Subaru Engine Designations

[Steve B]

Is anyone brave enough to list the various Subaru engine desginations? All I know is there was an early 1600 pushrod motor, then an 1.8 liter belt driven sohc engibne like the one in my trusty '87. I know there was a 2.2 liter engine too. Now I have the 2006 2.5 liter motor in a new Outback. Is that the EJ22 engine? Anybody know this stuff? Any notorious bad stuff to look out for for the 2.5?

[nipper]

Is anyone brave enough to list the various Subaru engine desginations? All I know is there was an early 1600 pushrod motor, then an 1.8 liter belt driven sohc engibne like the one in my trusty '87. I know there was a 2.2 liter engine too. Now I have the 2006 2.5 liter motor in a new Outback. Is that the EJ22 engine? Anybody know this stuff? Any notorious bad stuff to look out for for the 2.5?

 

its a Ej25 i beleive. In a 2006? i doubt it as they have not been around long enough to find out. i know the 6cyl looks like it is developing a tensioner issue, but havent heard anything about the 06 fours.

 

nipper

[Steve B]

I guess head gasket trouble seems common to the 2.2 and 2.5 liter engines. My old 1.8 liter engine went over 200,000 before I had a blown head gasket that I "repaired" with a block sealer product. I wonder if the 2005/2006 engines have had this trouble surface yet?

[jamal]

The early ones were EAs. Everything new is an EJ. The next two numbers are the displacement. ER27, EG33, and EZ30 are the 6-cylinders. Then there are a bunch of variations of each. I don't really know what they all are, but basically, the EJ201 is like the first variation of the 2.0. The 05 WRX had a EJ207 I think. Anyway they work kind of like that and you have to get into the next few numbers/vin to figure out exactly what came from what, etc.

 

This page has a table. And messed up formatting at the top or something.

http://www.scoobymods.com/forums/showthread.php?t=20

[Olnick]

I guess head gasket trouble seems common to the 2.2 and 2.5 liter engines.

 

Not quite true. 2.5s have certainly had more than their share of headgasket problems. It's a rarity in the 2.2 however. That's why many of us consider the "bulletproof" 2.2 to be the best engine Subaru ever built!

[Dr. RX]

The early ones were EAs. Everything new is an EJ. The next two numbers are the displacement. ER27, EG33, and EZ30 are the 6-cylinders. Then there are a bunch of variations of each. I don't really know what they all are, but basically, the EJ201 is like the first variation of the 2.0. The 05 WRX had a EJ207 I think. Anyway they work kind of like that and you have to get into the next few numbers/vin to figure out exactly what came from what, etc.

 

This page has a table. And messed up formatting at the top or something.

http://www.scoobymods.com/forums/showthread.php?t=20

 

There are a couple of things wrong with that chart, by that chart there were no EJ22 built in 94, it shows a 1600 cc engine built from 80 to 82 and 83 to 87 as an EA81, it would be an EA71, and it shows a 1500 cc built from 85 to 89, the horse power and torque would indicate a 1600 cc engine and the fact that it is in a 2dr would lead me to believe it is in a Hatchback, that would make that an EA71 also. I believe that prior to the XT6 and Justy, the numbers after the letters were the piston diameter in mm's. Although the EA81 and EA82 share the same size pistons, they may have used that 82 to differentiate between the OHV and OHC engines.

 

Prior to 97, the EJ20's had letters at the end to tell what type of engine it was, ie the EJ20 was a DOHC turbocharged engine, after 97 the EJ205 and EJ207 were DOHC turbocharged engines. The engine it the famous 22B was an EJ22G, a DOHC 2200 cc turbocharged engine. The current turbocharged engines are EJ257s.

[Subie Gal]

The current turbocharged engines are EJ257s.

 

actually nope...

 

sti = EJ257

 

Legacy, impreza, forester = EJ255

 

 

Jamie

[idosubaru]

the 2.2's definitely don't have head gasket problems. being around longer (since they came out well before the 2.5's) you'll see some 2.2's with issues more related to age and maintenance than design.

 

EJ refers to newer motors. the numbering is the size of the engine. EJ22 is 2.2 liter, EJ25 is 2.5 liter, etc. there are variations among them as mentioned.

 

subaru came out with a "new" head gasket design that your engine surely has, doubt you'll have any trouble with it.

[Dr. RX]

actually nope...

