If one compares the differences between the renix and ho throttle bodies also called tb, we might notice several things. The system improved the drivability of the jeep cherokee and comanche over carbureted models. First, the renix tb has a 52mm bore with a rather blended entry angle and no wall taper. Also had to reroute the renix fuel lines to get them in the right locations for the ho fuel rail. Bought this for a jeep cherokee with the renix motor which has a different style throttle body. Home products jeep cherokee jeep cherokee xj 9101 cherokee 4. The jeep cherokee xj is one of the bestselling vehicles jeep has ever produced. After having doing this swap, all i can say is this is one of the best things i have done to my jeep. We wouldnt recommend buying a fourcylinder xj unless you have plans for an engine swap.
Ran into a neighbor on another forum and i decided to spread this to the other jeep for. Renix renix electronique was a joint venture by renault and bendix that designed and manufactured automobile electronic ignitions, fuel injection systems, electronic automatic transmission controls, and various engine sensors. The renix tps for aw4 is a double tps, two connectors one 05v for the engine ecu, the other 50v for the aw4 tcu. As more and more power enhancements are making their way into the jeep 4. Jeep cherokee sport jeep grand cherokee laredo 2001 jeep cherokee jeep zj jeep xj mods jeep wrangler yj jeep wrangler unlimited jeep wheels jeep patriot what others are saying engine bay schematic showing major electrical ground points for jeep cherokee engines. Ev6 multi hole injectors are better alternative than the above mentioned ford ev1. Another benifit of the partssharing design of the two engines it the ability to steal a head and efi off a 4. High output models are the most desirable but i wouldnt pass on a renix at a good price.
Some people say the 0331 isnt as bad as people say. Limicar cylinder full head gasket set head bolts for 19992001 jeep cherokee 19992003 jeep grand cherokee 4. So unless her engine is really tired, its not worth the hassle of swapping the electronics. I was swapping the head trying to solve some overheating issues. Heres the comprehensive list of what motors will fit which jeeps. So we found it interesting that later on mopar introduced a ho performance cams and. After rebuilding the carb, the jeep was still a pita to get idling correctly let alone drivable. The ho intakeexhaust will only work for the ho head.
I recently threw a rod and destroyed the bottom end of my 4. They mention a lot of improvements, longer valve stems, longer guides, polished valves, changed the ports a bit, and thick face, but im wondering if theres any real world improvement to be had over the stock 4. This page contains information courtesy of eric giordano jabathahut. We scrap jeeps, more than likely if we get a 0331 head jeep in the head is cracked, well over half the high mileage 0001 ones we get in have this problem. I just did the ho head and intakeexhaust swap and its pretty straight forward.
I was going to use a 1989 renix block i had laying around with a 12 counter weight forged crank from a 1976 258. Ive digged around regarding renix ho earlier, and found the following sentence a good explanation. Joe attardos ho tb to renix intake manifold conversion article explains how it. See more ideas about jeep cherokee xj, jeep cherokee and jeep. All around performance gains, over the 258 of course, although i do miss the lower end torque that the 258 had.
The top 5 modifications for your jeep cherokee that you. These are used on jeep comanchees, the dodge dakota and durango, fords ranger, and the chevy s10. The tbody bore is the one of the biggest differences in the renix and h. When the ho was first introduced in the summer of 2001, dc service training literature featured statements and warnings that the upgraded parts used on the ho engine were not interchangeable with the standard 4. There are also some other differences with swapping ho motors into renix jeeps and the other way around, most. Just a little heads up, the laredo and limited are two different grand cherokees. I started by trading my racing seats for a rebuilt cylinder head from a 94 cherokee that came with a 99 intake manifold, was told they flow better and fit just the same, exhaust headers and a. Test fuel pressure at the fuel rail with a fuel pressure gauge regardless of new pumpfilter 3.
