What Engines Fit In A Jeep YJ?

by | Last updated on January 24, 2024

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What engines fit in a Jeep YJ? The YJ was released with two available engines; one being the

AMC 2.5L, four-cylinder with 105 hp

. This was AMC's newly designed and released , whereas they had used the GM 151 Iron Duke four-cylinder in previous Jeeps.

Can you put a V8 in a YJ?

One of the most enjoyable Jeeps to work with today is the Jeep YJ Wrangler, as built from 1987 to 1995.

The generous YJ engine bay allows for a comfortable, clean fit for GM Small Block V6, V8 and even Big Block V8 engines

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What is the best V8 engine to swap in a Jeep Wrangler?


HEMI V-8 Heaven

Those GM engines, old or new, are solid candidates for best Jeep V-8 engine swaps, but there are some that believe that any engine not from the Jeep “family,” which can include Dodge- and Ram-sourced power products, are the only preferred option, and therefore are the best Jeep V-8 engine swaps.

Can you put a LS motor in a Jeep Wrangler?


We offer a few different options for installing a GM LS based engine into your Jeep JK

. DIY: Do it yourself conversion components. You purchase the parts needed and do the swap in your garage at your own pace or until you run out of beer. The Second and more desirable option would be a GEN4 engine.

How much does it cost to LS swap a Jeep?

For a 500-hp fully tunable, complete swap kit—a DIY kit, mind you—you're looking at

damn near $23,000

. To have Bruiser or a similar facility do the conversion for you, obviously takes the price higher.


If you look at the AX15 and AX5 side by side you will see a huge difference

. The gears are larger, shafts are larger, bearings are larger, case is larger. It is the AX5 on steroids. If someone plans on modifying their Jeep and offroading it usually is not too big of a concern at first.

Straight-4 engine 2.5 L AMC straight-4 with MPFI Overview Manufacturer

American Motors

(1984-September 1987) Chrysler (September 1987-2002)
Also called PowerTech

I have a TJ top on my YJ.

It will work and seal well

, it just takes a fair bit of grinding due to the angle of the windshield. Just know up front grinding fiberglass kinda sucks. If you are willing to give it a go it can work just fine.

The AX5 is prevalent, but sadly it's strength is minimal, making it

a questionable off-road transmission

. Failures behind even stock engines are not uncommon.


SALE PRICE: $9,250

Our LS3 crate engine comes complete, from the Chevy SS-specific oil pan to the ignition system. It also includes the EFI intake manifold assembly with injectors and throttle body, exhaust manifolds, water pump, balancer, 58X reluctor wheel and 14-inch automatic-transmission flexplate.

It came with all the accessories and front drive. Not bad. The Dakota Customs swap kit for this engine includes mounts, wiring harness, programmed power control module (PCM), hoses, new air box, power steering fluid cooler, and washer fluid relocation bracket, and it usually costs

around $7,900

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  1. Find Reservoir – Locate the brake fluid reservoir and clean it.
  2. Check Level – Determine the brake fluid level.
  3. Add Fluid – Determine brake fluid type and add fluid properly.
  4. Replace Cap – Secure the brake fluid cap onto the reservoir.
  5. More Info. –
  • Chevy 4.3L V6, 425 lbs.
  • Chevy Small Block V8 (Gen. I & II), 550 lbs.
  • GM Gen. III V8 (iron block), 470 lbs.
  • GM Gen. III V8 (aluminum block), 407 lbs.
  • Buick 90 degree V6, 375 lbs.

The XJ was released with two available engines; one being the

AMC 2.5L, carbureted four-cylinder with 105 hp

. This was AMC's newly designed and released engine, whereas they had used the GM 151 Iron Duke four-cylinder in previous Jeeps. The second engine was the Chevrolet 2.8L V6, also carbureted and rated at 115 hp.

Willys-Overland modified the grille on its design to distinguish it from the nine-slot grille included on Ford's design. The new seven-slot grille was chosen

to avoid any conflicts over copyright going forward

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David Evans
Author
David Evans
David is a seasoned automotive enthusiast. He is a graduate of Mechanical Engineering and has a passion for all things related to cars and vehicles. With his extensive knowledge of cars and other vehicles, David is an authority in the industry.