I have noticed that there are basically 3 liners available for the 355...they have different color codes.....what is the difference? Seeing that there is only one piston PN and only one ring set PN surely the differences in liners can't be I.D. dimension variations between the 3....correct? TIA for responding.
There are two liner colors, red (rossa) and green (verde) B20 And There are two piston color codes (same) B34 The difference is 0.010 mm or 0.000,4 inches Inidentally, the 360 pistons are 0.000,1" smaller (dimension 3) than the F355 pistons (the rest of the number are the same).
Thanks Mitch I didn't see any color coded pistons in my parts man........where did you find this? I also didn't see any piston ring sets that were color coded which would be necessary to match to the different pistons. Houston we got a really big problem here......40% leak down thru the crankcase with new liner and ring set on used piston.........YIKES!!!
Rings expand and contract applying outward pressure on th eliner--thus, there is no reason to need a color code--however, you still have to insure the ring gap durring assembly. Data found in the Workshop manual I downloaded from a link found on this site a couple months ago.
Thanks again Mitch. I couldn't find my workshop manuals earlier because they were packed away but dug them out a couple hrs ago and read the engine assembly section which cleared everything up.
Being a cylinder, ring gap increase times pi for every thousands of an inch - if the cylinder is .001" too big, ring gap will be approx. .003" bigger. I still don't buy Ferrari's drop in liner theory on these engines anyway. I've never measured bore distortion with a head torqued on one of these engines. Maybe I will do it this weekend, just for the data. I use a torque plate and file fit rings just for my own peace of mind when refinishing these liners.
