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Old 03-23-2016, 03:54 PM
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'98 4.0 into '00

I recently came into a 4.0 from a '98 tj and was wondering if i would have any problems putting it in my 2000 tj. I know the 98 block has a distributor and i think 2000 was the first year they went distributor-less. would this be a problem? Also as far as emission standards from what im reading about here in GA, the engine must be newer than the chasis in order to be legal, unless that engine can pass the emission standards for the year of the chassis. In that case you will be fine. So does anyone know if the two year difference would be a problem also? the '98 is basically just something to keep me drivable untill i can either completely rebuild my current one to stock specs or put a stroker kit in it. I have the 5 speed manual and A/C if that is necessary info. Thanks.

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Old 03-24-2016, 01:59 PM
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Old 03-28-2016, 04:23 PM   #3
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Old 03-28-2016, 05:55 PM   #4
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Issues are different motor mounts, no holes for coil rail (easy fix or easy work around) and exhaust and replace the 98 dist with the 2000 OPDA

You need the newer 200 exhaust to pass emissions but the 98 head has different exhaust ports so you need both gaskets and an adapter plate

Then use the 2000 intake on the 98 head a straight bolt on
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Old 03-28-2016, 10:06 PM   #5
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Would not a XJ 4.0 closer in year be a lot easier and more plentiful to harvest?
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Old 03-28-2016, 10:13 PM   #6
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Last XJ was 2001 and they are all old style 4.0 block and older style motor mounts

TJ 4.0 changed to new style block in 2000
All ZJ 4.0 are old style block
WJ that replaced ZJ in 99 are new style 4.0 block


The 2000 and 2001 use newer head and coil rail

But all the 2000 and 2001 4.0 plus the 1999 4.0 WJ are the crack prone crappy head design

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