 4.0 I6
My ex has an '04 WJ with a working D44a, but we bought the extended warranty because they're known for blowing up during normal street driving.
It's a gamble. I hope you never encounter a reason to change your mind, but why would you want to gamble on something proven to be faulty when it's so easy to swap the head or to buy an earlier model that doesn't have three cats and four O2 sensors?
Last edited by NewKindOfClown; Aug 26, 2016 at 07:01 PM.






