Checking the oil pump

• evenly heat the new ring gear to 80° + 100° C and fit it on the flywheel: leave to cool naturally, do not force cool.

Checking the oil pump

1. Check that the clearance between the pump casing and the driven gear is within the specified limit.

1. Check that the clearance between the pump cover rest surface and the upper side of the gears is within the specified limit.

WARNING: If the clearances measured are not within the specified limits, change the front crankcase cover with oil pump incorporated.

• Using a torque meter check the characteristic values of the engine oil pressure limiting valve control spring.

INSTRUCTIONS FOR RE-ASSEMBLY

For re-assembly operations reverse the sequence described for dis-assembly, unless otherwise indicated below.

• Check valve tightness when the cylinder head assembled (see "Turning the valve seats").

Reassembling the crankshaft

• Assemble the crankshaft on the crankcase complete with half bearings and half thrust rings.

Reassemble the half thrust rings with the grooved surfaces facing the crankshaft.

1. Assemble the main bearing caps complete with half bearings on the supports and tighten the fastening screws two or three times starting from the centre main bearing cap.

The position of each cap is given by a series consecutive notches (from zero to four starting from the front of the engine) etched on the caps themselves.

96 + 119 Nm
9.8 ÷ 12.1 kgm