MX-3.com

w00t! I got the new engine in my car earlier today.... it fits perfectly, just as it should. Only one major annoyance that I really have to point out:

When you install your new throwout bearing with your clutch, make SURE that your clutch fork is seated properly. A short guide to installing the bearing follows:

1. Pull the clutch fork away from the transmission slightly, to give room to install the throwout bearing.
2. push the clutch fork in, making sure to clip the little spring clip thing on the top of the little nub there, and sliding it over the little hooks on the bearing.
3. That should lock it in place. Don't knock the transmission too hard when installing it, or you might dislodge the clutch fork and bearing. (That's what happened to me.... grrrr.... I had to take the tranny off and fix everything, and then I had a real pain of a time installing the tranny again [couldn't get the input shaft to slide in... had to rotate it a few times])

Alright.... other than that, installing the new engine is really simple.

New Engine Install:
1. Remove the transmission's mount on the top, to give a little more wiggle room.
2. With a friend, slowly drop the engine in.... turning it or whatever to line it up to let the bottom mounts on the transmission slip into their holes on the motor mount member. Bolt those up.
3. Put the upper transmission mount on, screwing on the three bolts on the transmission first, then put the actual chassis bolts in loosely, tightening each slowly, to make sure they all stay on.
4. Connect wires, coolant lines, fuel lines, vacuum lines, throttle cable, etc.
5. (Manual Transmission Only) Install clutch slave cylinder, making sure that the little rod inside plugs into the clutch fork. Install shifter stabilizer bar, bolt it up. Put screw through top of shifter rod, pound down, put nut on and tighten enough to let it still move.
6. (ATX only) Install whatever it was that was on the auto tranny... I forget, so sue me!
7. ummmm, not sure what else you need to do

atlantamx3 wrote:Just because you didnt have the smarts to take the tranny out WITH your engine, doesnt mean that other dont.

If I remember correctly, you tried to half-a-- it and got screwed because of it.


There are plenty of swap reference guides out there. The BP swap is probably THE EASIEST engine swap to do as long as you have done your homework. How many other engines will bolt RIGHT in, use your STOCK tranny, use your STOCK mounts, use your STOCK Wiring harness (minus two wires) and will have the ECU from the new engine PLUG DIRECTLY in to your STOCK hanress??


I mean, damn. How much more simple can you be? Even handa swap require you to cut/splice abunch of crap and move mounts around and everything.

The BP swap could be done in ONE DAY if you have all of your parts lined up.

My parts list can be found here: (Keep in mind, I swapped the trannies too-- so some stuff will not apply. This requires you to use some COMMON SENSE)
http://www.atlantamx3.com/BPswap/totalspent.JPG

GRO HARLEM has done some darn nice FAQ stuff for this swap as well.


I dont see why you need to make a NEW "How TO" for this swap. Every swap is going to be different and have different snags. Making a list of everything that can go wrong, and eveything that needs to be replaced is kinda pointless. Some motors are in better shape, some arent. What NEEDS to be replced could be EVERY sensor on the motor.

to answer that the KL into a GS is easier, no wire swaping but i see your point

dude it's been a year

i figure why not add info
it might be useful to someone

appreciated, I was only kidding

i just thought i should add that everyone is talking about swapping a BP into a SOHC mx-3, NOT the DOHC. just in case someone with a DOHC is reading this thread and thought the wiring would be simple.

mine is a 94 DOHC.
I used the BPT ECU, VAF ad wire harness
Also used BPT Distributor and Ignition coil


I believe I used DOHC starter.

I did use the DOHC pulleys.

BP Throttle Body, tranny and axles and half shaft (joint shaft)

Engine mounts are from both BP and 1.6

dude, thanks, this info is gonna save my hide, i
am looking into doing a swap hopefully and or sell the car.
apreciate you guys.
I will let you all know how it goes.. maybe come to your town and own your car on the drag strip. = P

im gunne renew this topic because i personally with little to no engine swapping experience, feel that this will help me alot so that you a bunch!

It probably will not help you. You don't reallt need experience. You just need to mark the wiring, take the axles out (easier to unhook the half shaft rather than trying to force the axle out of it), unhook your shift cables, coolant lines, power steering lines, a/c lines, and the three motor and tranny mounts and the engine is out. Just be observant and you will be a god lol. Just go to four cylinder fax on mx-3.com and learn how to change a couple of the mounts around.

[quote="ryanlindenberg"]i just thought i should add that everyone is talking about swapping a BP into a SOHC mx-3, NOT the DOHC. just in case someone with a DOHC is reading this thread and thought the wiring would be simple.[/quote]

LOL. Already know trying to get a protege wiring harness and doing a whole cable speed sensor swap

yea, i found lots of helpful things, some engine sensors i dont even know the names for. im the first one to write in this thing in a LONG time.

mazdamx3sohc wrote:yea, i found lots of helpful things, some engine sensors i dont even know the names for. im the first one to write in this thing in a LONG time.

Nick, Call Maztech in Tampa (813) 874-0937 . Ask them how much is it for a BP swap. That way everything will be done with no hassle, except $.

money, plus how am i gunna get my car there and get home and pick up and all that. i dont think im gunna do that bp swap anymore, just build up my sohc.