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Old 03-03-2011, 09:01 AM   #1
Mauricio
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Default My game plan: '04 WRX into '00 RS motorswap.

I am looking to join the boosted club soon. I found an auto WRX donor that runs, that I will be pulling the swap from. Here is a break down of my game plan:

Wiring by someone else. I would rather not deal with electrical gremlins due to me misreading a wiring diagram.

from the RS:
pretty much everything unless mentioned.
complete interior
AC/heat
steering column
Brake calipers
flywheel/clutch/trans ( I will possibly do 6MT swap in the future, as money permits)
Instrument cluster

from the WRX:
Front assembly (motor swap, cross member, arms rack, hubs, caliper brackets, swaybar/endlinks, rotors, abs sensors)
Rear assembly ( diff, lat links, axles, hubs, caliper brackets, swaybar/endlinks, rotors, abs sensors)
ECU, (& merged harness)
Exhaust (stock exhaust was bent, so I am using a 3" borla hush sysytem)
Alternator (newer, and already bolted to the motor)
Power steering pump & hoses
Throttle Cable/cruise control (w/RS switchgear)
Fuel pump/ controller
MAF/o2 sensors
Boost controller (use factory for now)

major issues (listed in the order I will address them)
WRX wide track, including:
Axles: I found a set of wrx 5mt front axles
Knuckles/ABS sensors (I re-pinned the rear RS ABS plugs to accept the WRX ABS sensors, it works. Let's hope the fronts do too.)
front lower control arms
rear trailing/lateral links
front swaybar/endlinks (stock wrx or stock tribeca currently on the car?)

Steering rack:
(the plan is to swap the pinions on the racks as seen here: http://forums.nasioc.com/forums/show....php?t=1335063 )
4EAT Donor into 5MT recipient: The conversion is detailed here:
http://forums.nasioc.com/forums/show...1&postcount=19
I know I have also seen an in-depth how to on the electrical side of this. Something about plugging the auto VSS into the 5MT, and wire the clutch-starter interupt into the Park/Neutral sensor. I will just have to dig it up.

Misc (stuff I need to buy, or take into consideration) :
Timing belt covers from a 5mt wrx
Oil seals
Oil change kit
timing belt
water pump
coolant
pullies/tensioner

Donor is currenlty using an AEM CAI, and I sourced a 3" exhaust after the down pipe. (Is a tune necessary given the only mods currently in the plans are the CAI and exhaust from the downpipe back?)
Any other general maintenance I should do before the motor goes in?

Feel free to chime in if anything is blatantly missing.

I'd like this thread to become a good reference, as well as a record of what actually went into my car, (were those wrx rotors and calipers I swapped, or just the rotors? etc.)

thanks.
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Last edited by Mauricio; 11-07-2012 at 12:50 PM. Reason: updates..
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Old 03-03-2011, 12:07 PM   #2
207STi
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I saw this post over on RS25, from what I can see everything seems to be legit. Now let's see some progress pictures!
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Old 03-03-2011, 01:56 PM   #3
KONKILR
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Your gonna need to install timing belt guides on the wrx engine. Engines in auto tranny cars do not have belt guides, they are a needed item in manual trans cars. Without them the timing belt can jump teeth.

jake
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Old 03-03-2011, 07:24 PM   #4
Mauricio
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Foolio- I am taking delivery of the car this saturday, and I will make sure to take plenty of pics throughout the process.

KONKILR- Thanks for the heads up. That would have definitely slipped through, and of all things, that might be the worst case scenario. Is that something I can pull from my EJ25?
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Old 03-03-2011, 08:24 PM   #5
KONKILR
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The one for the crank pulley can be pulled from your old engine, but the ones for the cams are unique. I am not even certain if the mounts are on the timing belt covers on an automatic engine. So you may need to get new timing belt covers.

jake
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Old 03-03-2011, 11:37 PM   #6
Mauricio
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I will check the inside of the covers and report back on whether or not the 4EAT timing cover has any kind of guides. In the meantime, I will start to look for pics of the 5MTcovers so I have something to compare to.

thanks again,

Edit- just found this:
http://forums.nasioc.com/forums/show....php?t=2133242
It's not absolutely necessary apparently, but it is something that I will probably look into, and correct.

