1988 4.0 and AW4 compatibility in 1993 XJ 4.0
#1
Junior Member
Thread Starter
Join Date: Jul 2016
Location: Snow Hill, NC
Posts: 63
Likes: 0
Received 3 Likes
on
2 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 HO
1988 4.0 and AW4 compatibility in 1993 XJ 4.0
My ‘93 4.0 HO drops oil pressure at hot idle. Gauge was reading 5-10 pounds. Confirmed gauge readings with mechanical gauge. Found an 88 Engine and AW4 assembly with 106k for $450. Would this be compatible in my ‘93? I appreciate it fellas
#2
CF Veteran
The 88 is the Renix era engine so the sensors are all different, but I believe you can swap everything from the 93 over to the 88 block. Are you swapping engines just because your oil pressure is low at idle? Do you have any other symptoms of the engine being bad?
#3
Junior Member
Thread Starter
Join Date: Jul 2016
Location: Snow Hill, NC
Posts: 63
Likes: 0
Received 3 Likes
on
2 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 HO
Slight backstory, when I bought my '93 the previous owner has busted the 6th cylinder piston, so my dad and I went to a junkyard pulled an engine out of an 01. Got home and found out the head was cracked. Fortunately, I had a head off an '89 and put everything together. The engine has never had good oil pressure. I don't necessarily think its a bad engine but it does drop at to 5-10 pounds at idle. Has about 35 pounds at 60 MPH. Also has upper engine noise. Instead of getting it rebuilt for $1750 I'd rather just buy another engine. Would the AW4 work? I know the splines are different but is it possible to swap?
#6
CF Veteran
Yes and you may have to use the 93 intake manifold and throttle body also. I am not very familiar with the 90 and older 4.0s.
Trending Topics
#8
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I have a writeup for swapping an HO motor into a Renix. You can use it as a guide going the other direction.
Here's a link: http://cruiser54.com/?p=100
#9
Junior Member
Thread Starter
Join Date: Jul 2016
Location: Snow Hill, NC
Posts: 63
Likes: 0
Received 3 Likes
on
2 Posts
Year: 1993
Model: Cherokee
Engine: 4.0 HO
Well my AW4 in my '93 has 290k on it and the guy Im buying the engine from is selling the assembly as a whole so technically no I don't need it but the AW4 I'm purchasing has a lot less miles
That link is much appreciated, thanks!
That link is much appreciated, thanks!
#10
::CF Moderator::
Join Date: Aug 2011
Location: Prescott, Az
Posts: 43,875
Received 1,526 Likes
on
1,238 Posts
Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
I wouldn't worry about your trans. Just use it and sell the other one that comes with the engine.
Thread
Thread Starter
Forum
Replies
Last Post
DESERTXJ206
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
29
07-21-2013 09:37 AM
H8PVMT
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
09-21-2010 02:01 PM
supersurfer92
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
4
08-03-2010 06:34 PM
Dsandine
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
01-13-2010 12:02 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)