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Old 10-23-2004, 12:07 AM   #1
dan_j_b
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Default Swapping Parts from Phase I to Phase II Block

I am swapping long blocks on my 98 Legacy 2.5GT (5-speed). So I went and picked up a used 2.5 DOHC long block out of a 98 Outback (auto). I loaded it up and got it home and realized that it is actually a Phase II block! I am happy to learn this given their overall improvements over the Phase I that I"m pulling out (especially since I only paid $500 for it

This engine has had the intake and cam pulleys pulled from it. I was just wondering if I am going to run into any trouble getting parts from the Phase I to bolt onto the Phase II block (intake, cam pulleys, timing belt, etc)

Also this is my first time pulling an engine from a 5-speed tranny. Are there any bolts I need to take off before I seperate the engine from transaxle (other than bell housing bolts)?

Thanks
Dan
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Old 10-24-2004, 12:51 PM   #2
dan_j_b
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Well I got everything swapped out last night and everything worked out fine. The only differences I noticed are the different timing belt tensioner system and it appears to be an interference motor (when I turned the crank initially to line it up for the belt I could feel it hit valves in certain spots)
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Old 10-24-2004, 07:50 PM   #3
ImprezaVA
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Quote:
it appears to be an interference motor
The 1998 Outback had a Phase I interference engine, that's why you felt what you felt. It had 4 cams, right?

All Phase I DOHC 2.5's are interference. Phase II SOHC 2.5's are NON-interference and I think they were introduced in the Outback in 2000, but came out in 1999.

-Charles-

Last edited by ImprezaVA; 10-24-2004 at 08:14 PM. Reason: Misinformation
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Old 10-24-2004, 10:11 PM   #4
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all DOHC - interference
all SOHC - noninterference

known exception: Phase II EJ22 SOHC , 10:1 instead of phase I 9.5:1 that ran until like 98 or 99 (late model impreza, late 90s) - interference.
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Old 10-24-2004, 11:28 PM   #5
dan_j_b
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As I said before, it is a PHASE II block with DOHC heads, so it has the higher compression 10:1 pistons. You can say it isn't interference all you want, but you'll have to explain to me what else could keep the crank from turning all the way around with the timing belt off. As I read in several other posts, they used a few of these blocks on the later 98 production models before they switched to the SOHC design.
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Old 10-25-2004, 12:38 AM   #6
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The heads you bolted onto it made it interference. I noticed the same thing when I put mine together. I made sure the crank had all 4 pistons at midstroke before setting cam position. Once those were inplace, I moved the crank to #1TDC and finished the belt routing, etc...

Jay Storm
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Old 10-25-2004, 09:20 AM   #7
dan_j_b
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Yeah thats what I figured, Jay. Actually I didn't bolt the heads on, this is the way it came from the factory in the 98 Outback it came from.
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Old 10-25-2004, 01:20 PM   #8
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Interesting. The Legacy didn't get the Phase II till 2000, and the Outback IS a Legacy. What on the engine leads you to believe it's a Phase II?
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Old 10-25-2004, 03:00 PM   #9
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Quote:
Originally Posted by DLC
Interesting. The Legacy didn't get the Phase II till 2000, and the Outback IS a Legacy. What on the engine leads you to believe it's a Phase II?
Dave,
I was recently informed of this fluke by the folks a Colorado Component Rebuilders who do nothing but rebuild EJ's all day long. For some reason the '98 and '99 Outbacks got the phase II shortblocks but continued to use the DOHC heads...
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Old 10-25-2004, 03:53 PM   #10
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CCR would know, they probably rebuild more EJs than anyone else in the world. Good to know though, for those who want a factory hybrid.
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Old 10-25-2004, 05:30 PM   #11
dan_j_b
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Yeah, I had heard about this in old threads before. I could tell it was a phase II block by the single ridge marking on the top of the block, the newer style single piece cam tensioner and the extra tranny mount holes in the back to accomodate the newer trannys. I can't say that I notice a difference with the extra .5 psi compression, but then again, it had been a while since I drove it before the swap.
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