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Old 07-20-2006, 09:09 PM   #1
elwood-914
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Default What year Engine? EJ22

Hi all,
I just bought a Subaru EJ22engine but the problem I don't know what year car it came out of. I was told it was an Impezza. I need to buy head gaskets and such but I am clueless as to what year.

Thanks
Tim
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Old 07-20-2006, 09:40 PM   #2
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an EJ22 is just that.....you can't order the wrong ones
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Old 07-20-2006, 10:27 PM   #3
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Thanks Uncle Scotty
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Old 07-20-2006, 10:32 PM   #4
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for head gaskets, i dont think there is a difference. but there are different ej22's floating around thru out the years. turbo one, single exhaust port ones, and the n/a dual port ones. just wanted to point that out.
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Old 07-21-2006, 07:53 AM   #5
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Quote:
Originally Posted by project_legacy
for head gaskets, i dont think there is a difference. but there are different ej22's floating around thru out the years. turbo one, single exhaust port ones, and the n/a dual port ones. just wanted to point that out.
...good info, but that has to do with the heads.
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Old 07-21-2006, 08:08 AM   #6
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I think they went to thinner head gaskets on the later 2.2s. not sure exactly when though. if you don't get the right ones, you'll change your compression ratio.
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Old 07-21-2006, 08:38 AM   #7
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Quote:
Originally Posted by Elwood
I think they went to thinner head gaskets on the later 2.2s. not sure exactly when though. if you don't get the right ones, you'll change your compression ratio.
yeah, by .01 %. ..... come on.
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Old 07-21-2006, 08:39 AM   #8
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check your math
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Old 07-21-2006, 09:28 AM   #9
Subie Gal
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Quote:
Originally Posted by Elwood
check your math

doesnt matter as the Uncle is right.

All 2.2 HG's supercede to one part, and one part number

you can't mess this one up

Jamie
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Old 07-21-2006, 10:25 AM   #10
Elwood
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Quote:
Originally Posted by Subie Gal
All 2.2 HG's supercede to one part, and one part number
...
Is this a recent change? I wonder how I managed to buy (just this spring) 2 different sets of EJ22 head gaskets?

I first ordered a set for a 99 hoping they'd be nice multilayered steel gaskets. They were, but were noticebly thinner than the original ones my motor had. I then ordered another set for a 96, and got the crappy composite, but correct thickness gaskets.

The old gaskets were 1.52mm thick. I believe the new ones are probably the same thickness as the phase 2 EJ25, which are only 0.58 mm thick ( I can measure later and confirm). That equates to a volume difference of almost 7 cc's. Given that these motors have combustion chambers in the 40-50cc range, a 7 cc change would be significant. Depending on what you started with and what you went to, that could raise or lower the CR by 1 or so. That could even be desirable, depending on what you're going for, but I'd sure like to know about it beforehand, rather than just slapping it together and seeing what happens.

But hey, if SOA says it's ok, I must just be crazy...

Jim
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Old 07-21-2006, 02:29 PM   #11
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Jim is right!

I did some diggin and I have found a difference

1993-1998 = EJ22/EJ22EZ


1999-2001 = EJ22 but with a different head gasket part number

so yeah, there appears to be a difference - - oops!!

1993-1998= supercede to one part number

1999-2001 = are all the same part number, which differs from the older model

seems there is a slight difference based on early vs later production runs

are there any markings on the block?
maybe we can identify the model year.

Jamie
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Old 07-21-2006, 03:17 PM   #12
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...what we NEED is an easy visual way to tell the EJ22 form the EJ22EZ.



...and the OP posted EJ22....not EJ22EZ
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Old 07-21-2006, 03:41 PM   #13
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I did some more reading and I believe what we are talking about here is the phase 1 to phase 2 change over, similar to what the EJ25 went through. I can’t recall seeing a phase 2 EJ22 in person, but it sounds like in 99 the EJ22 head got redesigned, and looks similar to the modern SOHC EJ25, with big, flat, rectangular valve covers, with the spark plug wires passing through them. This differs from the earlier EJ22s, which had narrower (top to bottom) valve covers, and the plugs and wires came out above the valve cover. So it should be pretty easy to tell them apart….
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Old 07-21-2006, 04:46 PM   #14
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Quote:
Originally Posted by Uncle Scotty
an EJ22 is just that.....you can't order the wrong ones
Unless he's OBDII and he got an OBDI engine...or vice versa.

It would be a PITA to swap if it was the wrong emissions. Not that it's not doable.

However, the headgaskets would be the same through all years.
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Old 07-22-2006, 02:10 AM   #15
elwood-914
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Quote:
Originally Posted by Elwood
I did some more reading and I believe what we are talking about here is the phase 1 to phase 2 change over, similar to what the EJ25 went through. I can’t recall seeing a phase 2 EJ22 in person, but it sounds like in 99 the EJ22 head got redesigned, and looks similar to the modern SOHC EJ25, with big, flat, rectangular valve covers, with the spark plug wires passing through them. This differs from the earlier EJ22s, which had narrower (top to bottom) valve covers, and the plugs and wires came out above the valve cover. So it should be pretty easy to tell them apart….
The sparkplug wires do not go through the valve covers, so I assume I have an earlier version. This is very interesting to me to learn about unfamiliar motors. I do appeciate everyones imput.
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Old 07-22-2006, 11:33 AM   #16
Subie Gal
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I'll take a look (on monday) at the spark plug wires.

betcha there will be an obvious difference in shape as well based on the production date cut offs....

we can probably figure it out by studying the differences

Jamie
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Old 07-22-2006, 07:30 PM   #17
DerFahrer
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Yeah, the 90-98 EJ22 is the EJ22E, Phase I, appearing in the Legacy and Impreza. 90-96 went virtually unchanged, but in 97, it switched to solid lifters and upped its compression ratio, and thusly became interference. 99, the EJ22EZ came out, Phase II, and that engine had the relocated thrust bearing like the other Phase II's.

I would think the HGs would have changed in 97, with the upped CR and everything, but I guess not.

I can't recall when they switched to the plug wires going through the valve covers, but I know I've seen a 99 Legacy EJ22 with the wires through the valve covers.

If I can track down a 97 Legacy or Impreza at work, I'll try to look at it.
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