Pistons, connecting rods and cylinder bores (page 2 of 2)

5. Starting with No.1 piston, invert piston and with arrow on piston crown pointing towards REAR of cylinder block, insert piston into No.1 cylinder bore.
6. Position piston with bottom of skirt 25 mm (1.0 in) from top of cylinder bore.
7. Using feeler gauges, measure and record clearance between piston skirt and LEFT HAND side of cylinder bore 60 mm (2.4 in) from top of bore: l Piston to cylinder bore clearance = 0.171 to 0.207 mm (0.007 to 0.008 in)
8. Repeat above procedures for remaining pistons.

CAUTION: Oversize pistons are not available, if piston to cylinder bore clearance exceeds limits given, repeat check using a new piston; if clearances are still excessive, replace cylinder block.

Pistons and lst compression rings fitted to Engine Serial No. Prefixes 15P to 19P may be fitted to Engine Serial No. Prefixes 10P to 14P in engine sets only.

9. Check fit of each gudgeon pin in its respective piston, pin must be a tight, sliding fit with no perceptible side play.

10. Measure gudgeon pin diameter at each end and side of pin.

CAUTION: Renew gudgeon pin and piston as an assembly if diameters are less than specified or if excessive pin to piston side play is evident. l Gudgeon pin diameter = 29.995 to 30.000 mm (1.180 to 1.181 in)

11. Check connecting rod small end bushes for wear, check that gudgeon pin is a sliding fit in bush with no perceptible side play.

CAUTION: Small end bushes cannot be replaced, a new connecting rod must be fitted.