Subaru 2.5L Turbo Engine Build - EJ255 Long Block & Engine Reassembly

The heads go back on, then everything else!

Build specs:
-JE forged pistons (2618 alloy 99.75mm)
-ARP2000 11mm head studs
-King rod & crank bearings
-Cometic 1.2mm head gaskets
Everything else is reconditioned/rebuilt.

It was quite the process getting it all back together. I wound up assembling the heads and cams about 4 times total. The shop I brought them to made a potentially fatal (but fixable) mistake.

I actually thought I messed up my valves when first doing the timing- I rotated the sprockets incorrectly and thought I might have bent a valve. I did a leakdown and it showed terrible results, which is the actual reason I pulled the heads off, which then led me to finding the grit in the oil passages. The actual reason for the leakage was some crud that found its way into the valve seats when I was wire brushing something else. This was too confusing to include in the video so I left it out for the sake of simplicity. It was actually a blessing in disguise I did this, because otherwise I wouldn't have found the grit, or the sticking valve. The shop owned up to their mistake and re-cleaned them and fixed the valve.