Some brave souls even drill and tap the ho head at the rear for the sender. Swap all the renix sensors to the ho engine, get an ho headpipe, eliminate the egr could be a problem if they check emissions in your area, swap the mopar alternator for the renixs gm alternator, and you are pretty much there. Promaxx performance oereplacement jeep inline cylinder. From 1991 on up is the highoutput ho version of the 4. Head to a scrap yard and see what you can muster up. Also plan on concerting to the 2000 open cooling system probably at the same time as well. I see an ad in a recent print magazine from edelbrock, announcing their 4. O2, tps, map, cts, mat, cps, and the renix has a knock sensor too. Performance black exhaust headers manifold system kit for 8790 jeep. Unanswered questions what are the theme in the poem epitaph for a monster of our times by david malouf. Basic diagnostics for jeep cherokees with renix nonho engines. Any sensors i will not be able to swap between the two heads. Each kit is hand made right here in nampa, idkit includes 6 main wire upgrades for your needs.
Hackingtuning the jeep ecm archive gearhead efi forums. Id like to do a swap at somepoint with the 2000 ho motor but retain the renix head if possible and use all the other necessary renix accessories with the ho thermostat, etc. Oct 07, 20 installing a 93 high output head on a 90 cherokee renix block send your jeep projects to project shop. Block, 53020569, 9699, ho, late, best for pre2000 jeeps. Jeep cherokee xj the xj series jeep cherokee was a compact unibody suv. Developed and designed from oe castings, these iron heads feature hardened valve seats and heavierthanstock castings to resist cracking and warping.
I just got a brand new aftermarket head from a buddy for installing his lift. Fuel injection will add driveability and reliability on the trails especially. One of the most fascinating powertrain conversion platforms among the jeeps are those into the jeep xj cherokee. Test and adjust your throttle position sensor your vintage is adjustable 4. This is what i think i know so if you have actually completed the swap, can you please give me some backup. This version had revised electronics that are much easier to diagnose and a bump in power. I noticed some things arent hooked up, and other lead nowhere. Since the intake ports of the ho are slightly different, you use a new renix gasket. The top 5 modifications for your jeep cherokee that you should. To all you wanting add this to your cj head swap project. This issue we are going to take a look at the cylinder heads for the 4. Try east coast auto source for some excellent prices on jeep.
The 97 would be an 0630 casting and the 02 is a tupy head. Installation on my jeep required torxstar bits to remove the old air tube. Therefore, i would have a ho block and head, reusing my renix fuel enjection. Dec 22, 2017 a timelapse of pretty well the entire head replacement for an 89 cherokee with the 4. I already know the cams and intake are because i have them on my standard 4. So if i do the gasket i should be good awhile but who knows.
Just an fyi, depending on the year renix systems were rated up to 175 hp. I have done some work on the renix jeep ecu for the 4. When i scrolled to the bottom of the jeep cherokee online manual and hit 1997, the page had the same index the wiring diagram is under the 19841991 heading. I swear the jeep engineers had this head swap in mind when they designed the 4. Jeep cherokee engines renix nonho engine sensor diagnostics. You will use the ho throttle body and iac sensor but will have to make an adapter to use the renix tps on the newer throttle body. You should be able to find plenty of these puppies around. This page contains an easy to follow set of diagnostics for your early model 4. The jeep cherokee xj is a compact sport utility vehicle manufactured and marketed across a.
I have a 95 cherokee and i was wonder will the motor from a 2001 grand cherokee of into my 95. This is one of the tougher and more complex tbodies to work on, and absolute pain. Even though your 1999 cherokee doesent have the high output badge it still is a ho 4. Head gasket thickness seems like one easy way to adjust compression ratio. The only thing i would recommend is to make sure that if you run an elbow off this to make sure it is very low profile to clear the hood as space is tight. The main difference between the two is the head flow characteristics. The ho block will have a plug in the coolant galley on the drivers side of the block, closest to the. Picked up an 89 mj that when i start it up, almost emediatly smoke starts rolling out of the crank case vent on the valvecover. I havent had any trouble related to the head and i used 4. The 90 cherokee head will either be an ho with the mopar mpi casting number 7120 or it will be the head that came with the renix fuel injection system.
