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My new 1989 jeep cherokee 4x4 4.0L HO

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Old 04-19-2010, 10:39 PM
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Default My new 1989 jeep cherokee 4x4 4.0L HO? (will find out)

I am quite excited I bought this for good price for the condition it is in compared to the others I have looked at.

Body has 220k miles
Engine has been rebuild and has 50k miles on it.
Transmission has been replaced.
New headliner
new battery
new alternator

Got it for 900.


Click to enlarge.



Only serious rust I have found on the cherokee.


Yes finally headliner (previous car did not have any.)




Can anyone tell me what this goes to? Image below.

Last edited by AndyADD; 04-19-2010 at 10:54 PM.
Old 04-19-2010, 10:47 PM
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Unless someone swapped the motor, its not a HO. They didnt go to HO till 91

Looks alot better than mine, I got it for 1200 with tons of rust, a knocking motor, and some other fun stuff..
Old 04-19-2010, 10:52 PM
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Originally Posted by Defiance665
Unless someone swapped the motor, its not a HO. They didnt go to HO till 91

Looks alot better than mine, I got it for 1200 with tons of rust, a knocking motor, and some other fun stuff..
Is there a way to find out if it is a HO? idk if it has been rebuild or a swapped rebuild one.
Old 04-19-2010, 11:25 PM
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What color is your valve cover?
Is it cast aluminum with 2 cast in ridges?
(Unless they changed it, of course.)

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Old 04-19-2010, 11:53 PM
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Here. I really need to learn more about the engines.

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Old 04-20-2010, 12:04 AM
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Thats a HO but they kept the closed cooling system.
Here is what a Renix Valve Cover looks like:
Old 04-20-2010, 12:06 AM
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Originally Posted by Defiance665
Thats a HO but they kept the closed cooling system.
Here is what a Renix Valve Cover looks like:
Awesome I have HO in a non HO year for the cherokee.
Old 04-20-2010, 12:12 AM
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Judging by the Valve Cover, oil fill cap, dipstick handle and some other stuff, im pretty sure its a HO. Dont quote me on it though, all that stuff can be put on an older motor (though I see no point).

Another way to tell, what way is your oil filter mounted? It is this way on a Renix:


but on a HO it is horizontal right above the starter.
Old 04-20-2010, 12:14 AM
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Originally Posted by Defiance665
Judging by the Valve Cover, oil fill cap, dipstick handle and some other stuff, im pretty sure its a HO. Dont quote me on it though, all that stuff can be put on an older motor (though I see no point).

Another way to tell, what way is your oil filter mounted? It is this way on a Renix:


but on a HO it is horizontal right above the starter.
Renix? I assume renix is non HO?

Edit: Where is the casting number on jeep cherokee so I can check that too?
Old 04-20-2010, 12:19 AM
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Renix is Pre-HO and also Pre-Chrysler. While AMC owned Jeep the computer system that controlled the injection was made by Renault/Bendix, therefore it is called "renix". Chrysler bought Jeep/AMC in 87 but didnt go to their own injection system "High Output" until 91.

Im pretty sure you have the HO engine, but they kept the Renix computer system. It would be too much work to change everything over for the Chrysler computer (full vehicle wiring harness needed).
Old 04-20-2010, 12:21 AM
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Originally Posted by Defiance665
Renix is Pre-HO and also Pre-Chrysler. While AMC owned Jeep the computer system that controlled the injection was made by Renault/Bendix, therefore it is called "renix". Chrysler bought Jeep/AMC in 87 but didnt go to their own injection system "High Output" until 91.

Im pretty sure you have the HO engine, but they kept the Renix computer system. It would be too much work to change everything over for the Chrysler computer (full vehicle wiring harness needed).
Ah nice.
Old 04-20-2010, 12:22 AM
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Want some more renix info?
Old 04-20-2010, 12:39 AM
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Originally Posted by Defiance665
Want some more renix info?
I dont want to waste your time do you have link about it?

Another question.. What fuse is recommended to hook cb radio (red wire) in the fuse box that will not drain my battery?
Old 04-20-2010, 12:55 AM
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Ill post something in a minute...

See the Single open spots that have the contacts in them? Some are hot all the time, others are ignition switched. Find the one you want and use a blade connector crimped onto the lead for an inline ATC Blade Fuse holder, use a 10A fuse in it. Run your line to the CB.

Fuse holder:

Last edited by 89Laredo; 10-19-2012 at 02:08 AM.
Old 04-20-2010, 01:15 AM
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Ah ok I mean the CB is wired for cigarette lighter but I rather hardwire it.


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