Subaru Outback Forums banner

Replacing a 2.5L engine with a 3.0L

8737 Views 3 Replies 3 Participants Last post by  lockmedic
I have a cracked head on my '03 Outback 2.5L, how much of a problem is it "upgrading" to a 3.0L engine?

Are there compatibility issues with the transmission? Computer? Does anyone have any experience in this kind of thing?
1 - 1 of 4 Posts
I've done it; fairly recently in fact.

Trans and rear diff need to be swapped, computer and entire front body and engine wire harness and the dash harness need to be swapped, as does the cluster and a host of other things.

It's not terribly difficult, just time consuming and you pretty much need the donor car beside you (how I did it). I would NOT buy a used H6 engine only with aspirations of shoehorning it into an H4 car. You will go broke buying alll the stuff you need but didn't get.

Rolled LLBeans are cheap :)
1 - 1 of 4 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.