Last edited by Mauricio; 03-04-2011 at 03:48 PM.
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Old 03-05-2011, 02:11 PM   #7
Mauricio
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nothing to report as yet, only that I have the car in my possession now. I need to swap in an Oil filler neck, as the original snapped off, halfway up the neck. For now, here is a pic of the trip home, and both of the cars together.

http://s36.photobucket.com/albums/e41/MauricioF_713/subaru/?action=view&current=IMAG0271.jpghttp://s36.photobucket.com/albums/e41/MauricioF_713/subaru/?action=view&current=IMAG0272.jpg
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Old 03-09-2011, 11:19 AM   #8
Mauricio
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bump for some updates, and some general cleanup of the first post..

Last edited by Mauricio; 07-20-2011 at 10:36 AM.
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Old 03-09-2011, 07:06 PM   #9
JoePokah
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Whew! Looks like you got a good list there. I'm finishing my 02 wrx into 98rs swap... I don't know how mechanicallu inclined you are, looks likke you have a good knowledge... I would replace all gaskets while u have motor out. Gas tanks are not worth swappin imo-we kept rs tank in mine. I don't know if u plan on doing dash swap too... I did and we ran into fitment issues with the dash beam-required a little cutting and weldin of brackets to fit right and you will have approx 1/2 space on either side.... I Hvac from wrx extends out further and requirws custom piping and cutting of the unit itself (if u use wrx hvac). I am not sure if 2004 wrx into 2000 rs is a bit different-someone chime in? So I just left ac out. was skeptical about putting airbags into a rs from a different car because of seat positions and angles and I didn't know if it'd take my head off so I am putting racing seats+harness.Leta see... I sourced my axles locally forr 100 used, not a bad deal. Since they are heavy if u can't find locally-might just want to order new locally... I can help with questions u may have seeing as I am finishing mine up.. hope this info helps! I'm on my phone so pardon spelling.
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Old 03-10-2011, 01:23 AM   #10
Mauricio
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Thanks for the encouragement, I need it.

I am planning on keeping my interior as stock in appearance as possible, so the Dash swap is out of the picture.

I think I will end up ordering the shafts locally like you suggest.. save the headaches of waiting for someone to pop up with what I need...
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Old 03-11-2011, 05:43 AM   #11
JoePokah
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Just saw that you are in Houston. Are there a lot of subaru enthusiasts in Texas? I am transferring out the for work in August and am unsure what to expect. I Have lived in California my WHOLE life and am not sure what it is going to be like. Should be be heading the Fort Worth/Arlington area i believe. Anyways good luck,

Jeff
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Old 04-04-2011, 12:47 PM   #12
AliBenn
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alright mauricio!!!!!

cant wait to see your progress!

for your axles...try ASAP 713.681.2777 290/magnum
bring them the ones your arent going to use to avoid a core charge! ($75each)
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Old 04-04-2011, 03:17 PM   #13
Mauricio
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Joe - I have limited exposure to the dfw crew, but I think on the average they're a good bunch of guys.


steve! thanks for the encouragment. your car is what my car wants to be when it grows up. this will do for the time being.. I got the front halveshafts locally for $50, would you happen to know if I can sell the auto shafts to ASAP?
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Old 04-04-2011, 05:57 PM   #14
AliBenn
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^^^i would think so......i would definately ask!
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Old 04-05-2011, 01:27 AM   #15
Mauricio
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rear diff, swapped thanks to this thread:
http://forums.nasioc.com/forums/show...php?p=33767021
running good for a few months, as of this edit date..

Last edited by Mauricio; 07-20-2011 at 10:38 AM.
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Old 04-14-2011, 12:13 PM   #16
Mauricio
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update!

