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Old 06-10-2010, 10:21 PM   #1
LTracer
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Default MY05 RS Engine Compatibility

Engine failed (long block is confirmed junk) in my MY05 2.5RS M/T. Getting a few different stories about engine compatibility. Dealer says only matching engine would be from a 05 2.5RS M/T. Their story was the wiring harness from other models (legacy, outback, forester) is different as well as a slightly different cam profile for A/Ts. Any of this true? Local salvage places all claim any EJ253 with the "6" VIN will fit perfectly. Anything '06 is out of the question because of variable valve timing. Found an '05 engine with only 1,000 miles however it's from an A/T. What MY/TRANS engine will work?
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Old 06-11-2010, 02:05 PM   #2
williaty
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Work, or work perfectly?

You're not doing this on your dime. Get a exact-fit engine. There's a number of places that sell them.
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Old 06-12-2010, 01:03 AM   #3
LTracer
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Not a true statement, I'm doing a fair share of it on my dime. Found a great motor in SD from an '05 Impreza A/T. To answer my own question the only difference is a bracket on the crank pulley of the timing belt that prevents the timing belt from jumping. Apparently timing belts on M/T tend to be more squirrely, or perhaps it's just the drivers...

Quote:
Originally Posted by williaty View Post
Work, or work perfectly?

You're not doing this on your dime. Get a exact-fit engine. There's a number of places that sell them.
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Old 06-12-2010, 01:11 AM   #4
williaty
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Damn, that sucks.

Anyway, the factory service manual shows the timing belt guide above the crank sprocket to be present on both the MT and AT models.
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Old 06-12-2010, 10:25 AM   #5
flstffxe
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^^ The manual may show it, but I have only ever seen one AT that actually had it, all of the MTs I have touched have had it.
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Old 06-12-2010, 02:14 PM   #6
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I'm beginning to have less and less faith in the manual.

In addition to this, there's so many errors in the listed torque values plus the whole missing fender assembly from the 06 manual.
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Old 06-14-2010, 02:36 AM   #7
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OK, kicked it around with some people for a while. The only physical year that will work is 05. 06+ have the AVLS so you can't use the heads while 04- have the cable throttle setup. Going within the MY2005 USDM 2.5L NA cars, there ARE some variations based on trim level, chassis, and destination market. However, all the variations are in sensors and wiring. If you are able to transfer the wiring harness and sensors from your original engine, you'll be able to make ANY of the engines work just by swapping over the electronics.

Hope you have a successful swap.
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Old 06-15-2010, 11:59 AM   #8
idrivetsi
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can you guys tell me what shortblock will work in a 05 legacy 2.5 (non turbo). my buddy has one with a rod knock and wants to replace just the shortblock. will one from an older forrester/impreza work? thanks.
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Old 06-15-2010, 01:11 PM   #9
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Any EJ253 shortblock will work for him.
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Old 06-15-2010, 01:50 PM   #10
idrivetsi
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Quote:
Originally Posted by williaty View Post
Any EJ253 shortblock will work for him.
what cars come with the ej253 shortblock?

how about the other ej25* (ej251, ej252, ej25d) shortblocks? will they not work?
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Old 06-15-2010, 02:03 PM   #11
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All the others have at least some differences. Compression ratio, thrust bearing position, etc. Some of the difference matter, some don't, but if he wants "buy this, bolt it there" level of easy, just get an EJ253.
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Old 06-15-2010, 02:15 PM   #12
idrivetsi
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Quote:
Originally Posted by williaty View Post
All the others have at least some differences. Compression ratio, thrust bearing position, etc. Some of the difference matter, some don't, but if he wants "buy this, bolt it there" level of easy, just get an EJ253.
what cars come with the ej253?

i do not mind a different compression ratio if that matters.
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Old 06-15-2010, 02:40 PM   #13
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Quote:
Originally Posted by idrivetsi View Post
what cars come with the ej253?

i do not mind a different compression ratio if that matters.
Impreza 99, 05+
Legacy, Outback USA 05+
Forester 99, 05+
Baja 05+
Saab 9-2x Linear 05, 06
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Old 06-15-2010, 02:48 PM   #14
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I think you can use the ej251 but you just have to use you your engine wiring so you have your maf and drive by wire. the block should be pretty much the same for the 00-04 ej251 and the 05 ej253, it was 06+ that they started using the active valves.
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Old 06-15-2010, 02:51 PM   #15
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Quote:
Originally Posted by aclver1 View Post
I think you can use the ej251 but you just have to use you your engine wiring so you have your maf and drive by wire. the block should be pretty much the same for the 00-04 ej251 and the 05 ej253, it was 06+ that they started using the active valves.
i am just using the shortblock. we will reuse my original heads and everything else because they were not damaged.

can someone confirm if i can use a 01 forester shortblock? there is one that i can get for 500
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Old 06-15-2010, 05:40 PM   #16
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I can't imagine why it wouldn't work but I'm not positive, so i would check with someone that has done it to make sure. Too bad I'm not quite ready to sell my engine yet, i probabaly would sell the full long block for not much more than that. I should finish up my 6-speed trans and full sti drive-line swap tonight with every suspension part and brace Perrin makes. So now I need to start looking for the EZ30, but I keep going back to the EG33. I can't decided. But I hope soon I will have my cammed, EJ251 up for sale.
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Old 06-15-2010, 06:03 PM   #17
idrivetsi
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from what i have been reading and asking...it should work...

except from what aclver1 is saying...he is the only one that has said no so far...
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Old 06-15-2010, 06:05 PM   #18
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what happened to the motor.
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Old 06-15-2010, 06:17 PM   #19
idrivetsi
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Quote:
Originally Posted by Whiteghost 2.5 View Post
what happened to the motor.
rod knock. yes i know we can rebuild it but that is not an option for us right now.
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Old 06-15-2010, 06:22 PM   #20
aclver1
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Quote:
Originally Posted by idrivetsi View Post
from what i have been reading and asking...it should work...

except from what aclver1 is saying...he is the only one that has said no so far...
It should work, I said i can't imagine why it wouldn't.
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Old 06-15-2010, 10:12 PM   #21
idrivetsi
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Quote:
Originally Posted by aclver1 View Post
It should work, I said i can't imagine why it wouldn't.
sorry i meant williaty said it might not.
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Old 06-20-2010, 10:59 AM   #22
LTracer
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Done with the install, used motor was literally new with the factory oil filter and less than 1000 miles. Zero hiccups with the install despite the fact that it came from an AT. Only lesson learned: injectors go bad after 5 years of sitting with connected fuel lines and that timing belts generally freeze in permanent shape and must be replaced.
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