Dismantling of a head of the block of cylinders is carried out in the following order:

– remove a head of the block of cylinders from the engine (see подразд. 3.2.5);

Fig. 3.44. Inlet collector: 1–butterfly valve case; 2–laying of the case of a butterfly valve; 3–top section of an inlet collector; 4–laying of the top section of an inlet collector; 5–laying of the bottom section of an inlet collector; 6–bolt of fastening of the bottom section of an inlet collector; 7–bottom section of an inlet collector; 8–bolt of fastening of the top section of an inlet collector

– unscrew bolts 6 (see fig. 3.44 ) fastenings of the bottom section of an inlet collector and remove section 7;

Fig. 3.45. Final collector: 1–nut of fastening of a casing of a final collector; 2–casing of a final collector; 3–a tube of removal of the fulfilled gases for verification of the maintenance of CO; 4–sections of a final collector; 5–nut of fastening of section of a final collector; 6–laying of a final collector; 7–hairpin of fastening of a casing of a final collector

– unscrew nuts 5 (see fig. 3.45 ) fastenings of sections of a final collector and remove sections 4;

Fig. 3.47. Camshafts and mechanism of a drive of the valve: 1–camshafts; 2–asterisks of camshafts; 3–coupling of a drive of the distributor of ignition; 4–bolts of fastening of asterisks of camshafts; 5–hydraulic pusher; 6–valve crackers; 7–top plate of a spring; 8–external spring; 9–internal spring; 10-a maslosjemny cap, 11 – a head of the block of cylinders, 12 – inlet and final valves; A–shestigrannik for wrench installation for fixing of camshafts from an otvorachivaniya of bolts of fastening of asterisks

– unscrew bolts 4 (fig. 3.47) of fastening of asterisks of camshafts, keeping them from a provorachivaniye a nut key for vyfrezerovanny on them shestigrannik of A and remove asterisks 2;

Fig. 3.48. Camshafts and covers of bearings of camshafts

– unscrew nuts of fastening of covers of bearings No. 1 and 7 (fig. 3.48) of a camshaft and remove covers;

– unscrew nuts of fastening of covers of bearings No. 3 and 5. Nuts it is necessary to turn on serially cross-wise on a turn half for one pass, until then while they cannot be turned on manually;

– remove covers of bearings No. 3 and 5;

– remove a camshaft of a drive of valves of cylinders No. 1, 3 and 5;

– unscrew nuts of fastening of a cover of the bearing No. 4 and uncover;

– unscrew nuts of fastening of covers of bearings No. 2 and 6. Nuts it is necessary to turn on serially cross-wise on a turn half for one pass until they cannot be turned on manually;

– remove covers of bearings No. 2 and 6;

– remove a camshaft of a drive of valves of cylinders No. 2, 4 and 6;

– take hydraulic pushers 5 (see fig. 3.47 ) from a head of the block of cylinders, put pushers in a storage place as removal for the subsequent their correct installation on the places;

Fig. 3.15. Compression of springs of the valve by the special adaptation and removal of crackers of the valve

– compress a valve spring the special adaptation (see fig. 3.15 ) and take crackers 6 (see fig. 3.47 ) the valve;

– remove the top plate 7 and springs 8 and the 9th valve;

– take the valve 12 of a head of the block of cylinders from the combustion chamber;

– remove other valves, clear valves of a deposit a wire brush, wash out them in kerosene and dry;

– place in separate plastic bags sets of klapanny mechanisms and mark packages for the subsequent correct installation of valves on the places;

– remove maslosjemny caps 10 by means of special capture.

– clear and blow the compressed air all carving connections of a head of the block of cylinders;

– clear and wash out in kerosene crackers, springs and nests, then carefully dry up them.

Recommendations about cleaning and sink of details of a head of the block of cylinders are provided in подразд. 3.1.7.

Operations of fault detection of camshafts and hydraulic pushers are described in подразд. 3.1.5.

Fault detection of a head of the block of cylinders of the AAA engine is carried out in the sequence described in подразд. 3.1.7.

Fig. 3.49. Profile of a saddle of the inlet valve: Z — the privalochny plane of a head of the block of cylinders; a= 38,3 mm; c= 1,4–2,0 mm; a= 45 °; b= 30 °; g= 75 °