Mechanics

ENGINE SWAP PROCEEDURES

1998 Mitsubishi Montero • 6 cylinder 4WD Automatic • 175,000 miles

I will be doing an engine swap on a Montero shortly and I have a few questions. I am fairly mechanically inclined (a few Honda & Subaru engine swaps as well as headgaskets under my belt) but I cannot seem to find a guide on the internet of how to go about swapping one of these engines out.

1. Should I leave the transmission attached to the engine when pulling the engine? What would be easiest? I will have access to an engine hoist, jackstands, and a floor jack. No air tools however.

2. Easier to pull the engine from the top or bottom? If I come out through the top do I need to pull the radiator or A/C condenser?

3. I know there are always small little things about swaps that are a bit tricky, any special bolts/locations/linkages commonly screwed up tidbits that I should be aware of? Or steps that would make pulling or removing the engine easier?

4. I don't know if the Montero I am getting is a sport or not but it is my understanding that there is a difference between the two engines. Does it matter if the engine I get is a sport or not? I know that one engine is bigger then the other but pertaining to mounts/wiring are they the same?

5. I cant think of anything else. If you know if some links that I could look up that would be great. I would like steer away from buying a manual as I have found first hand experience is much better.

Thank you!

Avatar
Blaze45
January 19, 2011.




You did it wrong when pulling it out. You should have removed the bolts holding the torque converter and pushed it away before taking the engine out. That way the torque converter would stay seated correctly.

Once the torque converter is on the input shaft, turn it and ease it in as far as possible and ensure it is seated correctly.

After engine is in and is flush with transmission, ensure the torque converter turns freely before installing and tightening transmission to engine mounting bolts first.

Tighten torque converter bolts after above steps.


KHLow2008
Feb 9, 2011.
Well I got a change to work on it today with a hoist. And. It looks like I got it to work! Now it is just a matter of putting it all back together and figuring out all the belts. Ill keep you posted if I need assistance with anything else.

Thank you!


Blaze45
Feb 12, 2011.
Update - It seems to be running ok but sometimes the car's lights will dim and and the car will act like it is going to die to the point where all the cluster lights flicker. Today I cleaned off the positive battery post and it stopped however I recalled that there were 2 things that didn't have a home when I finished the swap. I honestly have no idea where these 2 things belong or what they do. I believe one was taken off the intake manifold somewhere, I have yet to find a plug for it and the other plug is over on the drivers side by the battery and is connected to the wiring harness.

Thanks.
AD


Blaze45
Apr 16, 2011.
First component is a capacitor, it should be bolted to ground, somewhere on top of the thermostat housing.

As to the 2nd wire, the picture is too concentrated in one area so I am not able to understand what it is for. Some wires are not used as there are for different markets so if you do not have any issues with components etc, then it should be nothing to worry about. Let me know the wire color and I will see if I can come up with anything.


KHLow2008
Apr 17, 2011.
Picture where I am holding the plug is a single red wire with a white stripe and is located next to the battery on the drivers side and goes into the main harness.

The capacitor - I cannot seem to find a plug for it anywhere on the harness by the intake manifold so I didn't plug it in but I do remember unplugging both of these things. The capacitor is a solid blue wire single prong. It is a strange plug style too with a needle like pin right in the center of the inside of the plug.


Blaze45
Apr 17, 2011.
There should be a connector somewhere near the top rear of engine wireharness that branches out to the TPS and other sensors.

As to the wire, sorry I can't seem to find any reference to it.

I will try to get a vehicle to check and see if I have it. It might take some time as I don't have such vehicles in my shop at the moment.


KHLow2008
Apr 17, 2011.
I appreciate your help! Thanks.


Blaze45
Apr 21, 2011.
Have a 1998 Montero and was looking to do an engine swap to the 4M40 2.8L Turbo Diesel that came in oversea markets. Any input would be great. Also, the information you all traded in this post was great!


Tiny
Wlcm
Jul 14, 2011.
What would you like to know?


KHLow2008
Jul 14, 2011.
Are the engine mounts the same for the 3.5L V6 as they are for either the 4D56 2.5 TD or 4M40 2.8L TD? Seems the 4D56 may be easier to get. Also, what about the wiring harness? Do you know of any shops that are very good at this?


Tiny
Wlcm
May 22, 2012.

AD