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Showing results for tags 'Pistons'.
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I finally pulled the short block (SOA478H600R1) that I purchased a couple months ago out of the box and put onto a stand. Changed out the 7mm oil pump for a 9mm that I had (I don't think I'll need a 10mm as I'm a conservative driver, and this is just for a DD project). Looking at the pistons, they're labeled as 255 SH. Is this going to be a problem mounting with DOHC heads? When I was talking with a subaru parts tech over the phone I had specified that I wanted an EJ251 or EJ253 short block for '03-'05, and they had given me the part number. I had then talked with a different Parts Tech, and they confirmed that that part number was for what I had specified. Are the pistons the same? I thought the 255s were used with the AVL systems, and can't work with pre-AVLS. . Should I be looking for new pistons now? The current motor in my car is an EJ from a 2001 Impreza, with DOHC heads. I wanted to recreate the build as it is generally a nice and powerful (enough) motor. Also, I bought a brand new subaru water pump because I thought the stock one that came on the block was supposed to be forward facing.... What showed up is identical to the spare I bought. They are identical, right? Thanks all, Greg
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- frankenmotor
- dohc
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Hello, I'm new to Soobs and have a 96 2.5l DOHC Outback that needs the cylinders bored to .02 over. I was only able to find .02 over pistons for a '99 2.5l DOHC from NPR. I typoed the year and it should be '99 pistons in a '96.I measured them up and found them to be .046 shorter from the pin center line to the top of the piston. Also they are .211 shorter overall. And I think the valve depressions will still have .024 clearance, not sure though as the machine work has not been done yet and I am researching before I do it. So, is this an option? Or will I have issues. The information given by the members on this forum has helped me in the past and I am grateful. Thank you for your help.