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Old 02-14-2003, 02:31 AM   #1
seven881
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Default EJ22T Swap Help

Ok, I've finally got the loot to do the swap. I'm just going to be swapping out the shortblock on the engine. Is there anyone out there who can give me some heads up on the process I'd appreciate it. Also, what gaskets besides the heads would I need?

Oh and I'll be putting in a WRX crossmember so I can switch to WRX exhaust plumbing. If that can be done I can use WRX aftermarket exhaust items correct which would be great?
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Old 02-14-2003, 11:17 AM   #2
Eric SS
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The process is pretty easy. Get Head Gaskets (EJ22T) and new Head bolts and some ultra grey sealer for the oil pan. That's really about all you need.

The biggest tip I can tell you is when you take a bolt off of your EJ25, put it right onto the new engine just so you remember where everything goes.

AND make sure you note the routing of the main wiring trunk underneath the intake manifold. I got mine all together just to find out that I need to take the intake and waterneck off to put the trunk in there.

On the EJ22T, in the middle of the top of the block (TO the passenger side of where it says "EJ22T" stamped into the block, there is a little L shaped fitting that comes out of the block that is not on the EJ25. Don't worry about it. Nothing will come out of there because it is juset a crankcase vent. Other than that, have fun!

Eric
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Old 02-14-2003, 12:19 PM   #3
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Cool thanks, I'm going to be taking pics with my digi cam to help me remember where things go and to possibly document the process. Also, how hard is it to disassemble the block to take pics of the crank, rods, and pistons to set the record straight on the internals of a new EJ22T block.

Thanks for your help.
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Old 02-14-2003, 02:30 PM   #4
Eric SS
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Quote:
Originally posted by seven881
Cool thanks, I'm going to be taking pics with my digi cam to help me remember where things go and to possibly document the process. Also, how hard is it to disassemble the block to take pics of the crank, rods, and pistons to set the record straight on the internals of a new EJ22T block.

Thanks for your help.
It's not hard but I really wouldn;t recomend splitting your block. You can see the crank and rods without dissasymbaling it. Just take some pics of the seams in the crank and rods. That's enough for us to see if they are forged or cast.

Eric
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Old 02-15-2003, 02:17 AM   #5
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where did you guys get your ej22t's?
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Old 02-15-2003, 11:00 AM   #6
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Quote:
Get Head Gaskets (EJ22T)
That depends. If you're running the SOHC heads from a 2.5, use the head gaskets from an SOHC 2.5.

Quote:
note the routing of the main wiring trunk underneath the intake manifold
*grins*.. you too huh?

Quote:
Nothing will come out of there because it is juset a crankcase vent.
You may want to block this off eventually. It stayed pretty dry until we started running in excess of 12 pounds of boost on the motor.

Quote:
where did you guys get your ej22t's?
www.milfordsubaru.com Ask for Gary and tell them Mark Fitzgerald sent you.

One other thing. On the back of the shortblocks, depending on year and make, there is an oil galley cover. Some of these are aluminum, some of these are plastic. If you have an aluminum, whether on the 22t or your 2.5, I'd recommend using it on your new motor. The plastic one's have a tendency to warp and leak.

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Old 02-15-2003, 05:59 PM   #7
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Quote:
Originally posted by Fitz


That depends. If you're running the SOHC heads from a 2.5, use the head gaskets from an SOHC 2.5.

I used the EJ22T gaskets and they work fine. I like the idea of using a gasket designed for the bore of the engine. either way works though I guess

Eric
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Old 02-15-2003, 10:44 PM   #8
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your tranny will have one fitment problem with the block... use a helicoil...
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Old 02-16-2003, 10:29 AM   #9
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Quote:
Originally posted by HOK
your tranny will have one fitment problem with the block... use a helicoil...
Do you know what size?
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Old 02-16-2003, 10:42 AM   #10
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I have one other question. The block I'm getting has the option to get a set of 96 JDM WRX STI 3 heads, intake manifold, and exhaust manifold, sprokects etc. I'm planning on getting all of the items, but how difficult will it be to put a timing belt on?

I've found some info on STI Version 3 heads and it looks like heads are good till 8K RPM, but can the EJ22T rods hold. I would think so, but does a 2001 have a rev limiter?
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Old 02-16-2003, 12:28 PM   #11
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You can get the shortblock for ~$1450 from www.subaruparts.com, I'll try to find the part number for you later
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Old 02-16-2003, 01:10 PM   #12
Eric SS
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Quote:
Originally posted by HOK
your tranny will have one fitment problem with the block... use a helicoil...
FUnny thing is, I didn;t even use the other starter bolt. I just used the one and I have had zero problems with the starter becoming unmeshed or having the other bolt fail.

