Which would you rebuild?

[Antihero]

Ok let's just say I might have access to a 2009 Legacy GT shortblock with under 30K on it that spun a bearing, and a 2005 Forester XT shortblock that is in pieces, that was replaced due to a blown turbo putting a fxxxton of metal in the oil but supposedly has no issues, and was just replaced as a precaution.

I'm just looking to do an OEM rebuild, and I will be putting 2.0L heads on it.

Which would you rebuild?

also, supposedly the forester block is the same as the STi block, down to even the part number....any truth to that?

[Joe]

04-05 forester did have the 257 sti block.

[98Wagoon]

257ftw.

[My Name]

xt block all the way just make sure the oil passages get power cleaned.

[Antihero]

Thanks for the input errrrrrbuuuudddy!

I have the 257 on my bench, and I will look it over further tomorrow, and I didn't really see any metal flakes on any of the parts. For some reason after it was taken out, it was torn down, and the tech who did it doesn't remember why, but the cylinders and crank journals look amazing, so I dunno. Whatever, onward tomorrow!

[98Wagoon]

huzzah!

my brothers fxt had the vf43 squirt itself into the engine at like.. 35k miles? they stripped it down and rebuilt it and the block was good to go. runs like a champ still.

[Antihero]

Epic. I have a VF39 sitting around my apartment lol

[98Wagoon]

that would be much happier than a 43 :lol: I wouldnt put one on anything for fear of it desintigating on me. I demand updates regularly on this block, btw!

[Antihero]

not a problem, I'm just in the "getting input and pricing stuff out" phase right now, and keep in mind I have a Datsun, a still disassembled CA18DET, and bills to take care of, so this is gonna take awhile.

Oh and this will be getting 2.0L heads. I think I said that earlier. I'm too lazy to scroll up.

[98Wagoon]

yessir you did! just so you knoowww though they has to have some machining done to them to avoid detonation.

[subaru_crazy]

i thought fxt was a ej255.

[RCKSTR]

Datsun CA18DET.

nuff said right there. :)

[Bu11dogg2]

The 04-05xt has the ej257. The 06 might too but the 07 does not.

[Seraphinwolf]

Take both. Strip them both down and look at the damage. Whichever looks more solid. Ignore the 257 fact until you look inside and and judge the block it's self.

[-III]

I would hate you if you went 2.5. Makes it an uneven race:lolno:

[Joe]

i thought fxt was a ej255.

06 to present has the ej255.

The 04-05xt has the ej257. The 06 might too but the 07 does not.

Nope, i got the wrx block. 04-05 only. bastards.

[Antihero]

nuff said right there. :)

um no. why would I go to a smaller engine? besides NA dual carbs will be fun. I have no idea what the CA will end up in, but definitely not a Z or a SX, especially since i refuse to get another 240.

[Berge56]

pending no big issues....257 ftw

[SicRedGt]

EJ255 and 257 blocks are identical. Pistons, crank, rods, etc. The "257" denotes the STI heads. Look up part numbers for them, they match.

[Antihero]

um the ej257 blocks are semi closed, ej255s are not...

[-III]

Semi closed? I'm not educated in this area

[SicRedGt]

Read and you shall see. The service part number for LGT and STI pistons are also identical.

http://en.wikipedia.org/wiki/Subaru_EJ_engine#EJ25

I've done 255 and 257 engines, heads are the main difference. Head gaskets are also same PN from Subaru.


[edit (http://en.wikipedia.org/w/index.php?title=Subaru_EJ_engine&action=edit&section=33)] EJ257

DOHC (http://en.wikipedia.org/wiki/DOHC) 16 valve turbo. Originally designed for the North American Impreza STI in 2004 with AVCS and DBW. The same exact shortblock as EJ255 except the EJ255 has a different domed piston vs the EJ257. The heads also have different components. Subaru of America designates the same part numbers for an EJ255 shortblock, and EJ257 shortblock with the exception of the pistons.
Usage:

[Antihero]

wikipedia? really? *shakeshead*
the legacy gt block is an EJ255 correct?

