STI 2L bottom end into 2003 B4/GT ?

by **parso_rex** » Thu Oct 29, 2009 2:59 pm

Hi guys,
The guys at the workshop have a 10/2003 Lib GT wagon with auto tranny which has died. It does say B4 on the compliance plate (so I'm a bit confused

) same later model 04,05,06 etc shape however. Does anyone know if the WRX STI bottom end can be bolted in without any issues or is there some bizzare difference in the castings or some crap

The reason I ask is the 2L STI blocks can be bought new for $2400 from Subaru complete with proper forged piston Vs the $3K plus for the LGT 2L bottom end. Its some sort of special I believe. trying to save the owner some dollars

Cheers

Mark

by **Hotwire** » Thu Oct 29, 2009 3:03 pm

parso_rex wrote:Hi guys,
The guys at the workshop have a 10/2003 Lib GT wagon with auto tranny which has died. It does say B4 on the compliance plate (so I'm a bit confused ) same later model 04,05,06 etc shape however. Does anyone know if the WRX STI bottom end can be bolted in without any issues or is there some bizzare difference in the castings or some crap

The reason I ask is the 2L STI blocks can be bought new for $2400 from Subaru complete with proper forged piston Vs the $3K plus for the LGT 2L bottom end. Its some sort of special I believe. trying to save the owner some dollars

Cheers

Mark

All I can add is the engine code for LGT's is EJ20X or EJ20Y. Im guessing you want to use the EJ207 block? I dont know the differences, have spent many hours searching the net with no avail. Sorry I can't add more.

by **adhar** » Sat Oct 31, 2009 9:29 am

Most 2L and 2.5L bottoms ends will be interchangeable. My old man recently put a 2.5L bottom end (bought from Subaru this year) into a v5 Sti WRX, so we kept the v5 heads and everything. Exhaust/intakes,tranny all fitted up no probs.

I was thinking of putting that 2.0L bottom end into my Liberty as it has forged pistons etc, but i couldn't be bothered really as its a daily driver.

by **parso_rex** » Thu Nov 05, 2009 10:23 pm

customer ended up going for a stock Lib 2L bottom end ~$3100 from SA. Back together now
I just reflashed a mates 05 Lib GT yesterday . These things are shit from the factory it would seem

by **Hotwire** » Thu Nov 05, 2009 10:49 pm

parso_rex wrote:...
I just reflashed a mates 05 Lib GT yesterday . These things are shit from the factory it would seem

I have noticed that with the onset of warmer weather, my knock levels are on the increase, and Im constantly at only 0.8250 or 0.9125 IAM.... definately need to sort a tune out

by **phatz** » Fri May 14, 2010 8:36 am

I know this is an old thread but...

I have a big end bearing problem on my MY04 GT Premium (Auto)..
Finally biting the bullet and getting a new 2.0L STI short block..

There was a note on the quote that read;

"Please note; it may not be possible to use the STi piston on the Liberty GT due to tolerance variants. This can only be determined when assembling your new engine"

Apparently due to the AVCS there might be a problem, but won't know till they try? Has anybody done one of these swaps or has experience that can shed some more light?

Thanks in advance

John

by **phatz** » Tue May 25, 2010 3:13 pm

Just an update on this..

The STI 2L short block matched up perfectly with no hassles as advised by a few forum members..

Very happy with the work, car runs like a dream.. and most importantly no more big end knocking.
Pockets are empty now tho!

by **jdm rsk** » Tue May 25, 2010 3:17 pm

Join the club John

by **sti_02** » Thu May 01, 2014 8:37 am

A bit of a thread bump.

Of those people that have put a STI 2.0 block into an 04 Liberty GT.
What head gaskets did you use?
STI or Liberty?
Thickness?
I'm needing to order gaskets/gasket kit. If you have any part numbers that would be great.

TIA

by **Sean82** » Thu May 01, 2014 12:01 pm

Use OEM 2.0L gaskets for the Lib. Chat to Kris at Rising Sun Subaru about getting them

(Haven't done the conversion but I've looked into it in a fair bit of detail...)

by **dr20t** » Thu May 01, 2014 8:17 pm

Depends which Sti 2 litre block you used

Version 7 had forged pistons so are easily discernible

Version 8 and 9 had hyperteutetic pistons with the same block as version 7

Version 10 revision A same as version 8 and 9

Version 10 revision B had thicker walls

If version 7-9 or version 10 revision A, then you can use stock liberty 2.0 l ej20y/x headgaskets

If v10 revision B, then you need specific gaskets from Japan as the water jackets on these don't line up with liberty gaskets

by **sti_02** » Thu May 01, 2014 9:47 pm

dr20t wrote:Depends which Sti 2 litre block you used

Version 7 had forged pistons so are easily discernible

Version 8 and 9 had hyperteutetic pistons with the same block as version 7

Version 10 revision A same as version 8 and 9

Version 10 revision B had thicker walls

If version 7-9 or version 10 revision A, then you can use stock liberty 2.0 l ej20y/x headgaskets

If v10 revision B, then you need specific gaskets from Japan as the water jackets on these don't line up with liberty gaskets

Thanks dr20t

The block is from a ADM 03 STI ?

Any recommendations on getting the correct gasket kit cheaply from local or OS.
Aussie prices are crazy

If someone has a part number, that would be appreciated

by **dr20t** » Thu May 01, 2014 10:03 pm

V7 forged piston short block

Use your liberty headgaskets. Sorry can't help with part number now but japanparts should have it listed

Mick

by **Sean82** » Sun May 04, 2014 7:04 pm

dr20t wrote:V7 forged piston short block

Use your liberty headgaskets. Sorry can't help with part number now but japanparts should have it listed

Mick

Call Kris at Rising Sun Subaru; he has all the part numbers

by **dr20t** » Sun May 04, 2014 7:26 pm

Part number is on my work email saved so will try remember to post it tomorrow