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All DOHC 2.5 heads the same?
Posted: Wed May 24, 2006 9:43 pm
by Splinter
Ive got a line on some heads for a good price, but the guy doesnt know what car they came from
I know theres like a phase 1 and a phase 2 or something
soooo
Whats the difference, which one is better, and are there any markings on the heads to disguish them?
Also, how hard is it to find cam sprockets?
Posted: Wed May 24, 2006 11:18 pm
by DLC
Phase I EJ25 is DOHC
Phase II EJ25 is SOHC
There was a slightly lower power EJ25 in 1996, but the heads were probably the same. JDM and the new USDM heads featured versions of AVCS.
Chances are high that they're from a 97-99 Legacy.
Posted: Wed May 24, 2006 11:28 pm
by Splinter
Is that the same as a 98-99 RS?
Posted: Wed May 24, 2006 11:34 pm
by DLC
98 RS was DOHC, 99 was SOHC. Same for the Forester.
Posted: Wed May 24, 2006 11:41 pm
by Splinter
So the 98RS has the same heads as the 97-99 legacy?
Posted: Wed May 24, 2006 11:51 pm
by Matt Monson
Same as a '97-99 Legacy or Forester. But '96 DOHC Ej25 have hydraulic lash agjusters in the buckets. Later ones are shim over bucket...
Posted: Thu May 25, 2006 12:18 am
by Yukonart
DLC wrote:There was a slightly lower power EJ25 in 1996, but the heads were probably the same. JDM and the new USDM heads featured versions of AVCS.
This would require the use of an OBD-II ECU, or is the AVCS a more passive system than that?
Posted: Thu May 25, 2006 3:03 am
by napphappy
The forester shared heads with the RS, as was mentioned.
AVCS would be phase II, so you wouldnt be able to run them with a phase I ecu without major cam gear work. But I do believe you can the AVCS unhooked, or disengaged.
The 96 hla buckets will be a smaller diameter as well.
Posted: Thu May 25, 2006 3:08 am
by Splinter
But these should bolt right on after have oil and coolant lines for the turbo plumbed, yes?
And I have to change the cam sensor?