engine work done today

Todays work included measurements done on the piston and the slip rings along with measurements on the bore.

First thing was to do a visual check on the pistons and bores.
- piston 1 had a small chip out of it
- piston 4 had 3 small indents on the surface

- bore 3 had 3 pores rust marks around the centre on the stroke section
- bore 4 had 2 long scratches oposite each other on the stroke section. this looks like it has been corsed by someone not being more carefull when removing the piston from the bore.

Next i checked each pistons diameter. this measurement is taken from 90 degrees from the gudgeon pin.
- piston 1 = 78mm
- piston 2 = 78mm
- piston 3 = 78mm
- piston 4 = 78mm

next set of measurements were for the bores. each bore had to be measured 6 times. once at the T.D.C, once at the middle section and once at the B.D.C.  then you must do this twice on X and Y of each bore.