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Old 04-20-2017, 09:51 PM   #1
free07110
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Default 98 outback ej25d swap options

Needing input. Came across a cheap low miles 98 that got ran low on oil. Rod knock. Going to buy it this weekend. I'm going to assume the heads are trash too. What's my options to swap a different engine? If the heads are ok when I tear it apart I will rethink my options. Is the certain engines that are a easy swap. Rather not mess with Ecu and harness but will if I have too. I read that some people swap short blocks but havent seen any threads that complete different long blocks will work.
This is a $200 outback with 140k on it. Thinking I could even get a complete donor car if needed too. Please help me with input.
Thanks
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Old 04-21-2017, 08:40 AM   #2
Charlie-III
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I've seen a few Subaru with rod knock and the heads are fine. You can get a wide range of NA 2.5L blocks and bolt the heads on. This keeps most sensors that the original ECU is looking for.
Based on miles, I would do almost all external seals (crank, cam, check oil separator, valve cover) as well as a full timing set.
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Old 04-21-2017, 08:45 AM   #3
Charlie-III
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Old 04-21-2017, 02:00 PM   #4
lpxltt
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I've swapped in an EJ22 to a 2.5d car. Keep the 2.5 intake manifold.

There are certain years where this works, other years the intake does not line up. You will need a new header if you go single port heads though.
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Old 04-23-2017, 09:32 AM   #5
free07110
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Thinking about just swapping 2.5 short block from a newer year if heads are good. Do you know what years short block will work? Read that come 2.5 short blocks have different piston styles and will contact heads. Any input would help. Thanks
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Old 04-23-2017, 10:09 AM   #6
Charlie-III
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Quote:
Originally Posted by free07110 View Post
Thinking about just swapping 2.5 short block from a newer year if heads are good. Do you know what years short block will work? Read that come 2.5 short blocks have different piston styles and will contact heads. Any input would help. Thanks
From the other thread you asked in.......https://forums.nasioc.com/forums/sho....php?t=2827091
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Old 04-27-2017, 11:37 PM   #7
wtdash
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Quote:
Originally Posted by lpxltt View Post
I've swapped in an EJ22 to a 2.5d car. Keep the 2.5 intake manifold.

There are certain years where this works, other years the intake does not line up. You will need a new header if you go single port heads though.
Phase 1 engines (those prior to '99) SOHC and DOHC can NOT swap intake manifolds.

Phase 2 shortblock - '99-'2005- should work....but.....USMB is your friend for this swap. ....or just about any Subaru forum should have this w/a bit of searching.

Cheapest, get it back on the road, is the '95-'98 EJ22 - $<500. You'll need the exh. mani./ y-pipe for the '96-'98 Single-port exhaust.
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