SAME SILVER 100.4

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Fig. 4 - Installing tappets into the engine block.

Fig. 5 - Installing the 1000.4 engine governor

driving gear.

Fig. 6 - Inserting the camshaft bushings.

Fig. 7 - Camshaft.

Checking camshaft

Examine both camshaft journal and cam surfaces: they must be

thoroughly smooth and in perfect operating conditions.

If on the contrary cams show any sizing or scoring, it is convenient

that both the camshaft and the bushings installed in the block be

replaced. Only if a very small evidence of deterioration is noticed,

this might be eliminated using a very fine grain abrasive stone.

To check for wear, place the camshaft on the special cross-

shaped rests and apply a comparator feeler on each single cam

then rotate the camshaft.

Minimum cam lift should never be below specifications, otherwise

the camshaft should be replaced.

Checking camshaft bushings

Carefully examine bushing inside surface; should any seizing or

evident wear of the antifriction lining be found replace the bush-

ings.

If normal conditions are noticed, check the bushing inside

diameters by means of an internal comparator. If the bushing

inside diameters measured are in excess of the maximum wear

limits specified, these shall be replaced.

Each time the bushings are replaced they must be bored.

Checking timing gear

Be sure the gear teeth are not spalled or excessively worn.

Replace the gear, as necessary.

engine

camshaft

SAME SILVER 100.4 - Page 44