I found this nifty instruction manual online (direct PDF link). It says it’s for an STI but looking over the directions and illustrations it looks identical to the other 2.5 DOHC engine instructions. In fact comparing it to the endwrench.com manual, it seems much simpler.

 

One question I have is, why in this manual, do they insist you reset the tensioner using a vertical press and NOT a lateral vice like we all have in our garage???

 

Anyone see a problem using this guide for my upcoming timing belt replacement?

The only difference with the sti and wrx t-belt is that there is one more small pulley by the tensioner.

 

It's fine to use a vise to compress the tensioner. I use a big c-clamp myself. The big thing is to go slowly. If you go too fast you can ruin the tensioner.