jonathan909 Posted August 21, 2014 Share Posted August 21, 2014 Hi, folks - just discovered this board. I've got a '99 DOHC (Phase I) EJ25 (from my Legacy) that's got a trashed crank, but freshly machined heads. I can readily get my hands on a (year unknown) SOHC (Phase II) EJ25. Will the block swap directly in i.e. with my old manifold, heads, harnesses and hoses? Thanks much. Link to comment Share on other sites More sharing options...
idosubaru Posted August 21, 2014 Share Posted August 21, 2014 yes, use the correct headgasket - i think you match the headgasket to the block - but make sure all the coolant and oil passages line up properly. Link to comment Share on other sites More sharing options...
Ibreakstuff Posted August 21, 2014 Share Posted August 21, 2014 Either head gasket would work.. DOHC HG is a little bit thicker iirc, so the SOHC HG would raise compression ever so slightly. Link to comment Share on other sites More sharing options...
86BRATMAN Posted August 21, 2014 Share Posted August 21, 2014 The head gasket I recommend for this combo is the 04-07 sti headgasket. They're thinner than ej25d and multi layer steel unlike the pos ej251 gasket. Link to comment Share on other sites More sharing options...
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