02 · Maintenance

Flywheel

Technical data and maintenanceFlywheel

Inside diameter of centre bush (bore) "a"
Crown wheel heating temperature for assembly on flywheel

47.010 ÷ 47.035 mm
80° ÷ 100°C

CONNECTING ROD - PISTON ASSEMBLY

Class A - Blue	81.952 ÷ 81.962
Class B - Pink	81.960 ÷ 81.970
Class C - Green	81.968 ÷ 81.978
Oversize 0.1
Height of seats of first seal ring "b"	1.520 ÷ 1.540
Height of seats of second seal ring "c"	1.510 ÷ 1.530
Height of seats of scraper ring "d"	3.010 ÷ 3.030
Pin hole diameter in pistons "e"	20.002 ÷ 20.007
Clearance between pistons and cylinders	0.038 ÷ 0.062 (*)
Difference in weight between pistons	± 5 g

(1): To be measured at right angles to the pin hole at a distance of 12.5 mm from the lower edge of the skirt.

(*) : 0.040 ÷ 0.060 for engine AR33503.

Small end bush hole diameter "a"	20.006 ÷ 20.012
Inside diameter of big ends "b"	44.000 ÷ 44.012	51.354 ÷ 51.366	53.897 ÷ 53.909
Difference in weight between connecting rods	≤ 5 g
Clearance between pins and small end bushes	0.006 ÷ 0.016
Small end end float	0.25 ÷ 0.6

Class A - Red	1.536 ÷ 1.540	1.527 ÷ 1.531
Class B - Blue	1.539 ÷ 1.543	1.531 ÷ 1.535
Class C - Yellow	1.542 ÷ 1.546	1.535 ÷ 1.539
Undersize 0.127
Clearance between connecting rod pins and corresponding half bearings	Class A - Red	0.030 ÷ 0.056	0.026 ÷ 0.056
Class B - Blue	0.030 ÷ 0.056	0.026 ÷ 0.056
Class C - Yellow	0.030 ÷ 0.056	0.026 ÷ 0.056

Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.