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01-29-2013, 12:38 AM | #1 |
Scooby Specialist
Member#: 184505
Join Date: Jul 2008
Chapter/Region:
E. Canada
Location: Ontario
Vehicle:2003 WRX Sonic yellow |
SOHC EJ20 NA swap (ej25 replacement)
Hey fellas, I wanted to make a quick post on a recent swap I did over the holidays on a 2002 impreza wagon.
I picked up this car for my brother inlaw for a song and a dance. The car had 360k on the clock and had a solid body. After doing a tune up I notice the car had a miss and a real bad external oil leak at the head gaskets. Besides it needing a new clutch I thought about throwing in a new motor but couldn't find one worth trusting and rebuilding was out of the question. So I did some homework and found that Subaru had made a NA SOHC 2.0l in japan that made 10 less hp then a stock ej25. So I called up Japan direct and they had a few of these motors in stock with low miles that came out of a 2001 JDM forester. The plan was to swap all sensors, intake manifold, PS pump etc etc over and just use the long block. The great part about this is I had both motors side by side and while I was waiting on the flywheel to get back from the machine shop I literally unbolted the ej25 manifold and began swapping it over along with the crank and drivers side cam gear. What is good to note, the NA ej20 has the same duel port exhaust and because the motor only produces 10hp less there is no real issue being concerned over the size of the ej25 injectors. With everything completed and the car back up and running I can honestly say that I will never own or drive a ej25 NA ever again. When comparing the way the jdm 2.0l NA idles and runs to a 2.5 you would swear the 2.5 is a archaic tractor engine. I didn't take to many pictures of the swap but here is what I was able to come up with. The bottom cam gear is out of the jdm 2.0l, top cam gear is out of the 02 2.5l. These must be swapped out along with the crank gear. For those that are concerned about the lack tq in the 2.0l , yeah sure there is a small bit of difference but this motor is still more then capable of making a pass in 5th gear and still maintain hwy speeds while going through rolling hills without downshifting, and this is in a heavier GD chasis as well. I got this motor for far less then $1k and comes with a 90 warrentee This was a ridiculously easy swap from beginning to end and I highly recommend this as a affordable option for someone looking to replace a tired old ej25 tractor motor..... KCCO! |
02-10-2013, 09:59 AM | #2 |
Scooby Newbie
Member#: 245962
Join Date: May 2010
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good call on the cam gear swaps. Its amazing how many people overlook this, then car runs like crap and think that they have a bad motor
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02-14-2013, 10:24 AM | #3 |
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Member#: 197302
Join Date: Dec 2008
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I see these things all over ebay. So if I want to swap my tired 2.2 in my '98 L wagon for this, all that is needed is what you've stated here (and in my case, exhaust to accomodate the dual ex port)? Do these 2.0 engines get better mpg than the 2.2l? Are they as durable as the 2.2's?
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02-15-2013, 08:20 PM | #4 |
Scooby Guru
Member#: 4562
Join Date: Feb 2001
Chapter/Region:
NWIC
Location: Auburn, WA
Vehicle:2014 Electric Datsun 2005 Adventure van |
Hmmmm
Never gave these engines much though, but the price is definitely right (and would still be a huge improvement in my VW) |
02-27-2013, 04:42 PM | #5 |
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Member#: 215017
Join Date: Jun 2009
Chapter/Region:
NWIC
Location: Redmond WA
Vehicle:97OB 2004 civic :-) |
Does it throw any codes? Does it have EGR?
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03-04-2013, 01:29 PM | #6 |
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Member#: 349025
Join Date: Mar 2013
Chapter/Region:
Tri-State
Vehicle:2009 Forester 2.5 X Black |
nice choice, you gonna mod the 2.0?
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03-05-2013, 11:02 PM | #7 |
Scooby Specialist
Member#: 184505
Join Date: Jul 2008
Chapter/Region:
E. Canada
Location: Ontario
Vehicle:2003 WRX Sonic yellow |
No codes and no egr.
