Checks and inspection crankcase

• Position the camshaft intake side in a vice fitted with protective jaws.

1. Using tool no. 1.822.147.000, slacken and remove the timing variator from the camshaft.

1. Remove the stop ring and remove the outer body (a) of the variator pinion (b), spring (c) and the piston (d).

WARNING: When refitting the timing variator, follow the instructions given below:

• Make sure that the mastic on the thread coupling the timing variator to the camshaft does not obstruct the oil ducts.
• Wait for about two hours before assembling the shaft on the cylinder head.

CHECKS AND INSPECTION CRANKCASE

• Visibly check the crankcase for cracks and signs of excessive wear of the sliding surfaces; check that all the threads are intact.
• Remove the lubrication and cooling groove caps and clean the ducts with a suitable detergent, then dry with a jet of air and fit new caps.
• Accurately remove any traces of seals or sealants from the crankcase surfaces.

Checking the cylinders

1. Using a bore gauge fitted on a dial gauge, measure the inside diameter of the cylinders and check that it is within the specified limits.

Maximum cylinder taper
0.010 mm

Maximum cylinder ovalization
0.005 mm