Since I had the 2.5L engine out of the 08 STI, I figured I might as well take it apart. I will re-assemble it with new bearings and use it in that 02 Bugeye I got a few months back.

This 2.5L motor is one that I assembled in my shop back in 2011. I ran the EFR7670 on it for most of that time, and switched to the EFR8374 last summer. On the 7670 is was running at 30psi, and about the same on the 8374.

Overall condition was not bad given the abuse and time ( 7 years ). The bearings are ACLs that were coated (Calico Coatings). The main bearings are smooth to the touch with no grooving that you can feel, but the coating is worn off in a number of places. A few lines from some contamination, but not enough to break the bearing surface.

The rod bearings have the typical wear pattern from a subaru, with the thrust half worn heavier on one side. The coating was pretty warn off on all 4 sets on the sides, and some contamination on the #4 bearing. Crank does not have any significant wear, but worth some polishing and balancing before rebuild.

The rods are a the rare Cobb rods. Not seen in the wild very much. 😉

The pistons are the most surprising.. they look fantastic for pistons that have been running for 7 years at high boost levels. Very little skirt wear. I’ll measure everything before assembly, but you can certainly see the effect of water injection on the crowns. If everything measures up, I’ll get new rings and bearings and build it back up and send it again.