Hydrolocked....new engine time - JeepForum.com
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > YJ Wrangler Technical Forum > Hydrolocked....new engine time

Baseline 4x4 Lifetime Warranty 4340 Chromoly Axle Shaft KiClayton Off Road WJ Long Arm Kits!Clayton Off Road - JK Prototype Gas Tank Skid

Unread 09-22-2004, 08:43 PM   #1
Registered User
1989 YJ Wrangler 
Join Date: Mar 2003
Location: Goffstown, NH
Posts: 234
Hydrolocked....new engine time

Well, after ripping apart my friends 1990 2.5L engine, I disocvered bent rods and valves, We are going to swap in a junkyard 2.5L into it, this should be an easy swap correct? it's the same motor and all so I just should be able to disconnect the dead engine and swap in the other one, hook it up and go ?

raZe is offline   Reply With Quote
Unread 09-23-2004, 06:41 AM   #2
Registered User
2004 WJ 
Join Date: Nov 2003
Location: Bellingham, MA
Posts: 1,706
I don't see why not.

Just make sure to get a motor with the same fuel injection system, as there were 2 different ones, I believe.
Jason T.
'99 GMC Suburban: Gas-guzzling people mover with 18" Z71 wheels
'04 WJ:Special Edition. V8, QTII, 2"BB, Bilsteins & 245/75/16" Goodyears
'02 WJ:4.7L, Selec-Trac. Totalled 9-12-07. Click to hearKolak 3" exhaust sound clip
JayJEEPguy is offline   Reply With Quote
Unread 09-23-2004, 07:45 AM   #3
Registered User
Join Date: Sep 2004
Location: Worcester, MA
Posts: 26
I think the 90 2.5 might be throttle body injection, but my 92 is a multi port injection.
[B]1992 Black YJ 2.5... !!!LT1 in the works!!![/B]
4" Skyjacker Softride Kit, Aussie Locker, No Swaybar, No Trackbars, 33 x 12.50 Mud King XT, 15x10 Cragar Soft 8, Bullet Pro Turbo Muffler and Magnaflow Mirror Finish High-Flow Cat, Optima Yellow-Top

[URL="http://www.cardomain.com/ride/242845/1"]My Page[/URL]
Bugga360 is offline   Reply With Quote
Unread 09-23-2004, 08:22 AM   #4
Why J?
Registered User
1993 YJ Wrangler 
Join Date: Sep 2004
Location: Knoxville Tn
Posts: 3,445
if yuou get an engine that in not an 89-90 you will have to switch over the intake manifold and valve cover and maybe the distributor. but the block and everything else should be the same.

wait i take that back you will also have to switch the sensors because after 91 they switch to a obdII system.
Why J? is offline   Reply With Quote
Unread 09-23-2004, 06:07 PM   #5
Registered User
1987 YJ Wrangler 
Join Date: Mar 2004
Location: Upstate NY
Posts: 2,342
I thought OBD-II didn't come 'til much later? Like mid-90s if YJs were equipped at all... I mean my YJ is carb'd so I'll admit I'm no expert on ECUs, but I thought that's what I heard.
'87 YJ Laredo - 4.0L, AX-15, NP231, 4.10s: 3.5" BDS, 31" Muds

'95 XJ - Donated drive train to the YJ, Parted out the rest

'51 CJ-3A - Buick 225 V6: Painless Wiring Harness, Warn Overdrive & Hubs, 2" Lift, 31" Muds
Tshark299 is offline   Reply With Quote
Unread 09-23-2004, 10:25 PM   #6
Registered User
Join Date: Mar 2002
Location: DFW
Posts: 38
OBD II is 96 and newer. make sure the 2.5L you get is 87-90 b/c they are TBI. 91-95 are MPI OBD I
92 Jeep YJ, 4 Banger, Cold air intake, Electric fan, 1 inch motor mount lift, 8.8 rear axle Limited Slip 4.10's, SOA, 2 inch body, 35x12.5 Pro Comp MT on 15x8 AR-767
Coot is offline   Reply With Quote
Thread Tools

Suggested Threads

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.