Fairly handy, but never done an engine swap before. I’ve found a 98 4.0 to drop into my ‘91 XJ (Engine threw a rod). Is this going to take a lot of “modification” or is it relatively straightforward? Would I be better off finding an engine closer to the original year?
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‘98 4.0 into a ‘91 Cherokee
- Thread starter wb0rur
- Start date
Green Mesa XJ
NAXJA Forum User
- Location
- Pensacola, FL
98 XJ? You’re good to go, only modification I can think of is the temp sender on the cylinder head, oil filter adapter.
Different casting for the cylinder head but the basics are the same, just treat it like a long block and swap you sensors and accessories over.
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Different casting for the cylinder head but the basics are the same, just treat it like a long block and swap you sensors and accessories over.
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Green Mesa XJ
NAXJA Forum User
- Location
- Pensacola, FL
Use your original set up for the simplest swap. Motor is the managed the same by the 91’s ecu. I think even the 98 distributor plugs in to the 91 harness. Just swap all the 91 sensors over, either drill and tap the temp sensor on the head if there’s no place for it or relocate it.
You could upgrade to 98 electronics but you’d have to go all the way dash & everything. Probable not worth it to get OBDII.
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You could upgrade to 98 electronics but you’d have to go all the way dash & everything. Probable not worth it to get OBDII.
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- Location
- Minneapolis, MN
Any 1990-2001 XJ Cherokee or 1993-98 ZJ Grand Cherokee 4.0L engine block will interchange.
Remove and re-use as needed or required from your original engine: Intake/Exhaust manifolds, flex plate/flywheel, cylinder head, distributor-less ignition or distributor assembly, engine sensors, motor mounts, fan belt driven accessories and/or mounting brackets.
Remove and re-use as needed or required from your original engine: Intake/Exhaust manifolds, flex plate/flywheel, cylinder head, distributor-less ignition or distributor assembly, engine sensors, motor mounts, fan belt driven accessories and/or mounting brackets.
alexgalexg
NAXJA Forum User
- Location
- Connecticut
Easiest way is to use your original intake since the mounting for power steering is different. Don't break any sensors you'll need your originals the 98 ones likely won't plug in
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Hey gents, new to the Jeep world. Just bought my first, I got a 2001 XJ Sport 4door. I was looking to change out all the suspension for fresh new stuff so I ordered new stock CrownAutomotive front coils and rear leafs, and 4 stock shock absorbers from Quadratec. But now I’m thinking I should have went with the Heavy Duty springs. I’m looking to have a very slight lift from stock height. Does anyone have any real personal experience with the CrownAutomotive HD springs that can tell me how much lift it gives? And what the ride quality is like? THANKS in advance guys!
