Welcome to the North American Subaru Impreza Owners Club Wednesday March 4, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Pre-2002 Factory Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 09-05-2010, 01:40 PM   #1
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default Early EJ20 JDM to USDM WRX internal parts interchangeability

I'm looking into doing a swap with a early (94 to 96) EJ20 JDM WRX,
does anyone know how interchangeable internal parts are with a USDM WRX?
I'm curious if there's alternatives to the expensive and limited dealer lists, and resorting to euro parts sources. Can major internals like cranks, rods and pistons/rings fit between the two?
* Registered users of the site do not see these ads.
drumzzzzz is offline   Reply With Quote
Old 09-06-2010, 12:45 AM   #2
quikcobra
Scooby Newbie
 
Member#: 175246
Join Date: Mar 2008
Location: Orlando FL.
Vehicle:
2002 WRX

Default

Yes thei will interchange buy why? You will not benefit what so ever. There are very cheap rotating assemblies for these cars now. So its better to just take the dive for the good stuff.
quikcobra is offline   Reply With Quote
Old 09-06-2010, 02:08 AM   #3
69subaru360
Scooby Guru
 
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

Quote:
Originally Posted by quikcobra View Post
Yes thei will interchange buy why? You will not benefit what so ever. There are very cheap rotating assemblies for these cars now. So its better to just take the dive for the good stuff.
No, not true. Cranks are not the same #3 vs. #5 thrust. Rods are the same. Pistons are not the same. The crown is different shaped, compresson ratio is different, deck height is different. Bearings are the same.
69subaru360 is offline   Reply With Quote
Old 09-06-2010, 10:59 AM   #4
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default

thanks, that's what I need to know, aside from rods there isn't any interchangeability.
drumzzzzz is offline   Reply With Quote
Old 09-06-2010, 11:37 AM   #5
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

If you ever need a crank, any Ej18 or Ej22 phase I crank is identical to your Ej20G crank.
Matt Monson is offline   Reply With Quote
Old 09-06-2010, 12:43 PM   #6
Cbgrandtheftauto
Scooby Specialist
 
Member#: 184977
Join Date: Jul 2008
Chapter/Region: South East
Location: TN
Vehicle:
99 Impreza RS
'13 BRZ

Default

Quote:
Originally Posted by 69subaru360 View Post
No, not true. Cranks are not the same #3 vs. #5 thrust. Rods are the same. Pistons are not the same. The crown is different shaped, compresson ratio is different, deck height is different. Bearings are the same.
wasn't the phase 1 rods a 48mm journal??
Cbgrandtheftauto is offline   Reply With Quote
Old 09-06-2010, 01:00 PM   #7
RallyColtTurbo
Scooby Specialist
 
Member#: 16819
Join Date: Mar 2002
Chapter/Region: SCIC
Location: Lake Elsinore, CA
Vehicle:
2002 MBP WRX,'06 LR3
Three Gen 1 Legacy Turbos

Default

Quote:
Originally Posted by Cbgrandtheftauto View Post
wasn't the phase 1 rods a 48mm journal??
Only the phase 1 EJ25s.
RallyColtTurbo is offline   Reply With Quote
Old 09-06-2010, 03:15 PM   #8
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default

Ah - if the 18 and 22 cranks fit, then the bearings sets must be identical.
I thought I read somewhere that the 1998 2.5 rs gasket kits are very close to
the ej20's as well, has any one used one of these for a rebuild?
it's beginning to seem the JDM's might not be to hard to source parts for
drumzzzzz is offline   Reply With Quote
Old 09-06-2010, 03:52 PM   #9
69subaru360
Scooby Guru
 
Member#: 159682
Join Date: Sep 2007
Chapter/Region: NESIC
Location: Maine
Vehicle:
1995 WRX
1998 2.5 RS

Default

Quote:
Originally Posted by drumzzzzz View Post
Ah - if the 18 and 22 cranks fit, then the bearings sets must be identical.
I thought I read somewhere that the 1998 2.5 rs gasket kits are very close to
the ej20's as well, has any one used one of these for a rebuild?
it's beginning to seem the JDM's might not be to hard to source parts for
All subaru EJ engines except the phase 1 EJ25D take the same bearings. For EJ20G gaskets, most of the gaskets for a 96 EJ25D will work except the head gaskets, you need EJ20G head gaskets. I think you can actually order the EJ20G head gaskets at US dealers now, the number is in the system. It's not really hard to get parts for an EJ20G.
69subaru360 is offline   Reply With Quote
Old 09-06-2010, 07:49 PM   #10
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default

Does a 96 EJ25D full gasket kit does it even fit the valve covers and lower end gaskets/seals too?
This should definitely helps things, could pretty much order everything as a kit then.
drumzzzzz is offline   Reply With Quote
Old 09-06-2010, 09:13 PM   #11
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