 

sti = EJ257

 

Legacy, impreza, forester = EJ255

 

 

Jamie

Thanks Jamie, that figures, the only engine that I hear people talking about is the EJ257 as if that is the only engine. Since most of those people that I talk with are into performance, I guess the EJ257 would be their engine of choice.

[DerFahrer]

This is the list as best I know. Someone more qualified than me may correct me, but if you don't know for SURE, don't just throw something out there.

 

I got the EA63 and EF12 from the Scoobymods list, as I didn't previously have those.

 

USDM Subaru Engine Codes

OHV 1.4L 4cyl ----------------------------------EA63

OHV 1.6L 4cyl ---------------------------------- EA71

OHV 1.8L 4cyl ---------------------------------- EA81

OHV 1.8L 4cyl Turbo ------------------------- EA81T

SOHC 1.8L 4cyl ------------------------------- EA82E

SOHC 1.8L 4cyl Turbo ---------------------- EA82T

SOHC 1.2L 3cyl ----------------------------- EF12

SOHC 2.7L 6cyl ------------------------------- ER27E

SOHC 2.2L 4cyl (90-96) -------------------- EJ22E

SOHC 2.2L 4cyl Turbo ---------------------- EJ22T

SOHC 3.3L 6cyl ------------------------------- EG33D

SOHC 1.8L 4cyl ------------------------------- EJ18E

DOHC 2.5L 4cyl ------------------------------- EJ25D

SOHC 2.2L 4cyl (97-01) -------------------- EJ22EZ

SOHC 2.5L 4cyl (99-04) -------------------- EJ251

DOHC 3.0L 6cyl ------------------------------- EZ30D

DOHC 2.0L 4cyl Turbo ---------------------- EJ205

DOHC 2.5L 4cyl Turbo (STi) -------------- EJ257

DOHC 2.5L 4cyl Turbo ---------------------- EJ255

SOHC 2.5L 4cyl (05-Present) ------------- EJ253

 

EDIT: Stupid IE!

[ericem]

They sure had alot of engines, but just wondering sort of a noob question but how do i know if the headgasket is blown?

[DerFahrer]

Please search, Eric. There are thousands of threads on this board dealing with that. Please ask your question in those threads.

[Dr. RX]

This is the list as best I know. Someone more qualified than me may correct me, but if you don't know for SURE, don't just throw something out there.

 

I got the EA63 and EF12 from the Scoobymods list, as I didn't previously have those.

 

USDM Subaru Engine Codes

OHV 1.4L 4cyl ----------------------------------EA63

OHV 1.6L 4cyl ---------------------------------- EA71

OHV 1.8L 4cyl ---------------------------------- EA81

OHV 1.8L 4cyl Turbo ------------------------- EA81T

SOHC 1.8L 4cyl ------------------------------- EA82E

SOHC 1.8L 4cyl Turbo ---------------------- EA82T

SOHC 1.2L 3cyl ----------------------------- EF12

SOHC 2.7L 6cyl ------------------------------- ER27E

SOHC 2.2L 4cyl (90-96) -------------------- EJ22E

SOHC 2.2L 4cyl Turbo ---------------------- EJ22T

SOHC 3.3L 6cyl ------------------------------- EG33D

SOHC 1.8L 4cyl ------------------------------- EJ18E

DOHC 2.5L 4cyl ------------------------------- EJ25D

SOHC 2.2L 4cyl (97-01) -------------------- EJ22EZ

SOHC 2.5L 4cyl (99-04) -------------------- EJ251

DOHC 3.0L 6cyl ------------------------------- EZ30D

DOHC 2.0L 4cyl Turbo ---------------------- EJ205

DOHC 2.5L 4cyl Turbo (STi) -------------- EJ257

DOHC 2.5L 4cyl Turbo ---------------------- EJ255

SOHC 2.5L 4cyl (05-Present) ------------- EJ253

 

EDIT: Stupid IE!

Only thing I would add is that there are many 2.0 liter turbo engine numbers, EJ20G, EJ20K, EJ205, and EJ207. Great list.

[blitz]

Bore / Stroke / Displacement - first in metric then in cubic inches.

 

 

--------------------------------

 

Four-Cylinder Subaru Engines

 

--------------------------------

 

{2.835 / 2.362 / 59.6} - {72 / 60 / 977}

These are EA-52 engines used in 1966-1970 Subaru automobiles.

