June 1, 20169 yr Here is a picture of the different tooth profiles on T304(AA230) and T307(AA21B) timing belts. I'm rebuilding both a Legacy and Impreza. Legacy has two metal cam gears.Impreza has one metal and one plastic cam gear. I think they both engines use the same crank sprocket and toothed timing belt idler.I'm assuming the different Tbelt tooth profiles are due to the cam pulleys. If anyone knows please ad to post.
June 2, 20169 yr Author The Legacy is an 05 and the Impreza is an 07. Both engines have spun bearings.The 07 be getting a Jdm 2.0 short block with its current heads, The 05 will be getting a Jdm 2.5 short block with its current heads.
June 2, 20169 yr You don't want to put the ej25 heads on the ej20. The combustion chamber is roughly 5mm wider than the bore, leave the heads on the Jdm engine and swap intake manifolds and sensors.
June 2, 20169 yr Author You don't want to put the ej25 heads on the ej20. The combustion chamber is roughly 5mm wider than the bore, leave the heads on the Jdm engine and swap intake manifolds and sensors. Im a little foggy on a few details, but the 07 Impreza has variable valve timing so I need to use those heads so the ecm will be compatable . According to my supplier in the Seattle area I can use a jdm 2.0 or 2.5 shortblock with the 07 heads. My supplier doesnt have any ej20 or ej25s newer than 2005 so none of them have the variable valve timing heads. I already have a jdm ej20 from them that I'm getting ready to install in a different 2005 OBW. That one is a direct swap with just using the 2005 OBWs intake. Edited June 2, 20169 yr by steve56
June 2, 20169 yr You do need the avls components. But you cannot use those heads on the ej20 shortblock. Best bet is to just get two jdm ej25s and go that route. Using the ej25 heads on the ej20 will lead you to another engine replacement in short order. I've been doing this stuff for 15 years, guarantee I've built more motors than your engine importer.
June 2, 20169 yr Author You do need the avls components. But you cannot use those heads on the ej20 shortblock. Best bet is to just get two jdm ej25s and go that route. Using the ej25 heads on the ej20 will lead you to another engine replacement in short order. I've been doing this stuff for 15 years, guarantee I've built more motors than your engine importer. Appreciate your input. They probably said the same thing and I just misunderstood them. I'm a rookie on the jdm swaps.
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