steve56 Posted May 13, 2019 Share Posted May 13, 2019 Have good 2001 ej25 block and a set of good 2009 ej25 heads. Can these be used together or do I need to find a newer block? Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted May 13, 2019 Share Posted May 13, 2019 The compression will be low unless you swap the pistons, and the 2001 block has the wrong PCV system so it will need to be adapted. GD Quote Link to comment Share on other sites More sharing options...
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