February 9, 200917 yr I think the 2.5 has the flat bottom and the 2.2 has the rounded bottom. The bolt pattern is the same. You will need a tube of RTV and there is a cup seal that sits over a tube in the back. Subaru item.
February 10, 200917 yr The 2.2 has a flat bottom and +1 to Shawn. They're interchangeable as far as I know. Twitch Edited February 10, 200917 yr by Twitch de la Brat Spelling correction
February 10, 200917 yr The 2.2 pan is 4 ats and the 2.5 is 5 qts. Personally, I would use a 2.5 pan on a 2.2 motor but not the other way around. I would want the extra capacity for cooling on the 2.5.
February 10, 200917 yr Author I'm going to put a 2.5 pan on a 2.2. Got a junkyard 2.2 for a swap into a 97 2.5GT but the, uh, geniuses at the pick and pull yard drill HOLES in the oil pans of all the engines for some reason! They couldn't take 30 seconds to remove the drain plugs?
February 10, 200917 yr The ones around here do the same thing. I think it is a regulation, like them not selling cats. Not sure though
February 10, 200917 yr Author I guess drilling a couple of holes in the lowest part of the pan assures that it drains completely- Sometimes the drain plug isn't in the lowest part of the pan, for reasons I've never understood.
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