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https://forums.nasioc.com/forums/showthread.php?t=631527 https://forums.nasioc.com/forums/showthread.php?t=2220331 Also, I suggest PMing 86Bratman. He has built a few frankenmotors, and would have helpful information. He gave me great advice when I built my 2.5 SOHC block/2.5D Head motor. Good luck.

I don't the performance gains are worth the effort with the 22-heads. The 2.5D/2.2 heads combo just isn't that impressive unless you spend the money for cams, and exhaust. If you do try and mate the with the 2.5 SOHC block, the performance is unknown... Also, which headgaskets would you use? The cheapest route would probably be to just keep the waterboxer in place and enjoy it for what it is... But in my opinion, after having done many different motor swaps, the time and money can be wasted if you cut corners... I don't think you have the right components to mate for a frankenmotor. I think you either need to find a 2.5D block for the 22 heads, or 2.5D heads for that SOHC block. OR, just figure out what is wrong with the SOHC long-block and fix that. It's not an impressive motor, but it will work well, and I hear the SOHC heads actually flow pretty well. You can pop the heads off, and fill the intakes with water to see if there are valve issues.. There are plenty of videos on youtube that can help you determine if there are valve issues... If none of them are problematic, then you'll know if it's the block. The SOHC block and DOHC heads is a great motor. The DOHC block with 22 heads does come with a power improvement over stock as well, but it is limited. You may need to call around to different Subaru specialty shops to pick their brains and see if your combos can work.

well, considering the OP is in Oklahoma, i would be willing to bet it is a USDM car.

Hello again its been a little while, juggling a few hours here and there to finally get the little engine back together again. so we have installed new piston rings, main bearings, conn rod bearings, seals for crank, cam, valve stems, water and oil pumps, and the belts. Everything has been deep cleaned, there’s a new clutch kit, and hey, it started on the key as if nothing had happened! no smoke, no rattles, and it doesn’t miss a beat. Now the tricky part is treating it gently whilst we run her in. Taking General disorder’s advice, I did not touch the decent bores, letting the piston rings do their job with some SAE 30, now changed after 30 miles of run-in. Running in: First start I disconnected the fuel system fuse, letting the engine crank on the starter until we reached oil pressure. Then with everything connected I started the engine and gently played with the revs (2-3k) with gears in neutral for about 20 minutes. all good, so onto the road run; a good 30 mile drive, gently building engine speed then deccelerating in gear. No problems. fresh oil and filter, and now I shall accumulate another 500 miles of gentle highway before a further oil change. Then 1500, then every 3-4000 miles as usual. so i’m a happy bunny, time to give the forester it’s service.

You need to replace the camshaft carrier, not the head. GD

http://www.ultimatesubaru.org/forum/topic/23034-its-done-swapped-ej22-for-ej25-in-97-outback/ Why are you swapping? If you can do an engine swap, you can do head gaskets... Or you can make a frankenmotor for 180-200 hp, which is decently simple to make

No I haven't done it yet, I'm still on the fence about it honestly. The msd coil is one made for a Neon, to make it work you have to get a pig tail from one and splice it together with a pigtail from the subaru to make an adapter harness so it's plug and play.