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Old 10-13-2011, 10:02 PM   #1
wrx_traut
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Default blown ej20

So I’m looking at buying a Impreza with a ej20 swap from a legacy. He says the engine blew up, it runs but barely. Anything I should know about these engines? Are they worth rebuilding or would it just be easier to do another swap. Just looking for a somewhat reliable car I can rally-x and ice race with.
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Old 10-15-2011, 02:04 AM   #2
DHRDAN
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no don't do it.


You have neither the time or the "know-how" to waste yourself on this.

walk-away.
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Old 10-17-2011, 08:53 PM   #3
wrx_traut
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eh.
I'm think im gona buy it. First time I looked at it the battery was dead, so I went to take a second look at it and brought a jumper. It started right up. Idled fine just smoked a bit. I dont think it is actually blown. I'll buy it, take a shot in the dark. I guess a compression test will tell all.
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Old 10-17-2011, 09:40 PM   #4
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If it still runs without nasty noises, then it's probably fixable.

If you can get a good deal on it and its just a backup/fun car, then I'd say go for it.

Rebuilding an engine is more about having the money, space, time, and tools than having the "know how". It's 2011. The ej20 rebuild has been done more than a few times. Any "know how" can be found with a quick search on the internet. If not then learn the hard way, thats the fun part.
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Old 10-18-2011, 01:25 AM   #5
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and if you dont want to rebuild it... PM me ill make you a good deal on an EJ20 Short block...

-=Suberdave=-
www.suberdave.com
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Old 10-19-2011, 10:26 PM   #6
wrx_traut
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I'll let you know, thanks.
I bought it for $900. It’s a 98 with a rs front end swap. I haven't had any time to dig into it yet, but from what I see the car is a complete cobble job. Never rebuilt an EJ before just a few dirt bikes, so this will be a good learning experience. If it turns out to be a complete mess I will swap what I can into my 95 and part out the rest.
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Old 11-14-2011, 10:23 PM   #7
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Yep, has a dead cylinder. I did a compression test a few weeks ago. 170,150,160, and 0. Now when I get some time this winter I will tear it apart and see what kind of damage is done to the cylinder. Hopefully its rebuildilble.

If the block is junk, I think I might just turbo the 1.8. Have to do some more research first to see if it is feasible. Has anyone done a ej18 - ej20g hybrid? Swap the heads, and everything else to the 1.8 block?
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Old 11-15-2011, 12:20 AM   #8
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You can't use EJ20G heads on an EJ18 the biggest diameter of the combustion chamber in the head is 90 mm and the bore of the block is 87.9 mm.
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Old 11-17-2011, 09:49 PM   #9
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Hmmm, I see people putting EJ22t heads on the EJ18. What makes those work with that block?
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Old 11-18-2011, 05:55 AM   #10
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They don't (work well), the bore sizes also don't match.
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Old 11-18-2011, 02:18 PM   #11
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Quote:
Originally Posted by wrx_traut View Post
If the block is junk, I think I might just turbo the 1.8. Have to do some more research first to see if it is feasible. Has anyone done a ej18 - ej20g hybrid? Swap the heads, and everything else to the 1.8 block?

Sorry to hear about your motor, but that's whey you got it cheap. Anyway, about the turbo 1.8, check out Joejoe's thread. It's probably the most well documented ej18t build out there. Here is a link.

http://www.rs25.com/forums/f7/t81773-project-ej18t.html
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Old 01-21-2012, 06:53 PM   #12
wrx_traut
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I finally got around to tearing this thing apart.

Also found the oil squirter in the bottom of the oil pan.
Good news is the cylinder is not damaged.
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Old 01-23-2012, 08:37 PM   #13
klys
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I rebuilt mine when a conrod bearing to crank disentegrated... I've got my crankshaft chromed and polished, and all the other surface ground ... finally got under sized acl bearings ... and new oem rings

for now, I need to install the oil pan, oil feed... and heads. and I should be ready to reinstall it in a 2004 WRX

btw it's a ej205 that I'm rebuilding..

hopefully everything will work fine.

it was pretty straight forward to do, so if you got the tools.. and patience and the shop manual, you shouldn't have any problems.

make sure that you replace you piston or pistons with proper sized pistons. I don't know for your EJ20 but in my case it had A and B pistons which is due to the tolerance size of piston to cylinder

if you need help or insights let me know

Last edited by klys; 01-28-2012 at 11:54 AM.
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Old 01-28-2012, 10:21 AM   #14
wrx_traut
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It will be my first rebuild but I should be able to get it done. I think I am going to throw in a set of Wisecos and I am debating whether to use the stock rods or get some eagles. I don’t want to go crazy on the build because I don’t think I will ever need it. But then I always go back to, well since I have it apart I might as well.
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Old 01-28-2012, 11:03 AM   #15
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Then at least get New Age STI rods (USDM EJ257 work fine). Stock rods are crap. They usually let go before the pistons do but it seems you had a fuelling issue there.
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Old 01-28-2012, 11:47 AM   #16
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I thought about those too. I think it was a multiple of things that caused it to blow a hole through the piston. 1. Cylinder 4 fuel issue. 2. Oil squirter fell out, not cooling the piston. 3. Manual boost controller. 4. Low coolant, Overheated.
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