Offroading Subarus

Where we modify and drive flat fours

Fitting the EJ22 Subaru engine into a Subaru Brumby/Brat

This is the relatively easy part of the EJ conversion.
Lets start with the engine crossmember. On the older EA81 cars you need to slot out the two holes for the engines mounts about 8mm towards the outside of the car on each side. On the EA82 cars you don’t need to do this as far as I know. Now that you have done this, the engine will bolt right in, except for the gearbox/transmission.

For the new EJ22 to bolt to your existing gearbox you will either need a 12mm thick adapter plate which will allow the EJ to fit on the EA82 or EA81 gearbox. If you go this way you will also need to either slot out a EA82 flywheel center bolt holes to fit your EJ engine or get a machine shop to fill the holes and re-drill the same EJ pattern to your EA82 flywheel (sorry, I didn’t get around to doing this so I have no pictures of the modified flywheel.) If you have a PT4WD 5sp the clutch should bolt to your modified flywheel and slot onto your gearboxes input shaft no worries using the 5sp’s thrust/throw out bearing.

The Adapter plate is relatively easy to make on your own. All you need is a sheet of cardboard big enough to trace out the EJ engines bell housing and EA gearbox’s bell housing. Approximately a 500mm x 500mm sheet of 12mm or half inch thick aluminum. Along with a jig saw and drill.
To start with the process you need to trace the bell housings. I found this easiest done with very thick cardboard and a hammer. Cut a big bit out of the center (kinda where the flywheel was going to go.) Then punch the two lower mount holes out for it using an EJ22.
Place it over the EJ22 bellhousing, then used a hammer and tap the cardboard around the outside of the engine bellhousing.
Then place it on the EA trans (I used a 4sp for this, but I don’t think it matters.) And do the same, but on the inside of the trans bellhousing. Then cut it out and mark the 4 other holes (2 for engine, 2 for trans) with a pencil.
Place this on the plate of alloy and mark it out. Then cut the alloy out with the jig saw and a drill. Using the drill to start off and help making sharp corners and the jig isn’t good at that. Drill out the other holes and thread them. Or what would be better is to fit helicoils in the plate for extra strength. Or you can also cut out a slotted shape hole and use two cut off high grade bolts welded together as an offset stud, this would be very strong. If you don’t get the top holes exactly right like I didn’t then don’t worry. Just get the drill and widen the holes till the bolts fit through.


A must look is Numbchux’s EA2EJ EJ conversion write up. You can download it from here!

EJ22 adapter plate for 5sp PT4WD gearboxEJ22 adapter plate for 5sp PT4WD gearboxEJ22 adapter plate for 5sp PT4WD gearbox

EJ22 adapter plate for 5sp PT4WD gearboxEJ22 adapter plate for 5sp PT4WD gearboxEJ22 adapter plate for 5sp PT4WD gearbox


I bought my first Subaru back in 2005, it was a 89 Brumby, flair red. I lifted it, fitted Kumho 27″ MT’s. After a while I swapped the dual carb EA81 it had with an EJ22 bolted on a custom gearbox which used EJ D/R casing, EA82 5sp low range and an RX centre locking diff. Once I sold the Brumby I got a 83 Leone. Converted it to 4WD, put the Kumho’s on it, added a 5sp and drove it like I stole it. I then upgraded to a 99 Outback. It was hail damaged so I repaired it myself. I fitted it out with some storage and a mattress. I now have a 87 Brumby that I’ve resprayed with two pack urethane in Waratah Red. I am planning to fit an EJ with PT gearbox and a little bit of lift. It’s another project in progress.

Phizinza – who has written posts on Offroading Subarus.

March 1st, 2007 by Phizinza
Posted in EJ22 Conversion