How do I know if I have an STI block?
You just have to look at the stamp on the block halves it will have either A or B stamped along the parting line where the case halves mate up if its a 257. There will be two stamps on one case halve and two on the other indicating size of the piston installed in its respective bore on that halve from front to rear.
How can you tell the difference between EJ255 and EJ257?
The EJ257 and EJ255 share the same block castings, crank, and rods. The difference is the piston dish and heads. The combination of the small chamber EJ255 head and shorter piston dome make the 8.4:1 CR. The EJ257 has a deeper head and taller dome, making 8.2:1.
What should the boost leak be on a Subaru Impreza?
For example if your turbo boosts 14 psi stock, then you don’t really want to put more than that while doing the boost leak test. Although the pictures shown will be from a 2004 STI, this same steps apply to all Turbocharged Subaru EJ22/25 Engines including Impreza, Legacy, WRX, Forrester, Outback..
Where does the boost leak tester go on a Subaru?
The turbo intake pipe is the plastic pipe that leads from the airbox to the turbo’s inlet. Again, since this turbo is a PITA to get to, its much more efficient to get to it from the turbo intake pipe. Remove the flex hose and install the boost leak tester just like in the pic. It should slide over the intake pipe without much effort.
What do you need to know about a Subaru long block?
It is everything, minus the intercooler, piping, hoses, and fluid reservoirs. Also known as Turn-Key. A complete long block strips away bolt-on components such as your turbo, manifold, and headers. A bare long block is the same thing, minus the valve covers, timing components, cams, and pulleys.
Why is my Subaru Turbo On Borrowed Time?
Because most people rarely, if ever, replace them. Left untouched for too long, the filter becomes clogged, and your turbo is starved of oil, which quickly leads it to an early death.