 

 

 

{2.992 / 2.362 / 66.4} - {76 / 60 / 1089}

These are EA-61 engines used in 1969-1971 Subaru automobiles.

 

 

 

{3.346 / 2.362 / 83.1} - {85 / 60 / 1362}

These are EA-63 engines used in 1978-1980 Brats and 1977-1989 sedans.

 

 

 

{3.622 / 2.362 / 97.4} - {92 / 60 / 1595}

These are EA-71 engines used in 1975-1976 sedans.

 

 

 

{3.622 / 2.638 / 108.7} - {92 / 67 / 1782}

These are EA-81 and/or EA-82 engines used in 1980-1989 Brats, 1985-1991 XT coupes, and 1980-1999 sedans. They have the same bore and stroke as the six-cylinder ER-27.

 

 

 

{3.461 / 2.953 / 111.1} - {87.9 / 75 / 1820}

These are EJ-18 engines used in 1989-1996 Impreza models.

 

 

 

{3.622 / 2.953 / 121.7} - {92 / 75 / 1994}

These are EJ-20WRX engines are used in 2002-present WRX sedans.

 

 

 

{3.815 / 2.953 / 135.0} - {96.9 / 75 / 2212}

These are EJ-22 engines used in 1990-1994 Legacy models and the 1999-2001 Impreza. They have the same bore and stroke as the six-cylinder EG-33.

 

 

 

{3.917 / 3.110 / 149.9} - {99.5 / 79 / 2457}

These are EJ-25 engines used in 1999-present Forester, Impreza RS, Legacy, and Outback models; 2001-present SUS models; and 2003-present Baja models.

 

---------------------------------------

 

Six-Cylinder Subaru Engines

 

---------------------------------------

 

{3.622 / 2.638 / 163.1} - {92 / 67 / 2672}

These are ER-27 engines used in 1988-1991 XT sports coupe. They have the same bore and stroke as the four-cylinder EA-81 and EA-82.

 

 

 

{3.512 / 3.150 / 183.1} - {89.2 / 80 / 3000}

These are the EZ-30 engines used in 2001-present Legacy and Outback models; also known as the H6-30 engine.

 

 

 

{3.815 / 2.953 / 202.5} - {96.9 / 75 / 3319}

These are the EG-33 engines used in 1991-1997 SVX sports coupe. They have the same bore and stroke as the four-cylinder EJ-22

__________________

 

**** ******!

[DerFahrer]

Only thing I would add is that there are many 2.0 liter turbo engine numbers, EJ20G, EJ20K, EJ205, and EJ207. Great list.

 

I dunno the other EJ20 engine codes too well, so I limited it to the USDM ones.

 

The EJ204 is the N/A one with the sweet-looking intake manifold right?

[Dr. RX]

I dunno the other EJ20 engine codes too well, so I limited it to the USDM ones.

 

The EJ204 is the N/A one with the sweet-looking intake manifold right?

Sorry, I'm a turbo freak, I've never seen an EJ20 N/A engine, but I do know that they are out there.

[DerFahrer]

Yeah, they're out there. They make 150hp stock, out of a 2.0 NA, which isn't too shabby. The intake manifold in question has variable-length runners, so it's a very interesting looking piece. I can't find a pic though...

[rverdoold]

Yeah, they're out there. They make 150hp stock, out of a 2.0 NA, which isn't too shabby. The intake manifold in question has variable-length runners, so it's a very interesting looking piece. I can't find a pic though...

 

Isn't that the normal 2.0 for europe. Put in the the early '90-'96 legacy's.

I own a European Legacy 2.0 know as a EJ20 although it makes 116hp on my registration form.

[DerFahrer]

Isn't that the normal 2.0 for europe. Put in the the early '90-'96 legacy's.

I own a European Legacy 2.0 know as a EJ20 although it makes 116hp on my registration form.

 

You're right, I should have been more thorough. The EJ20 N/A has been around since the EJ22 has in the US, and has been available in many different variations.

 

But the one in yours is not an EJ204. The EJ204 I spoke of is Japan-only, I believe, in some Imprezas.

[snowsubie]

Hi all,

just got my 96 outback EJ22 replaced with a 98 Legacy EJ22. Original engine died at 260,000 mi.

