If I remember correctly the brushes were Kozak Dry Wash brushes.
I don’t understand piston 4 running faster than the others. The rpm of all the pistons connected to the same crankshaft has to be the same as the crankshaft. A bent rod would decrease the piston speed not increase it.
I don’t understand someones assertion that a piston can’t be pulled out from the bottom. For years the 4 cylinder Offenhauser engines used in Indy and sprint cars had no heads. Even valve work had to be done from the bottom.
My 2012 Toyota has been wonderfully reliable, but I have never been lied to as much by any other car dealership than the dealer I bought it from. It seems to be ingrained in their culture.
All the years I bought Chrysler products, I never had a bad dealer experience, especially with warranty work.