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Old 02-01-2011, 12:01 AM   #1
99imprezd
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Member#: 198964
Join Date: Jan 2009
Chapter/Region: Tri-State
Location: south NJ
Vehicle:
2004 WRX wgn, built!
WRB

Default Anyone know how to decipher an EJ25 engine serial number?

Just picked up a 2.5 motor im about to start building. For starters Ive got the heads, block and intake manifold with everything still attached. It has a 12 digit number etched on the top of the rear of the motor where the flywheel is.. 702724699295. Obviously this is not a VIN but maybe some sort of production number. Other markings are EJ25, FM-5, Z205 905. The heads are stamped V25, E25 & I25 marked valves also 061023B & 061020B.

Guy I got it from said it was from a 2004 2.5 but I wanna double check the numbers and see exactly what Ive got.

My plan, to build a 2.5 monster, but wna start with the basics..
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Old 02-01-2011, 04:48 AM   #2
overdrivex
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Join Date: Aug 2009
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Location: H-town
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2010 Impreza
camilia red

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on the middle timming cover there should me a id. EJ257XXXX
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Old 02-01-2011, 09:26 AM   #3
99imprezd
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2004 WRX wgn, built!
WRB

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Motor didnt come with the timing covers or water pump. The block is just the block with internals...
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Old 02-02-2011, 02:11 AM   #4
overdrivex
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camilia red

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sorry bud than your pretty much sol. the serial number on the block doesnt say anything about what kind of car or what year it went into other than what block it is. and im pretty sure you could tell that just by looking at it. as far as i know the only difference between a ej255 or a ej257 is one came in a sti and one was in a wrx other than that they are exactly the same.
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Old 05-19-2011, 09:04 PM   #5
bobbyseaman
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Join Date: Nov 2010
Rally Stuff 1997 suabru outback

hey i replace my motor with a new ej25 but i don't know what year it is. and im not to sure where the serial number is on the block i tryed by the trans there was a number and it was (084564) and another one by the alt. but idk what what is the number. im trying to find out what year motor it is because i think i need a ecu for that year because it idels at 2k all the time and i replace everything that was on fourms that had smiler problems but nothing worked so im going to try and replace the ecu if anyone could give me some help that would be great. thanks
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