Hello all just a quick question.....what exactly is the difference between phase 1 and phase 2......is it the cylinder head? any insight would be appreciated.....

Hello all just a quick question.....what exactly is the difference between phase 1 and phase 2......is it the cylinder head? any insight would be appreciated.....

Double over head cam engine (1) as opposed to single over head cam engine (2)

 

nipper

NASIOC has tons of information about swapping heads and differences, compression, etc if that's what you're looking for.

Phase 1 is 96-97 DOHC hydro lifter

Phase 2 is 98-99 DOHC solid lifter

 

(Phase one heads have a square spark plug tunnel, and phase 2 have sort of a diamond shape)

 

 

*edit* Sorry, I should mention this is for the EJ25D model engine