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Installing Chevrolet and GM Engines into the Jeep CJ5 & CJ7, 1976 to 1979
These Jeeps are fantastic platforms for a GM engine conversion. In 1976 there were some additional changes in CJ5 models, not to mention the introduction of the illustrious CJ7.
The frame was changed to non-parallel side rails. Between the frame sides in the engine mounting area, the width was reduced 5/8" from earlier models. The engines in these Jeeps are mounted 1-1/4" offset towards the driver and are not normally moved to center for a Chevy V8 swap.
Because these Jeeps had a V8 option, they are simple to convert to Chevy V8 power. We advise the use of strong V6's or better in these vehicles due to the greater weight and higher gearing of these Jeeps. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04
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Installing Chevrolet and GM Engines into the Jeep CJ5, 1972-1975
Starting with the 1972 model year, the CJ5 had many major changes. The wheelbase was lengthened to 84", tread width increased, GM Saginaw steering (manual or power), bigger brakes and many other changes were introduced. The things most relevant to an engine swap were the longer engine compartment for the six-cylinder, and the indroduction of the Spicer Model 20 transfer case (a first for short-wheelbase Jeeps) with the "centered" model 44 rear end. Because these 1972-75 Jeeps had a V8 option, they are simple to convert to Chevy V8 power. We advise the use of strong V6's or greater in these vehicles due to the greater weight and higher gearing of these Jeeps. If the Jeep engine was a six-cylinder and the Chevy is going in with the original Jeep transmission , the radiator will have to be moved back to accommodate the shorter V8 engine. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04
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Installing Chevrolet Engines into the Jeep Full-Size "J" Series Jeeps & Wagons, 1962-1991
These are probably the simplest of all the Jeep conversions. The large amount of room under the hood plus the fact they sometimes used a hydraulic clutch and cable type throttle linkage greatly simplifies the conversion procedure. A 307 or larger c.i.d. Chevy V8 is recommended because of the weight of these vehicles. Six-cylinder engine swaps show little, if any, improvement in performance or mileage.
The Full Size "J" Jeep line had what is believed to be the longest American vehicle production run without major change in history, and of course, why change a wonderful thing? As such, these directions apply to the full production run from 1962-1991. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04
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Installing Chevy and Buick Engines in the Jeep Utility Trucks & Wagons, 1947-1964
Jeeps in this category are easy to convert to GM V8 power. These will always have a T90 four-speed transmission. There were also some optional T98 four-speeds in the 1955-1964 models.
We get inquiries about putting straight 6's in these vehicles, but usually advise against it due to the close fit caused by the short distance between the firewall and the front cross member Also the Chevy 6's are 230-250 c.i.d. and really don't have enough low end torque for these heavier vehicles. The same is true for V6's. The short stroke V6's don't work all that well in this vehicle. Some of our customers insist on a 6 or V6 only to find out mileage and performance are poor.
A small block Chevy V8 will give respectable performance and better mileage than any straight-six and some V6's and the V8 is easier to install than the straight-six. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04
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Installing Ford Small Block Engines in the 1987-1995 Jeep YJ Wrangler
The YJ underwent many significant changes from its CJ predecessor. The legally embattled AMC, having been grilled for the hyped rollover risks of the CJ, specified a wider track. This entailed a wider frame and a somewhat refined suspension. The Ford Small Block is a prime engine for a swap into the YJ Jeep Wranger. This is especially true for the 5.0 injected versions. Read on for the details. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04
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Installing Ford Small Block Engines in the Jeep CJ5 & CJ7, 1980 to 1986
The last era of the CJs saw the introduction of the Model 300 transfer case. This was the final and arguably the best of all the Jeep transfer cases. Production of the 258 straight-six continued. Two four-cylinder engines found their way into the CJs starting with the GM 151 c.i. Iron Duke until 1983. From 1984 ‘til 1986, it was supplanted by the AMC 150 c.i. which, in different tune, is in production to this day. It is closely related to the 258 and now the 4.0L. The engines in these Jeeps are mounted 1-1/4" offset towards the driver and are not normally moved to center for a Ford V8 swap. Use our #MM30 side mounts for these Jeeps.
