Quote:
Originally Posted by seningen
My guess is you have thrust wear. The motion of the pistons going up and down have a component of pushing against the wall. Partly due to geometry of the rods/wrist pins and probably gravity as well...
|
That makes sense. All of the scuff marks are on the top (as in top of the engine, not top of the cylinder) and bottom, which is what I would expect for thrust wear.
I had a closer look at the pistons. There is only normal wear on the skirts as far as I can see (not that I am an expert), the rings look like new and turn easily in their grooves, the rod bushings are tight when I try wiggling the rods laterally.
Boxster
Threaded Mode
