Join Date: Jan 2006
Location: Northern NJ
Car Year: 2014
Car Model: Impreza Ltd
Feedback Score: 6 reviews
This comes up a Lot, now fit vs function.
Any of those engines will fit and bolt up, but engine management becomes the real concern, ie MAP vs MAF, EGR or no EGR, AVCS vs none.
Also be aware, a DOHC intake may not bolt up to a SOHC set of heads and vice versa. Some early 2.2L engines WOULD accept the 96-99 DOHC intakes. But that ended with the introduction of the 97 EJ heads.
1st the 99, It came from the factory as a SOHC MAF engine. So just about any 99-05 engine will work so long as you bolt on your intake and sensors. You MAY have to also use your cooling crossover pipe ( single coolant sensor vs 2 sensors ) and be certain it is the same EGR or EGR-less as far as the rear drivers head port attachment.
Same goes for the 2003 OBS .... also built as a SOHC but here a MAP engine. Same rules as above.
The EJ engines built from 1989 thru current ( 2013 Turbo's still use the EJ engine ) have been referred to a Lego blocks. Just about any will bolt to any. Biggest difference to getting it to start and run is engine management.
98S, 2014 Impreza 5 dr Ltd (9 Subaru's since 1978, 7 were 5 sp) ILuvSubaru's
Last edited by ferret; 11-29-2012 at 04:17 AM.