Jeep Wrangler TJ LS1 V8 swap part 1
The Novak Guide to Installing Chevrolet & GM Engines into the Jeep TJ & LJ Wranglers
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Those are the common denominators among Jeep owners who dream of slipping a healthy V-8 into the engine bay of their 4. Transplanting engines has been around since the dawn of powered vehicles, and when it comes Jeep Wrangler Tj V8 Conversion Kits ditching one engine for another in Jeeps, well, there are more combinations than there are trails to wheel.
It all depends on how deep one is willing to dig into those coin pockets, how much time one is willing to expend, and what resources are available to make the vision a reality. The later of those years are said to make about rear-wheel horsepower and somewhere in the neighborhood of hp at the flywheel.
That vintage LS1 also used a high-volume version of the mass airflow MAF sensor that allows the Powertrain Control Module to increase intake volume and adjust to a wider range of air link. The engine checked in excellent condition, saving us serious coin by not having to do a complete rebuild.
Salvage yards remove engines in the fastest, easiest way possible and seldom, if ever, take time to unplug wiring harnesses.
They cut them off and yank the engine. It offers the laptop-programmable ECU, with all the sensor plugs, power, and ground leads neatly labeled, as well as a detailed instruction manual and software to run on a laptop.
It is seldom a good idea to allow the driveshafts to make the decisions as to where the powertrain will be placed. The former consists of burning and reburning the fuel and air to the cleanest state possible, and then reburning yet again through the catalytic converter in the exhaust circuit. They cut them off and yank the engine. We'll help you rule out two extremes.
Everything is there to easily make the early LS1s those using a tooth crank sensor run perfectly happy in here TJ. Cooling Concerns Another hurdle to get over with V-8 transplants is keeping an LS1 cool while working it hard at slow speeds. Flex-a-lite also offers a direct-fit TJ oil cooler kit as an option, which we chose for this transplant.
The TransLife kit includes a six-pass transmission cooler and the brackets necessary to easily install the cooler directly to the vehicle. Using an auxiliary transmission cooler brings the cooling outside of the radiator side tank for better cooling.
Old-School You could use the electronically controlled automatic 4L60E that came in the donor car if you really want a juice tranny. However, to keep costs down and reduce any electrical-related transmission issues on the trail, we opted to go old-school with a GM TH This gear-driven two-speed unit, Jeep Wrangler Tj V8 Conversion Kits built inis legendary for its strength and performance. Hard-core rockcrawlers and 4x4 racers with high-horsepower rigs worldwide sing its praises and count on it to pull them through the worst conditions.
It has the option of five gear ratios from 2. It allows you to shift into front-wheel-drive low-range, which can be beneficial in really tight off-road maneuvering situations and in snow. In this first of a two-part story, we focused on the finer aspects of removing the old Jeep 4.
Part click at this page will cover engine wiring and programing, gauges, driveshafts, and the exhaust system so we can fire up the LS1 and take our TJ for a test drive.
Eric Dunks helps snake the 4. None of the Jeep 4. Jeep Wrangler Tj V8 Conversion Kits our TJ had seen a lot of front frame and suspension mods, the engine bay had been left untouched, so Eric gave it a good pressure washing before starting the swap.
The rainbow is a good omen. Advance Adapters makes mating an LS1 inside a Jeep TJ engine compartment easy with these custom-fabricated engine mounts. These are a must for such a conversion. The LS1 V-8 is pounds lighter than the 4.
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This Holley LS1 Retro-fit oil pan is designed to provide more clearance at the front half of the oil pan and works great with the TJ chassis. The pan is baffled so it keeps the oil where it needs to be on steep off-road angles. Eric freshened it up with the bare essentials: Cooling is critical in any Jeep V-8 swap.
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The Flex-a-lite kit is designed specifically for this application. We spared no expense on the new Advance Adapters transfer case. This Atlas 2 was custom-built to our needs with a 3. Kit is plug-and-play with its own CPU and easy-to-follow detailed instructions. Make sure your used LS1 comes with all of the sensors, including idle air control and throttle position TP sensors on the throttle body shownthe knock sensors under the intake manifoldand the pigtails, along with the coil packs and throttle body sensors shown.
Always make sure the LS1 you are buying has the Cam sensor, located on the block directly above the flywheel, the manifold absolute pressure MAP sensor on the intake and the aforementioned knock and TP sensors.
There is no way around the conclusion that fuel injection systems do this better and in a broader range of conditions. Casey used his favorite adjustment tool to flatten a body seam that is too close to the TH case. The Turbo R4 transmission has taken the conversion world by storm and is a good option for the same reasons as the TH, with advantages in having both a lower first gear and a.
LS1s built after that time used a tooth pick-up wheel, and the sensors are grey. The ears will have to be trimmed back. Clearance issues between the LS1 exhaust manifold outlet and TH housing is easily solved with a Sawzall. The cutting of the wings leave plenty of room to bolt on a custom exhaust system when the LS1 is in its new home.
Installing Chevrolet & GM Engines
We took the engine in and out three times during the transplant process to make sure fitment and clearance issues were cleanly and efficiently addressed. Our engine frame mounts are tack-welded in place until the final fitment of the engine. That takes place after the transmission and transfer case are in proper position later in the swap process.
Casey used his favorite adjustment tool to flatten a more info seam that is too close to the TH case. The LS1 fit is tight, but with a small adjustment made to the body seam between the Jeep Wrangler Tj V8 Conversion Kits and firewall, it parks in the TJ just fine. After any firewall clearance issues are handled and the engine frame mounts are in position, we spent a couple hours cleaning and painting the engine compartment.
We like things to look nice and neat. Adapters bolted on, sensors installed, and the trans and transfer case ready for their new home, Eric bolts on the last of the LS1 parts that are best installed outside of the TJ. The accessory drive kit provides maximum space between the engine and the radiator. Now that the engine is in its final resting location, we installed the Flex-a-lite radiator assembly.
It works slick with the CTS-V accessory drive, providing just the right amount of fan-to-engine clearance. The Atlas 2 shift linkages can be adjusted and modified to fit just about any location. Casey cut the brass center bushing that holds the shift levers in half. Doing so brought the twin sticks in proper alignment click to see more the stock TJ center console, making the install look factory when our LS1 swap is finished.
The size and configuration of the Atlas 2 requires a 2-inch Jeep Wrangler Tj V8 Conversion Kits lift and 4-inch suspension lift, which our host TJ, a dedicated rockcrawler, already had in place before starting the V-8 swap.
A little hydraulic scissor lift table is a godsend when doing this type of work. The engine is in. The radiator is in.
The transmission and transfer case are in. Subscribe to a magazine. Home How To Engine. Part 1 Posted in How To: Engine on July 10, Share this. Subscribe to the Magazine. Get Digital Get Print.