 

I guess this means i had the SOHC 2.2L 4cyl (90-96) - EJ22E, and

 

now have the SOHC 2.2L 4cyl (97-01) - EJ22EZ

 

What's the difference? (besides the "z")

[Kostamojen]

Sorry to bump this, but im working on a more complete/accurate list of US subaru motors. I need a hand with the engine codes though, check and see if you see any errors (sorry for the formating, its an excell file changed to a .txt):

 

X Displacement Engine code Horsepower (HP @ rpms) Torque (ft lbs @ rpms) Compression Features Years Models

CC 356cc 2cyl EA52 25 @ 5500 25 @ 6.7:1 Air cooled 1966-70 360

0 1100 EA61 62 @ 6000 63 @ 3200 9.0:1 2bbl 1970-71 FF-1

1 1300 EA62 80 @ 6400 73 @ 4000 9.0:1 2bbl 1971 1300G

1A 1300 EA62 61 @ 5600 65 @ 4500 9.0:1 2bbl 1972 1300G

2 1400 EA63A 61 @ 5600 69 @ 3600 9.0:1 2bbl 1973-74

2A 1400 EA63E 58 @ 5200 68 @ 3600 9.0:1 2bbl 1975

2B 1400 EA63S 58 @ 5200 68 @ 1500 8.5:1 2bbl 1976

3 1600 EA71 67 @ 5200 81 @ 2400 8.5:1 2bbl 1976-79

3A 1600 EA71 65 @ 5200 80 @ 2400 8.5:1 2bbl 1976-79 4X4

3B 1600 EA71 68 @ 4800 84 @ 2800 8.5:1 2bbl 1980-82

3C 1600 EA71 69 @ 4800 86 @ 2800 9.0:1 2bbl 1983-84

4 1800 EA81 72 @ 4800 92 @ 2400 8.7:1 2bbl 1980-82

4A 1800 EA81 73 @ 4800 94 @ 2400 8.7:1 2bbl 1983-84 Brat/2dr GL

4B 1800 EA81 82 @ 4866 103 @ 2800 9.5:1 2bbl 1985-87 4DR/Wagon DL

4C 1800 EA82 94 @ 5200 103 @ 2800 9.0:1 MPFI 1985-87 4DR/Wagon GL-10

4D 1800 EA82 90 @ 5600 101 @ 2800 9.5:1 SPFI 1985-94 3DR/4DR/Wagon/Loyale

4E 1800 EA82 84 @ 5200 101 @ 3200 9.5:1 2bbl 1987 3DR/4DR/Wagon

4F 1800 EA82 84 @ 5200 101 @ 3200 9.5:1 SPFI 1987-89 4DR

4G 1800 EA82 97 @ 5200 103 @ 3200 9.5:1 MPFI 1987-91 XT

5 1800 Turbo EA81T 95 @ 4800 123 @ 2000 7.7:1 Port Inj. 1983-84 4DR/3DR/Wagon Turbo

5A 1800 Turbo EA82T 111 @ 4800 136 @ 2800 7.7:1 MPFI 1985-86 4DR/Wagon/XT Turbo

5B 1800 Turbo EA82T 115 @ 5200 134 @ 2800 7.7:1 MPFI 1987-90 3DR/4DR/Wagon/XT/Loyale Turbo