The 8790 engines had renix electronic multipoint fuel injection, electronic ignition, a single 51mm 2. Throttle body swap for renix 70mm jeep cherokee talk. The 0001 was an 0331 casting and had cracking issues. When i moved the red wire to the vma hole and put both prongs on battery terminals, it displayed more than 19 volts. The ports in the head for the intakeexhaust are bigger and flow more freely, along with a change in camshafts and the deletion. Come join the north american grand cherokee association and participate in discussions about performance, modifications, classifieds, off roading, trail reports, troubleshooting, maintenance, and more. A very complex computer program will shift this thing better than you ever. In this video ill modify the renix intake at the throttle body on my 1990 jeep cherokee xj in preparation for a cowl snorkel. I was saving up parts to do a low budget stroker build at one time. Edelbrock performer cylinder head for jeep inline six jeep rubicon, jeep xj, inline. The intake runners had a more straight shot into the cylinders in the ho as compared to the 90. I look over the armor and go over what comes with it out of the box and woe they mount to the jee. January 2010 in jeep i am buying a 1990 jeep cherokee loredo and it needs an engine. I am getting ready to do a head swap from a 0331 to 7120.
It runs good as well, didnt notice any coolant in oil until a week or two of driving it. There are also some other differences with swapping ho motors into renix jeeps and the other way around, most of it is gasket related and easily remedied. A forum community dedicated to jeep grand cherokee owners and enthusiasts. If you want to use the ho exhaust manifold, you must go with an ho headpipe and. Jeep cherokee with a 1uzfe february 2, 2016 by swaptastic 2 comments after slowly building this 1996 cherokee xj over several years the owner decided to swap out the tired factory 4. Test your ignition coil and ignition control module here is a link to testing on the renix 4.
When i got it, it definitely wasnt a ho version, and i saw on the block it was an 89. If you keep the renix tps and use both outputs to feed pcm and tcu it should work or get a later tcu and keep the ho tps, but you would need also the later transmission harness because the pin arrangement is different. Swapping to the ho head wont make it a ho engine though. Swap all the renix sensors to the ho engine, get an ho headpipe, eliminate the egr could be a problem if they check emissions in your area, swap the mopar alternator for the renix s gm alternator, and you are pretty much there. Knowing that the 60mm renix plenum is the same as the ho, i look up what options do i have to match my old renix to a ho. Unlike some that only sell you 3 wires for your battery, alternator, and main ground, our kit does a complete upgrade over your factory wiring. Major applications included various renault and volvo vehicles. Oct 26, 2007 another benifit of the partssharing design of the two engines it the ability to steal a head and efi off a 4. Conversely, the ho motor utilizes a 60mm bore that tapers down to approximately 55mm. I was able to hear the grand cherokee turn on, it came from a jeep. I dont know the hp and torque numbers, but there were significant changes to the head that accounted for most of the performance. The new ho engine replaced the older 177 hp version of the 4. Oiljeep parts zj seat swap into xjbolt in jeep zj, jeep xj mods, jeep.
This information was provided by jabathahut and was also posted on jeeps unlimited. Injection performance kit fipk is now available for jeep cherokee 4. Mar 01, 2009 read about this jeep cherokee custom fabrication and factorylike conversion of a 2. The ho block will have a plug in the coolant galley on the drivers. I just adapted the renix throttle body to the intake and swapped in renix sensors. The jeep tbi from the renix engines87xjtill they went mpfi isnt suggested to use because it is harder to adapt for minor gains. Truck runs good other then an exaust leak and high idle when first started up. There are four of them and you really cannot swap them around, so you had better. In this video i look at ares fab xj 14 panel armor that includes tail light boxes and a rub rail. Keep the main leaf from your cherokee, but dont be afraid to throw the rest of it out. You will be using the intake and exhaust manifolds from your renix, along with all your sensors and wiring. I have a question on what parts are swappable form ho to non ho. Had to adapt the renix fuel rail to the 99 intake though. It shared the name of the fullsize sj model, but set the stage for the modern suv, being a cross between a station wagon and truck with little pickup truck heritage.
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