Hey guys! First and formost im new to Subarus and after a bit of info. I just bought a 98 RX wagon and after a week of owning it the motor sh** itself (fail not happy) i have a mate that has an EJ25 motor that he'd sell to me and i wanted to know if there is a great deal of difference between the 2 other than the .5L? How much would i have to change to get the car running again with the EJ25 i guess is my question? Any info will be greatly appreciated!!
Cheer!
Swap EJ20 to EJ25 help
Started by Dizi86, Jul 08 2012 07:38 PM
38 replies to this topic
#1
Dizi86
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Currently converting a Subaru Impreza RX from an EJ20 to an EJ25 Turbo (Maybe Twin Turbo) and im going to finish it off with a complete Kicker system! Im thinking 4 Kicker 15" L7 solos with lost of splits and amps
Posted 08 July 2012 - 07:38 PM
#2
aekOne
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Posted 08 July 2012 - 07:48 PM
welcome to SC mate.
if your cars a 98 RX (is it a gen 2 or gen 3?) it should already have a EJ25
if your cars a 98 RX (is it a gen 2 or gen 3?) it should already have a EJ25
#3
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Posted 08 July 2012 - 08:09 PM
unless its am impreza?
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#4
aekOne
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#5
Dizi86
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Currently converting a Subaru Impreza RX from an EJ20 to an EJ25 Turbo (Maybe Twin Turbo) and im going to finish it off with a complete Kicker system! Im thinking 4 Kicker 15" L7 solos with lost of splits and amps
Posted 08 July 2012 - 09:03 PM
Thanks aekOne! Yeah sorry should have mentioned its an impreza RX 2.0L with a stuffed motor, what i really need to know is do i need to change the gearbox and everything in the engine bay or is it as simple as dropping it in to the car and connecting everything.
#6
Xon
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Posted 08 July 2012 - 09:10 PM
There wouldn't be any need to change the gearbox. Your biggest issue would be the ecu, without a tune there's a good chance you'll blow the 2.5 too.
I would have gone to the kitchen, collected a brown bag, dropped my dacks, pinched off a loaf in said bag, done up dacks, stickytaped bag, placed bag in envelope, and mailed it right to your face for being such a tool.
It's ok, sometimes when we herp, we also derp.
#7
Dizi86
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Currently converting a Subaru Impreza RX from an EJ20 to an EJ25 Turbo (Maybe Twin Turbo) and im going to finish it off with a complete Kicker system! Im thinking 4 Kicker 15" L7 solos with lost of splits and amps
Posted 08 July 2012 - 09:14 PM
would a 2.5 ecu go into my rx?
#8
Adam
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Posted 08 July 2012 - 09:23 PM
There was a young bloke that put a 2.5 in his gx and he just swapped the motor. But I don't know what happened to it!
#9
93tzlegacy
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Posted 08 July 2012 - 09:38 PM
should be able to put a gen 3 RX ecu into a 98 on RX impreza, where are you located?
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#10
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Posted 08 July 2012 - 09:41 PM
2.5L are 8 bolt mount arent the 2L 4bolt? someone correct me if im wrong...
#11
Dizi86
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Currently converting a Subaru Impreza RX from an EJ20 to an EJ25 Turbo (Maybe Twin Turbo) and im going to finish it off with a complete Kicker system! Im thinking 4 Kicker 15" L7 solos with lost of splits and amps
Posted 08 July 2012 - 09:43 PM
Im in albury nsw
#12
Xon
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Posted 08 July 2012 - 10:26 PM
8 bolt block and a 4 bolt gearbox bolt together no problems.2.5L are 8 bolt mount arent the 2L 4bolt? someone correct me if im wrong...
I would have gone to the kitchen, collected a brown bag, dropped my dacks, pinched off a loaf in said bag, done up dacks, stickytaped bag, placed bag in envelope, and mailed it right to your face for being such a tool.
It's ok, sometimes when we herp, we also derp.
#13
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Posted 08 July 2012 - 10:32 PM
8 bolt block and a 4 bolt gearbox bolt together no problems.
Off memory one bolt is different the 4bolt had a stud to the starter on the 2.5L it didn't...
#14
Xon
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Posted 08 July 2012 - 10:41 PM
I believe its an issue using an 8 bolt box with a 4 bolt block, but you definitely don't have to do anything the other way around.
I would have gone to the kitchen, collected a brown bag, dropped my dacks, pinched off a loaf in said bag, done up dacks, stickytaped bag, placed bag in envelope, and mailed it right to your face for being such a tool.
It's ok, sometimes when we herp, we also derp.
#15
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Posted 09 July 2012 - 08:45 AM
Off memory one bolt is different the 4bolt had a stud to the starter on the 2.5L it didn't...
I believe its an issue using an 8 bolt box with a 4 bolt block, but you definitely don't have to do anything the other way around.
It's no issue. You tap a thread in the bolt hole and use a bolt. OR wind a stud in. OR drill the back of the bellhousing slightly to accept a bolt head and push it through from behind.
There's plenty of solutions.
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#16
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Posted 09 July 2012 - 09:14 AM
What kinda ej25 is it? The dohc one from the gen2 RX liberty or a sohc one from a gen3 liberty/outback/impreza rs ?
I wonder if he could use the ej25 long motor and all the ej20 manifold, sensors etc.
I wonder if he could use the ej25 long motor and all the ej20 manifold, sensors etc.
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#17
Xon
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Posted 09 July 2012 - 09:41 AM
Sorry, I didn't mean issue as in "shit, this thing ain't gunna fit", but rather it's more effort than just bolting everything back together the same way you took it apart.
It's no issue. You tap a thread in the bolt hole and use a bolt. OR wind a stud in. OR drill the back of the bellhousing slightly to accept a bolt head and push it through from behind.
There's plenty of solutions.
I would have gone to the kitchen, collected a brown bag, dropped my dacks, pinched off a loaf in said bag, done up dacks, stickytaped bag, placed bag in envelope, and mailed it right to your face for being such a tool.
It's ok, sometimes when we herp, we also derp.
#18
Dizi86
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Currently converting a Subaru Impreza RX from an EJ20 to an EJ25 Turbo (Maybe Twin Turbo) and im going to finish it off with a complete Kicker system! Im thinking 4 Kicker 15" L7 solos with lost of splits and amps
Posted 09 July 2012 - 10:01 AM
1998 SUBARU LIBERTY MOTOR. EJ25 ENGINE # 253090. Thats all the info i got i hope this helps
Oh and its a DOHC
Oh and its a DOHC
#19
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Posted 09 July 2012 - 10:02 AM
Sorry, I didn't mean issue as in "shit, this thing ain't gunna fit", but rather it's more effort than just bolting everything back together the same way you took it apart.
Yeah, all good my post was a bit blunt (pre-coffee on a monday blergh)
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#20
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Posted 09 July 2012 - 11:42 AM
1998 SUBARU LIBERTY MOTOR. EJ25 ENGINE # 253090. Thats all the info i got i hope this helps
Oh and its a DOHC
Frying pan into the fire mate.
That's a Gen2 RX motor, which are are well known for blowing head gaskets. If you were going to bother spending the time and money converting, go for a Gen3 varient. the last thing you want is for the "new" engine to pop not long after you've finished installing everything.
Just a thought... what happened to the EJ20? If it's just the head blown, wouldn't that be a cheaper, less intensive and more reliable fix?
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