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.




Engine mounts are different and so are subframes.
I don't think there are any specialist on such works and it would depend on where you are located. Check oyt the local parts stores for any recvommendations. They would be the best person to recommend any place.

KHLow2008
May 23, 2012.
Hi Blaze
I am going to what you've been through. I am replacing the engine on my 1998 minstubishi montero Sport. I put close to 240,000 miles on it. I got a japanese engine with roughly 50,000 miles on it.
I would really apreccieate some guidance. I could not find anything on the internet about engine swapping.
Here is where I am right now: 1. I detached everything from the engine (electrical wires, tubes etc)
2. Took down the starter, detached the AC pump and the steering wheel pump. (Left the AC pump and the steering wheel pump connected to the frame)
3. Took the colant radiator down.
4. The engine is still on its supports. I need to detached the engine from transmission, how do I access all the bolts the are connecting the engine to transmission? A previous answer to your post, suggested lowering the front axle. How far did you lowered it?
Thanks a lor.

Tiny
Marceluss
Jan 20, 2013.
You would need to get under vehicle and remove the cover on transmission just after the engine. Once cover is removed, you need to remove the bolts holding the flex plate and torque converter.
After removal of the bolts, push the torque converter as far back as possible.
Remove the bolts holding the engnine and transmission and use a floor jack to support the transmission. You might need to jack up the transmission as you hoist the engine up. Once engine is off the mounts, ( I presume you have removed the bolts) you can separate the engine from trans and pull it slightly forward for lifting it out.
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KHLow2008
Jan 23, 2013.
I did all this, and now I am stuck at the two top bolts that hold the engine to the transmision. I am thinking to release the engine from its supports. That would probably give me a few inches so I can access the two top bolts. Other than that, everything seems to be going smooth so far.

Tiny
Marceluss
Jan 24, 2013.
Hang the engine with the host. Remove the engine mounts and lower the hoist to gain the space. If you have a flexible coupling socket, you might be able to get to the bolts. Space is tight but manageable.

Reinstall and tighten the 2 bolts at both side of engione block and transmission first. This would allow the upper bolts to be easily removed after loosenning. Failure to do so would result in engine and trans trying to break free of each other and this would hamper the bolt removal.
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KHLow2008
Jan 24, 2013.
Thank you KHLow2008. I did just that. I was abble to get the two top bolts after I lowered the engine. Today I finally got the engine out. It came out with the converter from the tranny. Any good suggestion how to put the engine back on? Ofcourse it is going to be the reverse process : ).
Again, advice very much appreciated.

Tiny
Marceluss
Jan 25, 2013.
You have to reinstall the torque converter onto the thransmission and ensure it is seated as far back as possible. You need to rotate the torque converter and at the same time lift it to allow it to slip into position. Failure to do so would damage the transmission.

When engine is seated back, ensure it slots in fully and becomes flush with transmission. Do not try to force it in as improper seating of torque converter would cause that. After tightening the engine to transmission bolts and making sure the engine and transmission is flush, turn the torque converter manually. It should turn freely and there should be a gap in between torque converter and flexplate.

You might need to lower or raise the transmission while trying to slot the engine in.

KHLow2008
Jan 26, 2013.
Make sure to detach the flexplate from the torque converter when you re install everything. Flexplate bolted to the engine, torque converter seated as deep as it will go into the transmission. I would add some fluid to the torque converter myself while it is off unless you didn't spill any during removal.

You CANNOT leave the torque converter on the engine while trying to re install it. There is no way you can get the converter to slide into the tranny while the converter is still attached to the engine during re installation of the engine.

Good luck.

Blaze45
Jan 26, 2013.
How do I acces the bolts on the torque converter, after I put the engine on?

Tiny
Marceluss
Jan 26, 2013.
I mentioned getting to the bolts from bottom of engine, after removal of the service cover plate.

KHLow2008
Jan 27, 2013.

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