First Generation Mazda Speed3 Turbo Replacement

The first generation of the Speed3 paired a K04 turbo with a 2.3l version of Mazda's MZR power plant found in many of its platforms. This was good for between 14-15 lbs of boost, and around 260 hp/280 lb/tq. A proper hot-hatch that can more than hold its own against other quick cars. Like every car, it does come with certain weak points such as motor mounts that fail very quickly.

This particular 2007 Speed3 arrived with complaints of oil smoke in the exhaust, oil consumption, and feeling a little sluggish. Oil smoke typically means leaking valve stem seals, piston rings, a clogged PCV system, or in the case of cars with a turbo, leaking seals in the turbo. The intake to the turbo was exposed, and some wear was noticed. With a strong candidate for the cause of the oil smoke observed, and knowing that the K04 turbo on this vehicle is known to suffer from bad oil seals after some time, it was elected to pull the turbo and have it rebuilt. Time to get to work. Follow along with the pictures for more details about the removal process.

With the turbo rebuilt it is time to reverse the process. We'll install the turbo with new hardware and gaskets, refill any lost fluids, and get the car back on the road. Follow along with the pictures for more details about re-installation.

After getting the turbo and exhaust system reinstalled it's a matter of reinstalling all the other bits and pieces that had to be taken off for access. Once every thing is wrapped up, it's time for a test run to see if that smoke in the exhaust has gone away.

So with no leaks, better turbo behavior, and no oil smoke in the exhaust, it looks like this one is a wrap.