Scraping my 91 HO engine
06-26-2012, 04:18 PM
#1
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Year: 1991
Model: Cherokee
Scraping my 91 HO engine
Does anbody know if I will lose power by putting a engine from a 89 into my 91? My 91 originally had the 4.0 High output but the 89 motor has way lower mileage but am I going to regret this???
06-26-2012, 05:11 PM
#2
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Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
The non HO engine has about 20hp less and there are some differences with the cylinder head and injection system.
06-26-2012, 05:34 PM
#3
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Year: 1990
Model: Cherokee
Engine: 4.0l 6Cyl
As far as I know a lot of stuff is needed for the change, a lot of the sensors are different, throttlebody is also different and the throttle cables connect differently.
06-26-2012, 05:37 PM
#4
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Year: 1989
Model: Cherokee
Engine: 4.0
06-26-2012, 06:03 PM
#5
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Year: 1987
Model: Cherokee
Engine: 4.0 (of course) ;)
You could just take the 89 block and plug in all your 91 accessories. Everything that makes a jeep engine "HO" is external, nothing really about the block and internals are different if I'm not mistaken
06-26-2012, 06:15 PM
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Year: 1987
Model: Wagoneer
Engine: Renix 4.0
x2. Only differences i know of is the head, intake (everything on the intake) etc. And of course the accessories
06-27-2012, 05:39 PM
#7
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Put the Renix engine in as a long block. Use your dizzy, flywheel/flexplate, manifolds, thermostat housing, valve cover if it's different, and use the intake gasket for your 91.
You will have no regrets. Any questions, post them up.
Ain't no stinkin' 20 horsepower difference......
HO stands for Highly Overrated BTW.
You will have no regrets. Any questions, post them up.
Ain't no stinkin' 20 horsepower difference......
HO stands for Highly Overrated BTW.
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06-27-2012, 06:20 PM
#8
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Year: 1989
Model: Cherokee
Engine: 4.0
Put the Renix engine in as a long block. Use your dizzy, flywheel/flexplate, manifolds, thermostat housing, valve cover if it's different, and use the intake gasket for your 91.
You will have no regrets. Any questions, post them up.
Ain't no stinkin' 20 horsepower difference......
HO stands for Highly Overrated BTW.
You will have no regrets. Any questions, post them up.
Ain't no stinkin' 20 horsepower difference......
HO stands for Highly Overrated BTW.
06-27-2012, 07:40 PM
#9
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
06-27-2012, 08:24 PM
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Year: 1989
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Engine: 4.0
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