Eric
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Old 02-16-2003, 03:04 PM   #13
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I got my block etc... from Mike Shaw Subaru in Denver. They have a few more in stock from what the parts guy said. I paid 1495.00 for it and it was $70 shippimg. I also got the headgaskets and the oil pump. You may need new intake manifold gaskets but I know they can be reused so you'll probably be fine. Here are the part numbers:
94 Legacy Turbo Block: 10103AA310
Headgaskets: 11044AA282
Oil Pump: 15010AA108

Hope this helps ya!
Kyle
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Old 02-16-2003, 08:35 PM   #14
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Quote:
I used the EJ22T gaskets and they work fine. I like the idea of using a gasket designed for the bore of the engine. either way works though I guess
Unless you changed something else, say hello to your 7.2:1 CR engine. The thin SOHC gaskets give you about 7.7:1.

Image how slow your car would be without a turbo...
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Old 02-16-2003, 11:50 PM   #15
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Quote:
Originally posted by wac


Unless you changed something else, say hello to your 7.2:1 CR engine. The thin SOHC gaskets give you about 7.7:1.

Image how slow your car would be without a turbo...
ummm... no I'll be using JDM WRX STI 3 heads, but I don't know what the compression ration would be though. I'd have to find specs on the heads, but I think it ends up being about 8.0:1. But yes 7.7:1 compression without a turbo would suck luckly one will be going on right after the block swap.
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Old 02-17-2003, 09:13 AM   #16
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sorry don't remember the size...

i've heard of people using one bolt and not having any problems... but two bolts are better then one hehe :P
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Old 02-17-2003, 11:57 AM   #17
Eric SS
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Quote:
Originally posted by wac


Unless you changed something else, say hello to your 7.2:1 CR engine. The thin SOHC gaskets give you about 7.7:1.

Image how slow your car would be without a turbo...
Are you sure those are the corect gasket thinckness's on your website??? They both seemed about the same thickness to me

Eric

Last edited by Eric SS; 02-17-2003 at 12:12 PM.
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Old 02-17-2003, 12:48 PM   #18
Eric SS
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OK, I'm looking at some pics that you (wac) posted from a long time ago in another thread.

You have this as an EJ22T gasket:



And this as an EJ25 gasket:




I'm trying my hardest to remember but I'm pretty sure my EJ22T gaskets didn;t look like that. I think it looked like the EJ25 gasket pictured
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Old 02-17-2003, 01:05 PM   #19
Eric SS
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I keep using the numbers provided on your site and for the stock Phase 2 EJ25 SOHC motor, and every calculator I have used has given me over 11.0:1 CR for a stock EJ25. THis is using 99.6mm (3.921")bore, 79mm (3.11")stroke, .058cm (.0228") head gasket, 0 deck height, 50cc head volume, and 6cc piston volume.

So something isn't right there. Am I missing something or are you?

When I substitute .152cm (what you say is the EJ22T head gasket thickness) my calculations using the rest of the stock EJ25 dimentions come out to 10.0:1 exactly, which is Subaru's advertised CR.

Oddly enough, .152cm is roughly equal to .058 inches! I would be willing to bet that the .058 number that you have is supposed to be in inches instead of centimeters. Most gasket thicknesses are measured in inches.

I think that your Head gasket thickness is wrong for the EJ25 motor on your page and I'd be willing to bet that both gaskets are the same thickness, and therefor, having the EJ22T gasket with the smaller bore will net you a slightly higher CR than using the EJ25 gaskets.

Unfortunatly, that means we ALL have roughly 7.2:1 compression ratio.

Of course, like I said, I could be missing something


Eric

Last edited by Eric SS; 02-17-2003 at 01:21 PM.
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Old 02-17-2003, 03:12 PM   #20
Impreza25RS
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Eric,
Im looking at my EJ22T headgasket right now and he has the correct picture...they look so rediculousy close though...not sure of thickness or anything but the 2 dimensional photo makes them look similar.
Kyle
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Old 02-17-2003, 04:32 PM   #21
Eric SS
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Quote:
Originally posted by Impreza25RS
Eric,
Im looking at my EJ22T headgasket right now and he has the correct picture...they look so rediculousy close though...not sure of thickness or anything but the 2 dimensional photo makes them look similar.
Kyle
98RS-T Owners UNITE!
Do you ahve a caliper (measuring kind, not a brake caliper)? If so, can you mike the gasket and tell me what thickness it is uncompressed?

