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Old 10-18-2004, 09:55 PM   #1
mtbwilson
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Your NASIOC Administrator '95 2.2 swap to a 2.5?

I have a '95 legacy with a 2.2, and the engine sounds like it has a bottom end tick. I'm wondering how easy it is to redo the bottom end? While putting the money in, I'm wondering if it's worth it to try and put a 2.5 DOHC or SOHC in. Would that be relatively easy? Thanks!
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Old 10-18-2004, 10:00 PM   #2
mafiamotorsports
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1996 OBS(GFC)
94 Mitsu Diamante LS

Outback Sport

It would bolt in fairly easy.Not quite sure on how much wiring you would have to splice but if you can do wiring it shouldnt be to much trouble for you.
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Old 10-18-2004, 10:08 PM   #3
pr0driveX
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I'm pretty sure this has been covered before. Check the conversion forum for more imformation.

Eric
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Old 10-19-2004, 08:41 AM   #4
JonofScio
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you'd want to find a late model EJ25 (ie: phase II) in which case, it would be way more expensive than pulling your motor and putting in new rings and bearings.

new rings: $60 chromoly
new bearings: $20
(from carquest)

new gasket/seal kit: $260 from SUBARU

Also, with a regrind from delta cam, you're looking at a peak horsepower that's only 3hp away from the EJ25. All the reliability of your EJ22, and none of the problems of an ej25. (cracking the 4th cylinder walls... head gasket issues... ect.)
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Old 10-19-2004, 01:52 PM   #5
Tim Sanderson
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00 Impreza 2.5 RS
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Do you have a lift and a fairly comprehensive set of tools? Jonofscio has a decent list, but you'll need more than that to get it done.

plastiguage
piston ring compressor
piston ring tool(for removing)
14mm allen wrench(not common)
crank may need to be machined
rods may need replacing/matching weight.
assembly lube.
any new accessory pieces(oil pump,timing belt,tensioner,water pump,idler pulleys)
If the noise is piston slap you'll need the bores machined which will require oversized pistons/rings.
bore guage.

By the time you get it done right, you might as well have bought a new short block and the engine gasket kit and called it a day. You will save money, time, and a lot of hassles. That's what I would do unless I was feeling adventurous.

Good luck with whatever you decide.
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Old 10-19-2004, 10:57 PM   #6
Storm
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Quote:
Originally Posted by JonofScio
new rings: $60 chromoly
new bearings: $20
(from carquest)
You might add that's per cylinder. My bearing quote from the dealer(crank and rods) was more than the gasket kit.

Quote:
new gasket/seal kit: $260 from SUBARU

Also, with a regrind from delta cam, you're looking at a peak horsepower that's only 3hp away from the EJ25. All the reliability of your EJ22, and none of the problems of an ej25. (cracking the 4th cylinder walls... head gasket issues... ect.)
A decent EJ25 can be had for less than $800 and transferring of sensors will allow the motor to run off the same ECU.


Jay Storm
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