Imagine for a moment that you own a Subaru Impreza WRX, Legacy GT, or Forester with the EJ25 2.5L DOHC Turbo engine. Life is pretty good right? Right! Until your valves burn, and you lose compression. Yeah having a Subaru with low compression is basically a death sentence because the cost to repair it is massive. The engine has to be removed, heads have to come off, be rebuilt, and the list goes on.
Alas – there is good news for the Subaru enthusiasts that are taking on this repair themselves and need to figure out valve clearances. I did this repair a while back and quickly realized that my feeler gauges were not metric (because they were ancient), which caused some challenges for the metric valve bucket sizing. So I made an excel file that converts inch sizes to metric and vice versa. It also lists all of the valve bucket part numbers so that you can order the proper sizes for your car. Oh, and I also included the Subaru valve clearance tolerances that were correct for my 2005 Legacy GT Limited. I’m not sure if they are the same for all Turbo DOHC EJ25’s or not. Do some research and use your best judgement! Below is a download link to my excel file tool that you will find helpful if you are measuring Subaru valve buckets.
Good luck and post any questions below!