carkid Posted August 25, 2015 Share Posted August 25, 2015 I have a 1999 Legacy GT with the 2.5L EJ25D (dohc, phase 1) and I want to swap the heads. Now I know that I'll need new 2.2L heads with dual port so I don't need to change my exhaust, and I've read that you need a new timing belt. (Donor car will likely be 1995 Legacy 2.2L) Now here are the issues: - Do I need to use the 2.2 head cam sprockets or can I use the ones from the 2.5?- Besides the previous question, do I need anything else other than the 2.2 belt for the timing system?- The bolt pattern for the 2.5 manifold I have has bolts in a straight line, however the 2.2 heads I've seen (1995 and older) have diagonal bolts.- Can I use the 2.5l head bolts? I have a new set which I will use. 14mm 12 point.- Is the bolt pattern the same? My current one has 6 bolts, 3 on top behind the top cam, and 3 down low behind the bottom cam.- If the donor engine (2.2L) didn't have HG issues should I still get the heads planed by a machine shop?- Should I get new valves seats/guides/valves/springs or is that overdoing it?Pics are here (2.5l head, block and manifold): http://imgur.com/a/ExhsZ Quote Link to comment Share on other sites More sharing options...
wtdash Posted August 25, 2015 Share Posted August 25, 2015 (edited) HI and Welcome, 1. Use the sprockets that match the head....they may work but I'm not sure. 2. You'll have to compress the tensioner - hopefully you have the FSM (factory service manual) for instructions - do it wrong and it'll ruin it. 3. SOHC Intake Manifold must be used - NOT interchangeable between SOHC and DOHC. 4. No...use head bolts that match head...I 'think' they're too short for the SOHC. 5. Yes...ALL EJ-series share the same pattern. 6. Yes....all heads should be resurfaced B4 reinstall (@ least IMHO). 7. Depends....if the 2.2. is over 150K, probably. But wouldn't bother otherwise.....(I'm a hypocrite...my '96 EJ22 w/128K has a bad valve guide...so....yeah.) 8+. The 2.2 / EJ22 only had EGR on the AUTOMATIC-equipped engines. All EJ25's do/did. You CAN make it work w/the non-EGR port heads w/out drill/tapping.- Search for my post on it. 9+. Read up on what HG to use....it'll need to be a 2.5 bore, but there may be better versions for you....FRANKLY. BTW, Your '99 EJ25D is actually a 'hybrid' year, as it has the Phase 2 block w/the Phase 1 DOHC heads GL, Td Edited August 25, 2015 by wtdash 1 Quote Link to comment Share on other sites More sharing options...
lmdew Posted August 25, 2015 Share Posted August 25, 2015 I have a set of the HG you need to do this conversion. $20 less then costs. I got them, the box is still closed. Larry Quote Link to comment Share on other sites More sharing options...
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