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XJ Ask the Question Thread
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
So I'm going to be buying a junkyard engine pretty soon and I'm going to go ahead and replace some things on it. I was thinking VC, oil filter, rms and head gasket. Water pump, thermostat and timing chain. What else do you think? Bearings? Lifters? I'd just like to eliminate somethings that often fail.
Since you're taking the head off do lifters and pushrods at the least, I might throw in valves, springs, and rockers if I could afford it.
CF Veteran
Joined: Oct 2012
Posts: 2,314
Likes: 3
From: Canton, GA
Year: 1996
Model: Cherokee
Engine: 4.0
Jeep is taking a bit longer than usual to start. Usually starts after less than a second but it's been taking 2-3 seconds to crank.. only when I first start it. After that, I can turn it off and right back on really quickly. This means the battery is on its way out the door, right?
Herp Derp Jerp

Joined: Nov 2011
Posts: 18,251
Likes: 17
From: Parham, ON
Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Jeep is taking a bit longer than usual to start. Usually starts after less than a second but it's been taking 2-3 seconds to crank.. only when I first start it. After that, I can turn it off and right back on really quickly. This means the battery is on its way out the door, right?
RUN (3s)
OFF
RUN (3s)
OFF
RUN (3s)
START
If it fires right up you can either keep doing that or drop the tank and replace the fuel check valve.
CF Veteran
Joined: Oct 2012
Posts: 2,314
Likes: 3
From: Canton, GA
Year: 1996
Model: Cherokee
Engine: 4.0
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
So I'm going to be buying a junkyard engine pretty soon and I'm going to go ahead and replace some things on it. I was thinking VC, oil filter, rms and head gasket. Water pump, thermostat and timing chain. What else do you think? Bearings? Lifters? I'd just like to eliminate somethings that often fail.
And don't go cheap. Bust out your big boy card and buy the ones that aren't 80¢/pack. It'll cost a whole $5 or so.
CF Veteran
Joined: Sep 2010
Posts: 12,692
Likes: 6
From: Mercer County, NJ
Year: 2001
Model: Cherokee
Engine: 4.0L I6 HO
damn clown, good way to be specific. Least they should know you talk from experience about it
Junior Member
Joined: May 2008
Posts: 15,016
Likes: 11
From: +34° 25' 35.67", -81° 21' 12.04"
Year: 1993
Engine: 4.0
CF Veteran
Joined: Apr 2011
Posts: 4,825
Likes: 2
From: Indianapolis
Year: '99 and '91
Model: Cherokee
3.73 is better lower gear helps move the tires easier (I'm assuming you're lifted with some bigger tires)
If its for the rear another option is to swap in am 8.8 they're pretty common with 3.73s but that involves welding o. New leaf perches and shock mounts.
If its for the rear another option is to swap in am 8.8 they're pretty common with 3.73s but that involves welding o. New leaf perches and shock mounts.
CF Veteran
Joined: Sep 2012
Posts: 1,289
Likes: 0
From: Springfield Virginia
Year: 1998
Model: Cherokee
Engine: 4.0
I'll definitely do push rods and lifters and valves etc if I've got enough, maybe bearings. Trying to keep the engine under $500 or so with the actual long block being $175 at the jy.
Completely forgot about those, what brand did you go with?




