Engine Woes
Herp Derp Jerp
Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Thread Starter
Seasoned Member
Joined: Sep 2012
Posts: 505
Likes: 0
From: Oceano, Ca
Year: 2000
Model: Cherokee
Engine: ATK 4.0L I6 w/ AEM Brute Force inatke, 748 Injectors
Senior Member
Joined: Jan 2012
Posts: 952
Likes: 4
Year: 2004
Model: Grand Cherokee
Engine: 2000 4.0
X2 Not all 0331 heads in 2000 & 2001 crack. Chrysler used multiple sand molds to cast these heads but I don't think it was ever pinned down to a certain mold. The move to the Brazilian "tuppy" head was a cost cutting measure. The tuppy specs and design were still Chrysler's. It was cheaper to sub-contract than it was to re-tool.
Thread Starter
Seasoned Member
Joined: Sep 2012
Posts: 505
Likes: 0
From: Oceano, Ca
Year: 2000
Model: Cherokee
Engine: ATK 4.0L I6 w/ AEM Brute Force inatke, 748 Injectors
The piston rattle or piston slap has nothing to do the the 0331 head. If im gonna get something new i just wanna avoid that head. From what i know its the piston becoming loose in the cylinder and rattling and some of our xjs live long happy lives with it, some dont. Mine seems to be getting worse quickly so i want to prepare if i can
CF Veteran
Joined: Aug 2010
Posts: 1,150
Likes: 1
From: Nashville, TN
Year: 1997, 1993
Model: Cherokee
Engine: 4.0L
Run a little heavier weight oil. 15-40 Rotella works well and will reduce the slap and slow the progression.
As for the engine you want:
a 2000-2001 with a tupy head.
a 2000-2001 with an 0331 head and plan on replacing it with one from alabama cylinder head
an older 4.0 and change the ignition system to the coil pack ignition
As for the engine you want:
a 2000-2001 with a tupy head.
a 2000-2001 with an 0331 head and plan on replacing it with one from alabama cylinder head
an older 4.0 and change the ignition system to the coil pack ignition
Thread Starter
Seasoned Member
Joined: Sep 2012
Posts: 505
Likes: 0
From: Oceano, Ca
Year: 2000
Model: Cherokee
Engine: ATK 4.0L I6 w/ AEM Brute Force inatke, 748 Injectors
Im currently searching around for a tupy 0331 headed block and ive also added restore as per multiple suggestions. Im only 500 miles into my current oil (10-40) so an oil change is not soon but i may just swap it to see what happens
CF Veteran
Joined: Apr 2012
Posts: 5,302
Likes: 23
From: Wisconsin
Model: Cherokee
CF Veteran
Joined: Aug 2010
Posts: 8,357
Likes: 103
From: Canton, MI
Year: 1999
Model: Cherokee
Engine: 4.0
The piston rattle or piston slap has nothing to do the the 0331 head. If im gonna get something new i just wanna avoid that head. From what i know its the piston becoming loose in the cylinder and rattling and some of our xjs live long happy lives with it, some dont. Mine seems to be getting worse quickly so i want to prepare if i can
Say goodnight Gracie.
Last edited by CCKen; Jul 4, 2013 at 11:32 AM.
::CF Moderator::
Joined: Aug 2011
Posts: 43,971
Likes: 1,579
From: Prescott, Az
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Thread Starter
Seasoned Member
Joined: Sep 2012
Posts: 505
Likes: 0
From: Oceano, Ca
Year: 2000
Model: Cherokee
Engine: ATK 4.0L I6 w/ AEM Brute Force inatke, 748 Injectors
Ahhh the truth, so fun to read haha. No tick tick boom!!!!
When i say "quickly" I'm describing the sound going from "is this thing clicking??" To noticeable frequent over the course of a few months. Its not by any means loud but to me someone might as well be hitting ME with a hammer haha. 😲🔨 I hate new nosies
When i say "quickly" I'm describing the sound going from "is this thing clicking??" To noticeable frequent over the course of a few months. Its not by any means loud but to me someone might as well be hitting ME with a hammer haha. 😲🔨 I hate new nosies