I finally had time over the weekend to swap rear sway bars, and drop the rear assembly on the wrx. It took a bit of doing, but it is out. The first thing I did was to get the rear calipers out of the way, by unbolting them from the brackets, and tieing them up to the spring. I undid the 4 bolts holding the e-brake cables to the body. After pulling the interior,I had access to the parking brake cables inside. I unbolted the e-brake lever, conlsole mounting bracket, and pulled the ends of the brake cables loose. Once those were loose I pushed the cable grommets through the holes, and got back under the car. I un-did the 6 trailing arm bolts, and 4 lower strut bolts. I then removed the driveshaft cover plate from the diff assembly, and then removed the drive shaft itself. I felt like I needed more room, so I unbolted the carrier bearing (2 bolts) and got the shaft out of the way. I placed a floor jack under the rear dif and snugged it up to it before removing an exhaust shield that is mounted on the diff, and finally the 2 bolts that hold the "T-brace", and the 4 that hold the rear cross-member. It balanced pretty well directly under the diff as I lowered it slowly. Pics to come.

Last edited by Mauricio; 07-20-2011 at 10:38 AM.
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Old 04-25-2011, 12:43 PM   #17
Mauricio
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RS Rear assembly is out, WRX auto rear is in. Pretty much the same process as on the WRX, but alot faster the second time around.

After positioning the wrx assembly under the RS, I lowered the car on the jack stands to their lowest setting to make it easier to lift the assembly. lift the assembly, bolt in the crossemmber, and then t-brace second. lift the car back up, and reverse the removal process.

It took me, 8 hours friday, and 8 saturday, with no help or air tools. not bad...

next step (besides buying air rachets ) is to pull the wrx wiring required for the swap.

Last edited by Mauricio; 07-20-2011 at 10:39 AM.
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Old 05-02-2011, 06:01 PM   #18
Mauricio
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Update:The rear WRX ABS sensors are wired in, and working properly. I decided to re-pin the harness side of this plug incase I ever had to replace a sensor, it would be plug and play. I was surprised to see the ABS light turn off when I hooked the battery back up, and turned the key to start it up.

Last edited by Mauricio; 07-20-2011 at 10:40 AM.
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Old 06-01-2011, 01:56 AM   #19
aroncranford
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i have been trying to find out which crossmember is the best for the swap i have an 04 stiengine 04 5speed all going in an 01rs, but i am without a crossmember and if anyone could chime in or drop me a line that would be great!

i am keeping up with you thread cant wait to hear about and see more progress!!
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Old 06-01-2011, 08:30 AM   #20
Mauricio
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the swap is on hold for a bit, (I am working a little side job that should fund the wire merge )

as for the crossmember, it depends. If you plan to use your stock control arms/trailing links/axles/etc, then a jdm turbo, or 1st gen usdm legacy ss will do. You can also use a usdm wrx crossmember, but you will have to shim the lower control arms in the front. search "wrx crossmember shim" in this forum.

Be sure to get a matching rear differential for your 5speed (look into the drivetrain
forum for the Transmission F.A.Q. thread to see what works for your particular set up..

Hope this helps.
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Old 06-24-2011, 02:34 PM   #21
Mauricio
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Can anyone tell me how to ID a longblock? I just remebered that the guy who sold it to my said he had the OEM "motor" replaced.

His daughter drove the car into a flooded street and the AEM CAI sucked in just enough water to flood the motor. Being that she was in college on the west coast, she "found a shop that put in a low mileage JDM motor" which she drove around for 5 months until the car was rear ended. He couldn't back up his claim with any paperwork, but I considered it a "no-loss" situation for me as sourcing parts jdm maintenence parts should be easy on the forum.

The car does have a usdm wrx ecu (W6 if I remember correctly), tgv's, and hooks up to an obdii scanner so I suspect they swapped out the long block, or at minimum just the short block. For all I know, she had daddy buy the jdm block, gave it to a friend and swapped in another usdm wrx block. So how do I tell if the block and heads are JDM or USDM? I have read that there is a sticker on the timing belt, but I couldnt find one on this car. I have also heard that there is a stamping on the block, but I don't know if it is under the alternator, or the intercooler..

Help?

Last edited by Mauricio; 07-20-2011 at 10:43 AM.
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Old 07-20-2011, 10:47 AM   #22
Mauricio
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more updates
I pulled the wiring harness off the WRX and am sending it out to be done by this week, hopefully.

I need to start stripping out the RS, but I am unsure how much of it I will need to strip out. I know the dash, re-bar, hvac & carpet have to come out, but things like the roof, & rear parcel shelf don't, right?

Last edited by Mauricio; 11-07-2012 at 12:43 PM.
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Old 07-20-2011, 01:52 PM   #23
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