Do you have an EJ25 headgasket? if so, mike that for me also
Thanks

Eric
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Old 02-17-2003, 07:21 PM   #22
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Eric,

I was going to reply earlier today, but since you were editing your posts, I decided to troll for a bit...

Those numbers I got are definitely in centimeters. My digital caliper can switch between inches and millimeters. I used centimeters in the chart because it's easy to calculate cc's from it.

The SOHC gasket is a solid formed metal piece with steel fire rings. The reliefs you see are forms in the metal made with a stamping die.

The EJ22T gasket is a much thicker graphite composite design with steel fire rings and webbing (dark lines connecting the holes and fire rings) for minor structural integrity. It's the same thickness and design as my N/A EJ22 gaskets, except that the coolant holes match those of the closed deck block (but not my N/A heads). They're actually about 0.16 cm thick when first taken out of the plastic shipping bags, but squish down to about 0.152 when torqued.

The problem with leaking in the thick graphite gaskets occurs when the graphite moves and allows the steel fire rings to deform. The solid steel SOHC design seems to resist deformation much better.

I'm still puzzled as to why the stock SOHC CR works out to such a high number, when the service manual only states 10.0:1. The bore difference between 9.96 cm and 9.69 cm doesn't really change the CR by any significant amount. But I'll still correct it.
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Old 02-17-2003, 08:16 PM   #23
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Quote:
Originally posted by wac

I'm still puzzled as to why the stock SOHC CR works out to such a high number, when the service manual only states 10.0:1. The bore difference between 9.96 cm and 9.69 cm doesn't really change the CR by any significant amount. But I'll still correct it.
I'm guessing that the compressed thickness of the EJ22T gasket is a lot different than the non-compressed thickness. I'm still going to venture that something in one of your measurments isn't correct. I just don't see a stock production head gasket being .022". I know of a few aftermarket poly-steel and copper head gaskets for small block chevies that are .022 but even those are not recommended for Aluminum heads.

There is just somethnig that doesn;t add up. I wish I had some head gaskets here to check.

Eric

PS: please don't think that this is in any way an attack on you or your calculations. I just want to get all MY facts straight
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Old 02-17-2003, 09:34 PM   #24
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OK, I just went out and took some pics of the little pieces of head gasket that sticks out beyond the block/head surface. Unfortunatly, I can't get my digicam to connect to my computer for some reason.

I can tell you this though, there is no way that the compressed height for that gasket is 1.52mm. It is much thinner than that. I wish I had a dial caliper or some feeler gauges here. The best I could do was take an old spark plug that I know is gapped at .038" and stick something between the electrode and ground strap to get an idea of thickness, then, I tried to fit the same object in the space between the head and block where there is no gasket. Well, the object that fit through the .038 gap in the plug with ease is not even close to fitting between the cylinder head to block gap.

Eric

Edit: fixed the decimal place. I was thinking in Centimeters

Last edited by Eric SS; 02-17-2003 at 09:45 PM.
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Old 02-17-2003, 09:38 PM   #25
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Quote:
I'm guessing that the compressed thickness of the EJ22T gasket is a lot different than the non-compressed thickness. I'm still going to venture that something in one of your measurments isn't correct. I just don't see a stock production head gasket being .022". I know of a few aftermarket poly-steel and copper head gaskets for small block chevies that are .022 but even those are not recommended for Aluminum heads.

There is just somethnig that doesn;t add up. I wish I had some head gaskets here to check.

Eric

PS: please don't think that this is in any way an attack on you or your calculations. I just want to get all MY facts straight
The thick gaskets only compress about 0.5 mm - already thought of that. The thin SOHC ones don't really compress in the classic sense, since they're formed and don't flatten down until installed.

I only get offended if you have no proof for your accusations. In the meantime, I have seen them and measured them... On multiple cars... At Exeter Subaru fresh off the poly bags... At autocrosses.. At track days... Shamelessly...

Why don't you crawl around your engine bay, look for where the heads are bolted to the block, and measure the gap with a feeler gauge? That will be more constructive than than trying to second-guess my numbers?

Edit: you're quick! Sounds like you probably have SOHC gaskets...

BTW, EJ22T = 1.52 mm; SOHC = 0.58 mm.
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