98 Xj Engine Into A 2001 Xj

[sinkrun]

Does anyone know whats involved in putting a 98 4.0 engine in a 2001 xj. Whats the differances in electronics etc.

[Backdraft]

The 98 will have a distributor, the 01 will be coil on plug.

[terrawombat]

I did this exact swap on my '01XJ after spinning a rod bearing on the original engine. The swap is extremely easy IF you have an adapter plate to go from the larger intake/exhaust ports on the '98 engine to the smaller ports on the '01 two-piece cast manifold. Adapter plate can be seen here:

 

 

Pull the dizzy out of the hole and drop the camshaft position sensor...just make sure it's set correctly and isn't 180 degrees out like I did the first time around :yes:

 

Some of the '98 sensors may have different connector plugs, so you'll need to steal the sensors from the '01 engine.

[sinkrun]

IS the plate something you made or bought?

[dfreeman616]

there's a guy on naxja who sells them here's the page

http://naxja.org/forum/showthread.php?t=919384

and he provides his email

his email

wilsmick@gmail.com

if i don't make my own plate i'll be getting ahold of him shortly.

[sinkrun]

Thanks great info and after I read to the end there only 100.00 now instead of 150.00.

[terrawombat]

I bought mine from the previously mentioned seller.

[Sir Sam]

why is this needed? When I went the other way, 01 engine into a 96, I just bolted up the 96 intake to the 0331 head.

[terrawombat]

The exhaust ports on the 00-01 header are so much smaller than the non-0331 exhaust ports that it won't completely cover them up.

[Sir Sam]

ah, copy that.

[sinkrun]

Sorry to bring up a old thread however it took this long to blow the 2000 XJ engine. I found a decent 96 can the above procedures be used with the 96?

[dfreeman616]

yes 

[JeepcoMJ]

Thinking too hard.

 

If your 01 has split manifolds, but no pre-cat, swap to the 98 exhaust manifold and y-pipe, using the 01 o2 sensor. problem solved.

[randomguy310]

what do you do about the coil pack bolting on?

[sinkrun]

I used this guys idea, http://www.naxja.org/forum/showthread.php?t=937214 and I did put it in runs great mine did have pre cats so I just used the adapter.

[terrawombat]

I've gone over 60K miles in 4+ years without the coilpack bolted on.

[randomguy310]

ok, thanks