3.4 swap into 1985 Jeep Cherokee questions?

[geoffinbc]

Well a whole bunch of engine functions may become disabled. I am not certain exactly what will happen. You don't need to find the ECM from a manual trans car. You could just find a chip or have a chip burned for you.

[cardana24]

I am not sure what engine functions would be affected by a transmission sensor. I know on 4th gen maximas (what i am used to working on) it will just be a matter of having a check engine light on for a missing transmission sensor but it does not affect performance, you just would not be able to pass inspection.

[Canyonero]

You can find plenty of them on eBay if you need to go that route. I had an AT ECU for my swap, but I picked up a MT one before I started it.

http://cgi.ebay.com/ebaymotors/Camaro-3-4L-94-95-Engine-Computer-ECM-ECU-16196397-MT_W0QQcmdZViewItemQQcategoryZ33596QQihZ018QQitemZ280208126496QQrdZ1QQsspagenameZWDVW

[cardana24]

You can find plenty of them on eBay if you need to go that route. I had an AT ECU for my swap, but I picked up a MT one before I started it.

http://cgi.ebay.com/ebaymotors/Camar...spagenameZWDVW

Yeah I know there are many on ebay. I'll pick one up at some point.

[cardana24]

I have finally drained the fluids in my jeep and I am ready to move forward with the swap. I have a question about the flywheel though. I know I can have the one that I have neutrally balanced but can I pick up another one that is already neutrally balanced? If that is the case would this one work with no modifications? http://cgi.ebay.com/ebaymotors/MANUA...3756.m20.l1116

This may be a quicker and possibly cheaper option than waiting on a machine shop. Let me know what you guys think.

[Canyonero]

I just bought a new one from partsamerica.com, I think they have a core charge on some of them (I never sent mine in, oops).

[anotherjeep]

I am looking forward to seeing how your swap turns out. Planning on doing the same in my 85 xj in a few months. I've got an automatic though so not sure how i am going to handle that.

[cardana24]

I just bought a new one from partsamerica.com, I think they have a core charge on some of them (I never sent mine in, oops).

which one should I buy though? I know I need one that is neutrally balanced...what years would that be? Also will the bolt circle line up with no problem? ^^ Do you have a link to the one you got? Was your trooper motor balanced internally or externally?

[Canyonero]

My Trooper is a '90, so it is new enough to have a neutrally balanced flywheel. I bought whatever was recommended on the website.

I got this: http://www.partsamerica.com/productd...pe=267&PTSet=A

[cardana24]

ok that one says 142 teeth, the one that is for the cherokee http://www.partsamerica.com/productd...pe=267&PTSet=A says it has 148 teeth. I am guessing this is a problem. Does anyone know which neutrally balanced flywheel I can use?

[Canyonero]

The Camaro/Firebird flywheel has 148 teeth...

http://www.partsamerica.com/ProductDetail.aspx?MfrCode=SFW&MfrPartNumber=6502&PartType=267&PTSet=A

[cardana24]

The Camaro/Firebird flywheel has 148 teeth...

http://www.partsamerica.com/ProductD...pe=267&PTSet=A

that one is listed as fitting the 2.8 FI Camaro's...so does anyone know if it will fit my 2.8 jeep with no mods? Will my starter work on this?

[Canyonero]

You may want to be looking at the machine shop again. I really don't know.

[cardana24]

You may want to be looking at the machine shop again. I really don't know.

I'll see what any one else has to say. I do not have the engine out yet, but I hope to have it out in a week or so, so I would just like to know by then.

I worked on it for a little bit tonight. I have taken out the radiator, evaporator/dryer, E-fan, all the drive belts, alt., and ps pump. I am taking pictures along the way I will post a few up when I have made some more progress.

Also I realized I have a broken exhaust bolt in one of the heads. What have you guys done to get these out? I tried using one of those bolt out kits but I ended up breaking the thing off in the hole, so now I have a flush stud again I am thinking about just taking the engine to a shop and having them get it out. Do you guys know of another way I can try with out taking the head off?

[geoffinbc]

If you have broken and easy out off in the bolt then you pretty much limited yourself to welding a piece of metal to the stud and trying to get it out. Welding something on will also rapidly heat the broken stud hopefully breaking it free. My Trooper also has a broken bolt on the exhaust manifold where the PS pump bracket mounts.