HiCustomer Starter replacement is pretty straight-foreword on this car. The shims you are talking about are used to properly space the starter from the flywheel. They are thin metal strips with 2 holes in them, between the engine block and starter, and can only be put in one way. When you remove the starter, you simply re-use the exact same shims that are already there. If there arent any shims, install the new starter without shims. The only time you would add shims that weren't there before, is of the starter makes a loud wining sound when you start the car.
Here is a picture to show you where the shims go. You need to get a pack of shims from auto parts store. They will come in a variety of thicknesses. Starting with the thinest one, add them one at a time until noise is gone.
Yes, exactly. When you install the starter, only put the bolt closest to the engine block in first, and only turn it a couple turns-do not tighten it. Then you install the shim, open end goes around the bolt you just started. Then you install second bolt through starter and hole in shim. Than tighten both bolts.
Feel free to ask any more questions, I am glad to help.