Jump to content

Welcome to Ultimate Subaru Message Board, my lurker friend!

Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.

We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
  • Say hello and join the conversation
  • Subscribe to topics and forums to get automatic updates
  • Get your own profile and make new friends
  • Classifieds with all sorts of Subaru goodies
  • Photo hosting in our gallery
  • Meet other cool people with cool cars
Seriously, what are you waiting for? Make your life more fulfilling and join today! You and your Subaru won't regret it, we guarantee** it.

* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!

Serving the Subaru Community since May 18th, 1998!

Guest Message by DevFuse

- - - - -

1998 Legacy Outback engine swap.

  • Please log in to reply
4 replies to this topic

#1 jtcowart


    New User

  • Members
  • Pip
  • 3 posts
  • FT. Greely

Posted 21 March 2009 - 12:13 AM


I have a quick question about an engine swap I need to do. I am new to Subaru's but not to turning wrenches. the engine in my 1998 Legacy Outback (2.5 liter and 5 speed) just took a dump and I would like to replace it with a good used engine. I am located in a pretty remote part of Alaska and I dont have alot to choose from. It just so happens that someone in my town has a wrecked 2005 wagon with a 2.5 with 24,000 miles on it. I am pretty sure that the fuel injection and alot of the electronics will not match up but I am wanting to know if I can use the Long block portion and bolt my intake and electronics up to it?

If anyone can give me a little advice on this that would be great.

#2 jtcowart


    New User

  • Members
  • Pip
  • 3 posts
  • FT. Greely

Posted 04 April 2009 - 11:35 PM

No body has any help for me?

#3 idosubaru


    Elite Master of the Subaru

  • Members
  • 24,096 posts
  • East Coast

Posted 05 April 2009 - 07:47 AM

you are correct, this is not a direct swap. and the intake manifolds are not interchangeable.

the one way you could get it to work would be to swap the intake wiring harness from the 1998 onto the 2004 engine intake manifold. that's not terribly difficult, i'm just talking about the intake stuff, that's all.

the sucky part is that i think the cam triggers are different. there's a chance it'll work but the differences aren't clear to me so i can't speak to exactly how it would be done or if it would work for you. but i'm pretty sure this i the only hang up to the whole deal.

for instance i think the cams triggers are positioned differently (but i could be wrong). there's a possibility they aren't different and this is all a wash. or there's a possibility that you can just swap the necessary cams (the ones with triggers since your 1998 will have 4 cam sprockets and the 2004 will only have 2). then there's the possibility that it won't work at all.

that will be your only hang up if you can handle the engine harness swap.

the other option would be to bolt the 1998 heads and intake onto the 2004 block. but that would suck disassembling a perfectly good 2004 block.

#4 ShawnW


    Subaru Master Technician

  • Administrator
  • 12,955 posts
  • Denver, Colorado

Posted 05 April 2009 - 05:08 PM

If it has the older cam pickup design (6 and 7) on the new motor that isnt an issue.

If it has EGR you will need both to and even harder is making that system not throw cel's.

Youd be better off fixing it with a stock engine even maybe shipping one in from CCR or a JDM supplier.

#5 jtcowart


    New User

  • Members
  • Pip
  • 3 posts
  • FT. Greely

Posted 10 April 2009 - 11:27 PM

Thanks for the help guys. I would love to purchase one of those JDM engines but the shipping to my neck of the woods makes it cost nearly as much as the engine.
Thanks again,

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users