[SicRedGt]

Yes, the other forum I belong to has had many heated debates on this. 05-07 LGT uses the same short block as an STi. Having had one of each apart, I could not tell any difference in the shortblock.
Funny thing is if you buy service pistons from Subaru STi and LGT are the same PN.

[subaru_crazy]

EJ255 and 257 blocks are identical. Pistons, crank, rods, etc. The "257" denotes the STI heads. Look up part numbers for them, they match.

Read and you shall see. The service part number for LGT and STI pistons are also identical.

http://en.wikipedia.org/wiki/Subaru_EJ_engine#EJ25

I've done 255 and 257 engines, heads are the main difference. Head gaskets are also same PN from Subaru.


[edit (http://en.wikipedia.org/w/index.php?title=Subaru_EJ_engine&action=edit&section=33)] EJ257

DOHC (http://en.wikipedia.org/wiki/DOHC) 16 valve turbo. Originally designed for the North American Impreza STI in 2004 with AVCS and DBW. The same exact shortblock as EJ255 except the EJ255 has a different domed piston vs the EJ257. The heads also have different components. Subaru of America designates the same part numbers for an EJ255 shortblock, and EJ257 shortblock with the exception of the pistons.
Usage:
not same pistons?

[SicRedGt]

I've read on nabisco forum the 57 piston has a slightly deeper dish, just a couple of cc's. BUT, the Subaru parts catalog; replacement pistons LGT vs STI are the same part number, up to 07 I believe. But the blocks are identical.

shtboxer works at a Subie dealer, correct? Ask him to look up 05-07 pistons. Crawford performance also comfirmed to me that they were the same when I was building my motor.

I ended up going with forged units, which fit 255's and 257's, same part # there too.

[Antihero]

I work at a dealer as well, and my parts folk havent gotten back to me yet. Im actually surprised shtbxr hasnt jumped in here yet.

[Antihero]

sicred is correct, i just looked over the 255 and the 257, and blockwise they are identical from what my eyes gather.

[Seraphinwolf]

Yeah the LGT 255's are semi closed like the STi's 257. There isn't much difference in there frankly.
So the LGT has 257 rods? Cause STi and WRX don't share rods...
As for Crawford they are merely responding to clearances. Subaru could merely replace pistons with STi ones on the LGT's WHEN they go but may not be from factory. Lego'ability of Subaru parts is notorious so it's no surprise. If anything it could just be a different rated metal for the pistons or some treatment that's all. Stupid little things like that can throw a part hunt for a loop when the part is otherwise 99% identical.

[subaru_crazy]

EJ255
DOHC (http://www.newenglandsubarus.com/wiki/DOHC) turbocharged (http://www.newenglandsubarus.com/wiki/Turbocharged), with sodium-filled valves originally designed for North American market, now sees usage in some European Imprezas and Legacies destined for Australia (http://www.newenglandsubarus.com/wiki/Australia) and South Africa (http://www.newenglandsubarus.com/wiki/South_Africa). Power 230-265 hp
Usage in North America:

Impreza (http://www.newenglandsubarus.com/wiki/Subaru_Impreza): 2006–present
Forester (http://www.newenglandsubarus.com/wiki/Subaru_Forester): 2004–present
Legacy (http://www.newenglandsubarus.com/wiki/Subaru_Legacy)/Outback (http://www.newenglandsubarus.com/wiki/Subaru_Outback): 2003–present
Baja (http://www.newenglandsubarus.com/wiki/Subaru_Baja): 2004 - 2006
Usage in the rest of the world:

Legacy (http://www.newenglandsubarus.com/wiki/Subaru_Legacy)/Outback (http://www.newenglandsubarus.com/wiki/Subaru_Outback): 2007–present
Impreza (http://www.newenglandsubarus.com/wiki/Subaru_Impreza): 2006–present

[Seraphinwolf]

Source? Cause it's been proven that 04/05 XT Foresters had 257's.

[subaru_crazy]

Source? Cause it's been proven that 04/05 XT Foresters had 257's.
that link that sicredgt had a couple post ago.

[SicRedGt]

[QUOTE=Seraphinwolf;360942] Lego'ability of Subaru parts is notorious so it's no surprise. QUOTE]

:lol::lol: so true.