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Topic Review (Newest First)
07-09-2007 05:02 PM
Originally Posted by HkdOnJP View Post
^ he's Right I was thinking cherokee
Yes you were.
07-09-2007 04:31 PM

^ he's Right I was thinking cherokee
07-06-2007 11:36 PM
jeeepguy All 4.0 engines in Wranglers are H.O. since first introduced in the '91 model year. Prior to that, the engine was a 4.2 and did not have the H.O. designation.

H.O. was a designator given by Jeep to denote the difference between a 4.2 engine and a 4.0 engine... nothing more.
07-05-2007 02:05 AM
GoHack If I recall right, it's the 4.0L, fuel injected, engine that is the HO.
07-02-2007 05:12 PM

4.0 from 92 and up are H.O. From 92 and lower they are just normal 4.0s
07-01-2007 03:33 PM
payj90 i do beleive all 4.0 are high output, i think they changed something in the head to make it 4.0. it is the same block as the 4.2. id say yes it is ho
07-01-2007 11:14 AM
George T. I have a 94 high output and it says it right on the back under the 4.0L badge... so i would say if it doesnt say it, it isnt. ::shrugs::
07-01-2007 04:49 AM
YJ 93 4.0L HO or non-HO ?


a friend has a 93 YJ 4.0L and wants to order some parts.
is it a HO or a non-HO? i think it must be a HO, am i right?

thanks for your help.

btw. like this looks an engione after it runs to long with too much water in the oil after driving through too deep water:

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