You carry out removal of a head of the block of cylinders on the cold engine in the following order:
– dump pressure in fuel system;
– switch off ignition and disconnect a wire of "weight" from the rechargeable battery;
– merge cooling liquid;
– take off a belt of the drive of hinged units;
– remove the generator;
– uncover a head of the block of cylinders;
– remove throttle knot, nozzles and the distributive fuel highway;
– remove an inlet collector;
– remove a final collector;
– remove a chain and asterisks from camshafts;
– remove camshafts and pushers;
Fig. 3.54. An arrangement of the regulating oil valve (OCV) in a back part of a head of the block of cylinders
– remove the regulating oil valve (OCV) (see
Fig. 3.79. Places of connection of components to a head of the block of cylinders from the driver: 1 – cooling system hoses; 2 – suppressor of a radio noise; 3 – "mass" wire; 4 – sensor of position of the camshaft; 5 – electric socket of the sensor of oxygen; 6 – sensor of temperature of cooling liquid; 7 – oil pressure sensor
– mark and disconnect hoses of the cooling system and all electric wires and sockets
from a head of the block of cylinders
Fig. 3.84. Sequence of tightening of bolts of fastening of a head of the block of cylinders
– a six-sided key on 10 mm, in the sequence, the return to tightening, gradually weaken, and then turn out completely bolts of fastening of a head of the block of cylinders (see
Fig. 3.80. Use of the screw-driver for separation of a head from the block of cylinders
– remove a head from the block of cylinders. If the head sits very densely, the screw-driver from outside, an opposite chain of the drive of the gas-distributing mechanism, separate a head from the block of cylinders
When replacing a head of the block in the cooling system it is necessary to fill in fresh cooling liquid.
Fig. 3.81. Use of a scraper for cleaning of a privalochny surface of the block of cylinders
Privalochny surfaces of a head and the block of cylinders have to be absolutely pure. For their cleaning use a firm plastic or wooden scraper
. When cleaning be careful as it is very easy to damage aluminum alloy. Make sure that the deposit did not get to canals of the lubrication system and cooling. It is especially important for the lubrication system as the deposit can block supply of oil to engine details. If necessary clean channels. If pollution got to cylinders, remove them with the vacuum cleaner from there.
Check privalochny surfaces of a head and the block of cylinders: on them there should not be notches, deep scratches and other damages. Small defects can be eliminated with machining. At major defects of a detail are subject to replacement.
Tap clear a carving of openings for bolts of fastening of a head of cylinders in the block. Clear openings under bolts in the block. Vvorachivaniye of a bolt in the opening filled with oil can break off the block because of hydraulic pressure.
You make installation in the following order:
– establish details and knots which were removed from a head of the block of cylinders;
– check that the directing plugs are installed in the block of cylinders;
Take new laying of a head of the block of cylinders from packing just before installation.
Fig. 3.82. Arrangement of marking (1) of laying
– install laying on the directing plugs, at the same time the inscription "top" has to be directed to a head, and marking of 1
of laying to settle down from the back party of the engine;
Fig. 3.83. Places of drawing a layer of RTV sealant on laying of a head of the block of cylinders
– apply on laying a layer of RTV sealant 2,5-3,0 mm wide in the places shown in
– install a head on the block of cylinders, without violating the provision of laying;
– apply on a carving and under heads of bolts a thin layer of engine oil, insert bolts of fastening of a head of the block of cylinders and tighten them by hand;
– in the sequence shown in
in two stages tighten bolts of fastening of a head of the block of cylinders:
– the 1st — tighten the moment 79 N • m;
– — tighten the 2nd on a corner 90 °.
Further additional pulling up of bolts of fastening of a head of the block of cylinders is not required.
Further installation of a head of the block of cylinders is carried out to the sequences, the return to removal, taking into account the following.
Check and, if necessary, adjust gaps of valves.
Fill in cooling liquid.
Establish a new oil filter and fill in engine oil in the engine.
Launch the engine and check for lack of leaks.