Alfa Romeo alfa 33 Workshop Manual page 86

PISTONS, COMPRESSION RINGS AND PINS
Pistons
Inspection data
Standard
Piston diameter
" a " (I)
Oversize
First compression ring groove height "c"
Second compression ring groove height "d"
Oil scraper ring groove height "c"
Pin seat bore "b"
To be measured to right angle to the piston pin at 17 mm (0.6693 in) from piston skirt
Borg0 Piston
Mondial Piston
May 1983
ENGINE MAIN MECHANICAL UNIT
1200
79.96 +79.97 (3.1480 + 3.1484)
Class A (Blua)
Class B (Pink) 79.97 f79.98 (3.1484+3.1488)
Class C (Green)
79.99 + 80.00 (3.1492 e-3.14961
Class 0 (Yellow)
80.00 G-80.01 (3.1496 +3.1500)
Class E (White)
1st
80.35-80.37 (3.1634+3.1642)
2nd
3rd
1.775 + 1.795
4.015 G-4.035
0.1581 +0.1589)
Engir
1350
83.96 f 83.97 (3.3055 + 3.3059)
83.97 f 83.98 (3.3059 + 3.3063)
83.98 -83.99 (3.3063 + 3.3067)
83.99 + 84.00 (3.3067 + 3.3071)
84.00-84.01 (3.3071 f3.3075)
84.35f84.37
1.525 + 1.550
1.525 + 1.545 (0.0600 + 0.0608)
0.0699 + 0.0709)
1.775 + I.796 (0.0699 + 0.0707)
1.775 + 1.795
0.0699-0.0707)
(0.1581 -0.1590)
4.015 e-4.035 (0.1581 +0.1589)
4.015 e4.035
Unit: mm (in)
1500