I took the car for a nice little drive with mixed speeds to get it ready for an emission test. I averaged speeds from 60-90km/h I averaged 27mpg and that was in hilly terrain, winter tires and -15c weather. I will keep you posted on the mileage when the spring weather hits. |
03-06-2013, 11:21 PM | #8 |
Scooby Specialist
Member#: 104098
Join Date: Jan 2006
Chapter/Region:
NWIC
Location: Eastern WA
Vehicle:97' LGT 2.3 Dstroke Rotated BW S256 6speed |
What about valve cover gaskets or other things needed when the time comes? Does it share the same gaskets as the SOHC 2.5? I know sourcing parts was kind of a PITA with my old EJ20G.
I'm really thinking about one of these in my 99' Forester I picked up with a spun bearing. I have an importer local to me with these for $1000. That is way cheaper and easier to find than a 2.5. Also with 4.44 gears and a 5-speed, I bet it wouldn't be too sluggish down low. Any more info or impressions would be cool! |
03-07-2013, 01:07 AM | #9 |
Scooby Specialist
Member#: 74907
Join Date: Nov 2004
Chapter/Region:
NWIC
Location: salem, OR
Vehicle:98 cam'd EJ251 Wrx Tranny,slowr than ish |
I bet it uses the same or very similar cams to the other phase II sohc engines as well. Now I am having thoughts of swapping forged piston meant for the wrx 2.0L into these engines and boosting the crap out of them.
Is the compression ratio at 10:1 like the 251/3 as well? Time for interweb search... I do find the 10 less HP figured slightly weird, how can you drop 20% displacement and lose only 10 hp...? ~Josh~ |
03-07-2013, 01:56 PM | #10 |
Scooby Specialist
Member#: 104098
Join Date: Jan 2006
Chapter/Region:
NWIC
Location: Eastern WA
Vehicle:97' LGT 2.3 Dstroke Rotated BW S256 6speed |
^^^^The real question is the torque output difference. I searched all over the internet and couldn't find any real info on these. Most searches give you importers selling them, but nothing about actual factory specs / power figures.
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03-11-2013, 04:48 PM | #11 | ||
Scooby Specialist
Member#: 184505
Join Date: Jul 2008
Chapter/Region:
E. Canada
Location: Ontario
Vehicle:2003 WRX Sonic yellow |
Quote:
These motors are going for a bit less then that up here... Quote:
Specifications Displacement: 1,994 cc Bore: 92.0 mm Stroke: 75.0 mm EJ20E SOHC naturally aspirated Legacy JDM 1989-1994 125 PS (92 kW) BC - BF series 1993-1999 135 PS (99 kW) BD - BG series( ECU code EURO 3G,D3 ; Asia 4H) 1998-2004 155 PS (114 kW) BE - BH series( ECU code EURO 3G,D3 ; Asia 4H) 2003-2009 140 PS (103 kW) BL - BP series This motor was built in 01. And why do you find it so hard to believe the hp number? How does a jdm 2.0l STi make more power then the usdm 2.5? Also there was a DOHC naturally aspirated 2.0l that you could get in a JDM legacy that was making 190hp back in 2003. And now 10 years later the BRZ has the same numbers. It's clear that this motor does not produce the same tq figures but I can say that it's not that bad. I am still shocked on how smooth this motor is compared to the 2.5l |
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03-22-2015, 02:08 AM | #12 | |
Scooby Newbie
Member#: 303920
Join Date: Dec 2011
Location: CA
Vehicle:2015 Sedan CWP |
Quote:
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01-17-2016, 04:20 PM | #13 | |
Scooby Specialist
Member#: 216984
Join Date: Jul 2009
Chapter/Region:
NWIC
Location: Coeur D Alene, ID
Vehicle:1996 Impreza outback Green |
Quote:
If you can not find a jdm importer who sells gasket kits, then call Cometic and tell them you need a head gasket pair for a usdm wrx ej205 turbo engine but in what ever thickness the stock ej20 sohc na engine comes with (will have to measure the thickness of the ej20 sohc head gasket to confirm). The coolant ports match perfectly as does the bore of the gasket between both engines. |
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03-08-2013, 12:07 PM | #14 | |
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Member#: 154586
Join Date: Jul 2007
Chapter/Region:
BAIC
Location: San Ramon
Vehicle:1996 Turbo Outback 9psi on 91 No EM |
Quote:
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08-08-2013, 09:50 PM | #15 |
Scooby Newbie
Member#: 364832
Join Date: Aug 2013
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99 forester 2.5 sohc to jdm na 2.0 sohc
Hi,I liked your post, I did the same thing with a 99 forester and it wont fire up, any ideas or help would be awsome
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08-08-2013, 09:56 PM | #16 |
Scooby Newbie
Member#: 364832
Join Date: Aug 2013
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Hi,I liked your post, I did the same thing with a 99 forester and it wont fire up, any ideas or help would be awsome
