fishunt Posted February 6, 2016 Share Posted February 6, 2016 99 legacy outback 2.5 dohc was swaped out for a 99 2.2 which is gen 2 and needs gen 2 intake but idle air controlers are different. How hard would swapping the harness and ecm be? Would that work? Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted February 6, 2016 Share Posted February 6, 2016 Nope. Doesn't work. You can put the 2.5 heads on the 2.2 block. Or just get another 90-98 2.2. Need a 95-98 manifold and wire harness. Need a manifold with EGR if you need to pass emissions inspection. Quote Link to comment Share on other sites More sharing options...
fishunt Posted February 6, 2016 Author Share Posted February 6, 2016 Nope. Doesn't work. You can put the 2.5 heads on the 2.2 block. Or just get another 90-98 2.2. Need a 95-98 manifold and wire harness. Need a manifold with EGR if you need to pass emissions inspection. can I swap to gen 1 2.2 heads and intake with egr. Any valve clearance issues . Quote Link to comment Share on other sites More sharing options...
AdventureSubaru Posted February 6, 2016 Share Posted February 6, 2016 (edited) works fine to put the phase 1 2.2 heads on the newer 2.2. Should be same process as the typical frankenmotor on here. Edited February 6, 2016 by AdventureSubaru Quote Link to comment Share on other sites More sharing options...
fishunt Posted February 6, 2016 Author Share Posted February 6, 2016 Nope. Doesn't work. You can put the 2.5 heads on the 2.2 block. Or just get another 90-98 2.2. Need a 95-98 manifold and wire harness. Need a manifold with EGR if you need to pass emissions inspection. Will putting 2.5 heads on the 2.2 still make it subject to head gasket failure. Quote Link to comment Share on other sites More sharing options...
AdventureSubaru Posted February 6, 2016 Share Posted February 6, 2016 yep. Guys report better reliability off of the turbo gaskets. Do a search for the part number. The other question is the reliability of the 2.5 heads to begin with. If a rod/rod bearing went out it's often overheating or oil starvation that causes it. It can stress other things. I'm partial to the straight 2.2 swaps. They were way more forgiving and very reliable. Quote Link to comment Share on other sites More sharing options...
ocei77 Posted February 6, 2016 Share Posted February 6, 2016 Once replaced properly, the 2.5 dohc engine is reliable. As long as the block was not continually overheated, putting undue stress on the bearings. 2.5 heads on a 2.2 block just requires the special Cometic gasket that matches the cooling ports. O. Quote Link to comment Share on other sites More sharing options...
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