Skip the auto shop - Our mechanics make house calls

Q: Motor swap

asked by on

I have a 1999 parts jeep cherokee with a 4.0 l6 motor can i swap that into my 2000 jeep cherokee. Bc i noticed the motor i have in my 2000 now has a coil pack on the motor and the motor i want to put in it doesnt. Does that make a difference or will it fit right in ?
My car has an automatic transmission.

A: Hello. The coil pack is part of the ignitio...

Hello. The coil pack is part of the ignition system and is of little consequence to what motor it is used on. A long block, which consists of the head and engine block assembled, is very versatile in terms of the parts it can use. You may need to do some minor fabrication to make the coil pack work, but most likely it will bolt on easily. This depends on what motor was in the 2000 Jeep to begin with. If it was another 4.0l, things should go smoothly as far as the coil pack is concerned.

Jeeps are well known to be easy to swap engines in and out of. As for whether or not it will fit right in, that is really up to you to make that determination. Before you get too far, take time to examine the mounting points of both motors. The absolute best thing to do is to place both motors side by side and directly compare them. Sometimes, even with motors of the same year, make, and model, you will find differences. There is no way to be absolutely sure without a direct comparison.

In my experience, for the most part Jeeps are compatible year to year, but there are times when something strange will occur. This depends on what manufacturing plant the vehicle was assembled in and if it was meant for a market like California, which has its own set of requirements.

Long story short, there simply isn’t a substitution for a direct comparison and there is always a solution to water ever challenge you have. The real question with any modification is how much time, money and effort do you want to put into it. Every project like this for me is a learning experience that I can add to my tool belt of knowledge. I don’t go into them expecting things to just fall together. That rarely happens with most repairs. If you’re prepared to put in the time and effort, you can do it.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Idle issues

The idle air control valve should not be able to idle the engine more than about 3000 rpm. If the engine goes higher than that, you have a major vacuum leak or the throttle is stuck open for some reason....

Q: Radio Upgrade RA2 to RA4 how do I obtain UCONNECT access for APPS like Yelp?

Hello. In order to access the rest of the features you are looking for it is likely that you will have to download the smartphone app and provide a few details about the vehicle, as well as activate connection to...

Q: is it safe to change Transmission Fluid. Hasn't been changed in a long time. Currently the Transmission is working fine; no slip

I agree with the other mechanic. If the fluid looks dirty then this means the transmission was not serviced for a long time and if you service it then the new fluid will wash out all the clutch material that...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.