April 21, 201015 yr I have a couple EA81 Engines laying around and a EA71 in my GL. I see according to the manual that the bore is the same, but the stroke is different. So maybe the pistons are interchangeable? how about the heads? Can you swap EA81 heads onto the EA71 block?
April 21, 201015 yr Pistons will interchange. Heads will not. EA81 pistons into an EA71 will lower your compression. EA71 pistons into an EA81 will raise the compression. GD
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