6 1200 3cyl EF12 66 @ 5200 70 @ 3200 9.0:1 2bbl 1985-93 Justy

6A 1200 3cyl EF12 73 @ 5600 71 @ 3600 9.1:1 MPFI 1990-94 Justy

7 2.7 6cyl ER27 145 @ 5200 156 @ 4000 7.7:1 MPFI 1988-91 XT-6

8 2.2 4cyl EJ22E 130 @ 5600 137 @ 4400 9.5:1 SOHC 1990-94 Legacy

8A 2.2 4cyl EJ22E 135 @ 5400 140 @ 4400 9.5:1 SOHC 1995-96 Legacy/Impreza

8B 2.2 4cyl EJ22EZ 137 @ 5400 145 @ 4000 9.5:1 SOHC 1997-98 Legacy/Impreza

8C 2.2 4cyl EJ22EZ 142 @ 5600 149 @ 3600 9.5:1 SOHC 1999-01 Legacy/Impreza

9 2.2 Turbo EJ22T 160 @ 5600 181 @ 2800 8.0:1 SOHC 1991-94 Legacy Turbo

10 3.3 6cyl EG33D 230 @ 5400 228 @ 4400 10.0:1 DOHC 1992-97 SVX

11 1.8 4cyl EJ18 110 @ 5600 110 @ 4400 9.5:1 SOHC 1993-96 Impreza

11A 1.8 4cyl EJ18 115 @ 5600 120 @ 4400 9.5:1 SOHC 1997 Impreza

12 2.5 4cyl EJ25D 155 @ 5600 155 @ 2800 9.7:1 DOHC 1996 Legacy

12A 2.5 4cyl EJ25D 165 @ 5600 162 @ 4000 9.7:1 DOHC 1997-98 Legacy/Impreza/Forester

12B 2.5 4cyl EJ251 165 @ 5600 165 @ 4000 9.7:1 SOHC 1999 Legacy/Impreza/Forester

12C 2.5 4cyl EJ251 165 @ 5600 166 @ 4000 10.0:1 SOHC 2000-04 Legacy/Impreza/Forester/Baja

12D 2.5 4cyl EJ253 168 @ 5600 166 @ 4000 10.0:1 SOHC 2005 Legacy/Impreza/Forester

12E 2.5 4cyl EJ25 163 @ 5600 166 @ 3600 10.0:1 SOHC PZEV 2005 Legacy PZEV

12F 2.5 4cyl EJ25 173 @ 6000 166 @ 4400 10.0:1 SOHC i-AVLS 2006-07 Impreza/Forester

12G 2.5 4cyl EJ25 175 @ 6000 169 @ 4400 10.0:1 SOHC i-AVLS 2006-07 Legacy

13 2.0 Turbo EJ205 227 @ 6000 217 @ 4000 8.0:1 DOHC 2002-05 WRX

14 3.0 6cyl EZ30D 212 @ 6000 210 @ 4400 10.7:1 DOHC 2001-04 Outback

14A 3.0 6cyl EZ30R 250 @ 6000 219 @ 4200 10.7:1 DOHC AVCS AVLS 2005-07 Outback/Tribeca

15 2.5 Turbo EJ255 210 @ 6000 235 @ 3600 8.2:1 DOHC AVCS 2004-05 Forester XT/Baja Turbo

15A 2.5 Turbo EJ255 230 @ 5600 235 @ 3600 8.2:1 DOHC AVCS 2006-07 WRX/Forester XT

15B 2.5 Turbo EJ255 250 @ 6000 250 @ 3600 8.2:1 DOHC AVCS 2005-07 Legacy GT/Spec-B

16 2.5 Turbo EJ257 300 @ 6000 300 @ 4000 8.2:1 DOHC AVCS 2004-07 STI

The first line was just a way for me to organize.

[DerFahrer]

I see a few errors, and one I'm not sure about.

 

First off, are you sure the 360 motor is an EA designation? The 360 engine has virtually NOTHING in common with any boxer engine.

 

And where's the 1000 engine?

 

The Impreza 1.8 is an EJ18, not an EA18. If you want to get technical, it's an EJ18E.

 

The SVX is technically an EG33D.

 

The WRX 2.0 in America is the EJ205. The EJ207 is the JDM STi engine.

 

There is no EZ30R. All 3.0 6cyls are EZ30D.

 

There's a few HP and compression anomalies too, but I'll try to look those up later.

 

That's all I can confirm at the moment. I might find more stuff out later.

[Kostamojen]

I didnt know there was a 1000 engine. Thats probably the EA52. Know any info on it?

 

Fixed the EJ18, that was a typo. I'm not including the E designation until I get both designations. Ill try to check on that one at work tommorow.

 

Theres only one EG33, so the D doesnt really matter. I added it anyway.

 

Are you sure the EZ30-R isnt EZ30R? Ill check tommorow too, but it shouldnt be the same as the earlier model considering the major differences.

[DerFahrer]

I have just confirmed that all 3.0 sixes are EZ30D.

 

I'm finding more out right now...

[DerFahrer]

Whoa... information overload!!

 

Did some browsing through the model information for much of the Subaru line...

 

There are also EJ222's and EJ223's, as well as EJ252's, and EJ259's.

 

Once I recover from the meltdown , I'll try to see what car has what.

 

Oh, and the 1000 never made it over to the US. It was in the JDM FF1. So that's probably why you can't get any info on it.