Scroll down the page a bit and find the Ej20G/Ej20K parts compatibility thread. It's worth reading the whole thing. Pretty much everything you could ever need for your engine is available from another model, with few exceptions.
Matt Monson is offline   Reply With Quote
Old 09-06-2010, 09:50 PM   #12
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default

Checked out the parts lists, very handy; had just a couple of concerns with a few missing parts. Knowing that 96 gasket kits mostly fit makes it easier too. Learning just how interchangeable these engines are; Legos inside and out
drumzzzzz is offline   Reply With Quote
Old 09-07-2010, 02:43 AM   #13
Marnix
Scooby Specialist
 
Member#: 51480
Join Date: Dec 2003
Chapter/Region: International
Location: The Netherlands
Vehicle:
1984 AM5, 1994 BC4,
2010 BR5

Default

Yes, Lego. But only cross match parts or gaskets with correct model years! The 1996 USDM EJ25D valve cover gaskets only fit EJ20G engines 1992-1996; for 1997-1998 you need the 1997-1998 USDM EJ25D gaskets. Really easy once you know, really easy to make mistakes if you don't know.
Marnix is offline   Reply With Quote
Old 09-07-2010, 10:55 AM   #14
TommyAtomic
Scooby Newbie
 
Member#: 257043
Join Date: Sep 2010
Chapter/Region: VIC
Location: Vancouver BC
Vehicle:
1993 JDM WRX Wagon
Black

Default

Quote:
Originally Posted by Marnix View Post
Yes, Lego. But only cross match parts or gaskets with correct model years! The 1996 USDM EJ25D valve cover gaskets only fit EJ20G engines 1992-1996; for 1997-1998 you need the 1997-1998 USDM EJ25D gaskets. Really easy once you know, really easy to make mistakes if you don't know.
Marnix:

I am somewhat in the same boat having just bought a 93 jdm wrx wagon in need of a new waterpump

I bought it for $3500CAD and all it needs is a waterpump. I believe the previous owner couldnt find a shop willing to replace it for less than what he sold me the car for.

As the saying goes as long as I'm replacing the waterpump I might was well do the timing belt. I found some lovely but useless kits on ebay that I wisely chose not to buy.

After using the search button quite a bit I discovered to replicate the parts in the ebay USDM timing/waterpump kits I need :

Timing Belt and Timing gear from 93-96 legacy 2.5l ?
Tensioner from 93-96 legacy 2.5l
Water Pump from 02 WRX
Cam Seal from 93-96 legacy 2.5l

I though I would doublecheck my information is this all correct?
Also I need to know what USDM year and model I should be getting the

Front seal ?
Idlers ?

Little help would be appreciated. Much thanks in advance.
TommyAtomic is offline   Reply With Quote
Old 09-08-2010, 07:24 AM   #15
Marnix
Scooby Specialist
 
Member#: 51480
Join Date: Dec 2003
Chapter/Region: International
Location: The Netherlands
Vehicle:
1984 AM5, 1994 BC4,
2010 BR5

Default

Yes.... Front seal and idlers also contemporary USDM EJ25D.
Marnix is offline   Reply With Quote
Old 09-08-2010, 10:09 AM   #16
TommyAtomic
Scooby Newbie
 
Member#: 257043
Join Date: Sep 2010
Chapter/Region: VIC
Location: Vancouver BC
Vehicle:
1993 JDM WRX Wagon
Black

Default

Thanks. It seems surprising that there isnt an EJ20G faq with a parts list but I suppose once you jump through the hoops the first couple of times its probably a no brainer.
TommyAtomic is offline   Reply With Quote
Old 09-21-2010, 02:24 PM   #17
aps_sti1
Scooby Newbie
 
Member#: 208837
Join Date: Apr 2009
Chapter/Region: MAIC
Location: Baltimore
Vehicle:
2002 WRX
Black

Default

WOw this thread saved the day. I was just sitting here wondering If Ej20G and 205 bearing were the same I need some ACLs for my 94 WRX bottem end. Will the JDM bottem end run with my 205 heads and a UTEC stage 4 map w/ a vf3x of course? And Let me try n get this correct before I **** up, Ej20g's have 52mm rod jornal size?
aps_sti1 is offline   Reply With Quote
Old 09-21-2010, 03:08 PM   #18
Marnix
Scooby Specialist
 
Member#: 51480
Join Date: Dec 2003
Chapter/Region: International
Location: The Netherlands
Vehicle:
1984 AM5, 1994 BC4,
2010 BR5

Default

Each and every EJ20 left the factory with 52mm rod bearings. The change in main bearings from thrust bearing #3 to #5 was done mid 1998.
Marnix is offline   Reply With Quote
Old 09-21-2010, 03:09 PM   #19
Matt Monson
Scooby Guru
 
Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

Quote:
Originally Posted by TommyAtomic View Post
Thanks. It seems surprising that there isnt an EJ20G faq with a parts list but I suppose once you jump through the hoops the first couple of times its probably a no brainer.
There is a thread that serves as a FAQ but since this is pretty much an unmoderated forum it's never been stickied like it should be.
Matt Monson is offline   Reply With Quote
Old 10-05-2010, 08:57 PM   #20
WMP
Scooby Newbie
 
Member#: 30625
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: CT
Default

Quote:
Originally Posted by Matt Monson View Post
Scroll down the page a bit and find the Ej20G/Ej20K parts compatibility thread. It's worth reading the whole thing. Pretty much everything you could ever need for your engine is available from another model, with few exceptions.
Would you mind linking us Matt? Thanks so much. Also, would you happen to know off-hand if it's possible to use EJ205 cams/springs/retainers in an EJ20K head? We want to get some Brian Crower stuff for our race car. Thanks so much!
WMP is offline   Reply With Quote
Old 10-06-2010, 04:48 AM   #21
Marnix
Scooby Specialist
 
Member#: 51480
Join Date: Dec 2003
Chapter/Region: International
Location: The Netherlands
Vehicle:
1984 AM5, 1994 BC4,
2010 BR5

Default

Yes you can use EJ25D springs, valves/cams/retainers in an EJ20K head, casting is (almost) the same.
Marnix is offline   Reply With Quote
Old 10-06-2010, 11:19 AM   #22
WMP
Scooby Newbie
 
Member#: 30625
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: CT
Default

Quote:
Originally Posted by Marnix View Post
Yes you can use EJ25D springs, valves/cams/retainers in an EJ20K head, casting is (almost) the same.
Hi Marnix, many thanks for the reply. How about EJ205 valvetrain components? Suberdave says no. Cheers!


http://forums.nasioc.com/forums/show...2&postcount=30


Quote:
Originally Posted by suberdave View Post
NO

phase II cams are different that Phase I cams...

-=Suberdave=-
WMP is offline   Reply With Quote
Old 10-17-2010, 09:56 PM   #23
drumzzzzz
Scooby Newbie
 
Member#: 157994
Join Date: Aug 2007
Location: WI
Vehicle:
2003 WRX
Sedona Red

Default ARCO piston rings - cheap alternative to OEM?

anyone have experience with ARCO piston rings for EJ's?
I Found them here:
http://cgi.ebay.co.uk/Subaru-Impreza...item3f03315b59
Appears this is the manufacturer: http://www.arcomotor.com/profile/index.php
Might be an alternative to expensive OEM parts dealers, curious if this might be the actual OEM manufacturer?

*Update*
I got the manufacturers catalog, and it "appears" the piston and rings are identical after measuring the old ones.

I'm going to order a set next week and will report back when they get here.
for anyone who would like the catalog it is upped here: http://www.mediafire.com/?ee5w00d9s2lmjj2
There are several pages of Subaru piston/ring sets,
this may be a viable alternative to expensive OEM's!

Last edited by drumzzzzz; 10-21-2010 at 01:24 PM.
drumzzzzz is offline   Reply With Quote
Old 10-20-2010, 02:55 PM   #24
wagonryan
Scooby Specialist
 
Member#: 163756
Join Date: Nov 2007
Location: Oregon
Vehicle:
1996 R/RA

Default

this thread should be sticky'd
wagonryan is offline   Reply With Quote
Old 10-23-2010, 01:58 PM   #25
aps_sti1
Scooby Newbie
 
Member#: 208837
Join Date: Apr 2009
Chapter/Region: MAIC
Location: Baltimore
Vehicle:
2002 WRX
Black

Default

Got on Japanparts.com and surprisingly they have damn cheap EJ20G parts. Pistons and all kind of goodies for next to nothing. Im wondering if anyone knows of a site for the actual Measurements of these engines? Wik doesnt have ****. I need to know the deck heights some1 told me to check them before I put my 205 heads on the 20G block. Just trying to double check. Also what can I do with this Elbow on the JDM turbo to run it on my 02 WRX. I was thinkin Of Just leavin the inlet open and setting in my Airbox even tho it wont b ran to the turbo. It should still help pull lower colder air? I have the JDM Head Sheild I plan to use but I want to use this turbo.
aps_sti1 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
early 90's jdm legacy/liberty/RS turbo parts? <Taiwan/Asian Pacific> brodie.gordon International Forum 0 05-14-2010 01:04 AM
JDM v7 Passenger Seat swap on to USDM wrx driver base dan avoN7 Interior & Exterior Modification 7 09-02-2006 09:08 PM
JDM STI V7 Comparsion to USDM WRX PumpsGOTAWD Electrical & Lighting 1 03-07-2004 02:51 PM
will axelback for JDM STi bolt up to USDM WRX? silverF4turbo Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 3 06-04-2003 02:42 AM
VERY IMPORTANT! What EJ20 Series in USDM WRX? BADWRX Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 6 11-21-2001 08:40 PM


All times are GMT -4. The time now is 12:27 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.