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post #1 of (permalink) Old 05-12-2001, 06:24 PM Thread Starter
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90 YJ Engine

Is the 1990 YJ 6 cylinder engine a 4.2L engine?

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post #2 of (permalink) Old 05-12-2001, 06:39 PM
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Re: 90 YJ Engine



[b]Boston Mangler
89 YJ With A Bunch Of Goodies
See It At:
post #3 of (permalink) Old 05-12-2001, 06:47 PM
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Re: 90 YJ Engine

I've noticed you asking a lot of questions about different years, so I hope this helps the search for the "perfect" Jeep.

Yes it is. The 4.0 came out for the '91 model year.
87 - 95: 2.5l inline 4 w/ fuel injection
87 - 90: 4.2l inline 6 w/ BBD carberator
91 - 95: 4.0l inline 6 w/ fuel injection

87 - 91: old style roll bar w/45* down bars
92 - 95: new style roll bar w/full hoop rear bars

Not many other notable differences other than the larger knuckle U-joints on the front axle in '95 and the '87 had an NP208 transfer case and all others had an NP231.

The side mirrors were different in 87-88 and for these two years, the Peugot 5-speed tranny was used which doesn't have a very good rep

'88 Sahara, 4.2, auto, 4.0 head swap (finally), no trac bars.
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