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Old 06-13-2006, 04:54 PM   #1
c0mrade
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Member#: 63281
Join Date: Jun 2004
Chapter/Region: MWSOC
Location: Lincoln, NE, USA
Vehicle:
1999 Impreza 2.5RS
Silver

Default Swap 1999 2.5 RS engine for 2001 2.5 RS engine

Hopefully I'm posting into a right thread. General question:

Were there any substancial changes to design between the two? My 1999 engine died, and I found a pretty cheap engine, exactlyt he same, from 2001 2.5 RS. I wonder if I'll run into any huge or unsolvable problems trying to do so.

Thanks in advance.
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Old 06-14-2006, 10:24 AM   #2
MY99 2.5GT
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Member#: 5030
Join Date: Mar 2001
Chapter/Region: MAIC
Location: Martinsburg, WV, USA
Vehicle:
1999 Legacy 2.5GT
05 Legacy GT 06 Armada

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Should be exactly the same. Both are Phase II motors with rear main thrust bearings and SOHC running MAP with no MAF.
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Old 06-14-2006, 10:28 AM   #3
Matt Monson
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Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

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Wrong place...
http://forums.nasioc.com/forums/show....php?t=1021622
There's a thread about it from last week in the right place...
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Old 06-14-2006, 11:23 AM   #4
c0mrade
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Member#: 63281
Join Date: Jun 2004
Chapter/Region: MWSOC
Location: Lincoln, NE, USA
Vehicle:
1999 Impreza 2.5RS
Silver

Default

thanks guys! but isn't '99 MAF and '01 is MAP? If so, do I need to do anything with ECU or harness, or will it work just fine?
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Old 06-14-2006, 11:39 AM   #5
Matt Monson
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Member#: 832
Join Date: Jan 2000
Chapter/Region: RMIC
Location: Teh Ghetto Garage, CO
Vehicle:
99 2.5RS, '85 911
'73 914 and 2012 BRZ

Default

As I said in that other thread, you just use your intake manifold and wiring harness on the new engine. The engine doesn't know the difference, it's the ECU that is different...
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Old 06-15-2006, 09:19 PM   #6
davis10
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Location: Bozeman, MT
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Quote:
Originally Posted by c0mrade
Hopefully I'm posting into a right thread. General question:

Were there any substancial changes to design between the two? My 1999 engine died, and I found a pretty cheap engine, exactlyt he same, from 2001 2.5 RS. I wonder if I'll run into any huge or unsolvable problems trying to do so.

Thanks in advance.
Its the same engine = easy swap
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