interchanging engines

tassie outback · Post by **tassie outback** » Sat Jul 25, 2009 8:52 am

Hi,I have seized my ej 2.5 in a 97 outback,I think it is a sohc but how can I tell.?what motor can I fit to replace this.I can do an engine change but that is my limit,I thought all subi motors were the same but apparently the outbacks are a bit different....any ideas

AlpineRaven · Post by **AlpineRaven** » Sun Jul 26, 2009 9:54 pm

Fair enough - very simple pop open the bonnet check it out these two pictures -

This engine is EJ25 SOHC.

This engine is DOHC EJ20 (similar layout as EJ25)

The difference between SOHC and DOHC is there is 4 cams (2 cams per side) on DOHC (Dual Over Head Cam) where about SOHC has 2 cams (Single Over Head Cam (1 cam per side))

What happened to your engine - how did it seize up?
Cheers
AP

wrxer · Post by **wrxer** » Sun Jul 26, 2009 10:37 pm

if you have sohc keep it sohc, same with dohc. either will fit but there are probs with wiring and computers. blocks are the same you can bolt your heads on. there are differences between dohc heads at about 2000. early had inlet manifold bolts in straight line and later were staggered.
hope it helps

ScubyRoo · Post by **ScubyRoo** » Mon Jul 27, 2009 9:27 am

Double check the VIN plate. In my 92 lib its in the rear left hand corner of the engine bay next to the strut top, not sure about the outback. Otherwise It may be stamped on the engine, but may be covered by the inlet manifold? Not sure, sorry...

What'd you do to it exactly?

bobbyjimmy · Post by **bobbyjimmy** » Mon Jul 27, 2009 10:27 am

97 Outback will be an EJ25D DOHC.
Same motor as in the Liberty RX's of that era.