Last edited by 99foresterawd; 08-09-2013 at 12:15 AM. |
10-24-2016, 04:29 PM | #17 | |
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Member#: 456637
Join Date: Oct 2016
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Quote:
I am looking at doing this to my 99 forester L with an EJ253AXZVB. Will this work for me too like the above? I can get one for 799.99 locally with Warranty. Will this work the same on a AT (TZ1A3ZC2AA?) Does this use the same timing belt kit as a EJ253? Or do I need to find a different kit. I don't care about torque loss, I want a reliable vehicle. A replacement EJ253 was over quoted over 4,000.00 installed, Motor alone was 1950.00. |
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06-17-2015, 11:47 AM | #18 |
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Member#: 387455
Join Date: Apr 2014
Chapter/Region:
E. Canada
Location: Ottawa
Vehicle:2010 STI Hatch Satin White Pearl |
This is using the original EJ25 ECU right? interested in this for my '02 legacy, but it would need to pass e-test eventually so the proper sensors all need to be responding to pass the new OBDII scanning e-test.
Last edited by jonoc4; 06-17-2015 at 11:55 AM. |
11-06-2015, 04:39 AM | #19 |
Scooby Newbie
Member#: 433525
Join Date: Nov 2015
Vehicle:2005 Impreza 2.5 rs |
EJ25 to EJ20 swap
Thinking of doing the same thing, except I don't have a garage to work on... Any idea how much a shop would charge to install a used engine?
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01-17-2016, 04:15 PM | #20 |
Scooby Specialist
Member#: 216984
Join Date: Jul 2009
Chapter/Region:
NWIC
Location: Coeur D Alene, ID
Vehicle:1996 Impreza outback Green |
Not sure if you are still looking to do this, but getting in touch with the local subaru crowd and facebook group or groups will help you get going in the right direction.
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01-18-2016, 03:02 PM | #21 |
Scooby Newbie
Member#: 433525
Join Date: Nov 2015
Vehicle:2005 Impreza 2.5 rs |
Got my Hg replaced!
I got my Hg's replaced instead, importer was asking for $1100, with 1 month guarantee. So I decided to rent a garage instead. Maybe next time I'll try a swap. (Hope not in the near future though) Nice write up though...
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02-02-2016, 09:39 PM | #22 |
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Join Date: Feb 2016
Chapter/Region:
MWSOC
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Plan to do this in a couple of weeks
I plan to do this swap in a couple of weeks since my ej25 in my 02 subaru legacy jumped timing and the valves kissed my piston heads. I originally planned on just putting new heads on and rebuilding the motor, but ran into other complications. One quick question that i have is that did you have an issue with the ECM?
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02-17-2016, 10:50 AM | #23 |
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Member#: 421433
Join Date: May 2015
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Hi, I recently have done this Motor change to My GF8 from the original 2.2 car has been running great. The only thing I seem to have not done was the switching of the cam Gears. How will this affect my motor? I have been driving my Car as a DD for about 2 months and have noticed Notjing differently Should I buy new cam gears and have them Relaced? Thanks Guys!
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05-04-2016, 06:47 PM | #24 |
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Member#: 446209
Join Date: May 2016
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i did the swap the person i got the motor from said to just swap the sensors so i did and the car wouldnt fire unfortunatly i had everything together ... so i had to remove the radiator and timing cover i swapped the cam gears then forgot the crank gear it got closer to starting so i knew i had to take it back out of time and replace the crank gear did that then had to fix the timing again and now have a happy healthy ej20 with 65k my wagon has 154xxx on the body im so happy to have the car running ive only had the car to about 80mph so far it felt good thanks to this thread i was able to finish up all that i had to do.
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07-23-2016, 10:49 PM | #25 |
Scooby Specialist
Member#: 184505
Join Date: Jul 2008
Chapter/Region:
E. Canada
Location: Ontario
Vehicle:2003 WRX Sonic yellow |
Man I'm glad this thread has helped out for a few members!!
Btw my brother inlaws motor is still running like a top to this day |
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