Because these Jeeps had a V8 option, they are simple to convert to Ford V8 power. Using the proper adapter and our #30 universal side mounts, along with a rear cross member mount, will get the Ford engine in place. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04
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Installing Ford Small Block Engines in the Jeep CJ5 1972-1975
Starting with the 1972 model year, the CJ5 had many major changes. The wheelbase was lengthened to 84", tread width increased, GM Saginaw steering (manual or power), bigger brakes and many other changes were introduced. The things most relevant to an engine swap were the longer engine compartment for the six-cylinder, and the indroduction of the Spicer Model 20 transfer case (a first for short-wheelbase Jeeps) with the "centered" model 44 rear end.
Because these 1972-75 Jeeps had a V8 option, they are simple to convert to Ford V8 power. The Ford Small block fits very well into these Jeeps due to the longer hood section, introduced by AMC this year to accomdate the I6 and V8 engines. As such, cross member modification, etc. are not required on these swaps. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04 Edited
08/02/04
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Installing Ford Small Block Engines into Jeep CJ5 & CJ7 1976 to 1979
In 1976 there were some additional changes in CJ5 models, not to mention the introduction of the illustrious CJ7.
The frame was changed to non-parallel side rails. Between the frame sides in the engine mounting area, the width was reduced 5/8" from earlier models. The engines in these Jeeps are mounted 1-1/4" offset towards the driver and are not normally moved to center for a Ford V8 swap. Use our #MM30 side mounts for these Jeeps.
Because these Jeeps had a V8 option, they are simple to convert to Ford V8 power. Using the proper adapter and our #30 universal side mounts, along with a rear cross member mount, will get the Ford engine in place. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04 Edited
08/02/04
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Installing GM Engines into the Jeep CJ3B
These are a cross between a CJ3A and CJ5. They were made from 1953-64. The front crossmember modifications required for the CJ3A will be required for the CJ3B when installing a Chevy V8. This is not required for a V6 installation. While all CJ3B's look alike, there are many differences in them, depending on when they were made—early models had CJ3A running gear, later models had CJ5 running gear. Early CJ3B's were 6 volt electrical, later models were 12 volt. Generally, a V6 is a much better fit than the Small Block V8. Consider the Buick or Chevy V6's for a sensible, sanitary, powerful and non-invasive swap. However, the following information will apply to Chevy and Buick swaps of either variety. Iron Duke four-cylinders are also an option in these Jeeps, as they use a Small Block style bellhousings and therefore, the same adapter assembly. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04
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Installing GM Engines into the Jeep YJ Wrangler, 1987-1995
As for powertrain, the YJ had three different engine options. The first six cylinder engine avalable for the YJ was the AMC 258 I6. It remained carbureted until 1991, when the 4.0 was introduced. This revised version of the 258 was a needed improvement. Further improvements would follow, though the motor never really acheived the refinement, efficiency or weight reduction to really light up the Wrangler's performance.
The AMC 2.5L four-cylinder was also available. This engine, carried from the AMC line since 1983, was a respectable powerplant. It also underwent the improvements seen by much of the industry. Domain: http://www.novak-adapt.com
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Submitted by Code3TJ on 08/02/04
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Jeep Cherokee Oil Temperature Gauge
Summer temperatures in Saudi Arabia can reach 50*C or 120*F. An early warning of oil overheating can save your engine from serious wear. The Jeep Cherokee 4.0 does not have an engine oil temperature gauge from the factory.
I installed an Autometer Sport Comp 2-1/6" electic oil temperature gauge (140-300*F #ATM-3348) in the space to the right of the instrument panel. It fits there very nicely (see photo below) and has a factory look. Domain: http://www.angelfire.com
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Submitted by Code3TJ on 09/02/04
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Jeep Cherokee XJ Cooling System Upgrade
This write-up will describe how to upgrade a Jeep Cherokee XJ cooling system with the installation of a new radiator, TurboCity hi-flow thermostat and housing and a transmission cooler. Domain: http://jeephorizons.com
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Submitted by Code3TJ on 12/03/04
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Jeep Computer codes (OBDI & OBDII)
OBDI and OBDII Computer Codes and how to obtain them without a code reader Domain: http://jeephorizons.com
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Submitted by thephantum on 09/24/04 Edited
09/24/04
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Jeep Engines
Jeep engine information covering upgrades, factory options, and essential information. These articles were originally written to cover only engines Used in CJs, YJs, TJs, and their military brethren. Articles are being added to cover engines used in other models. Domain: http://www.jeeptech.com
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Submitted by Code3TJ on 09/09/04
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