If you need to repair the cylinder head of the engine installed on the car, remove it as described in the article "How to replace the VAZ-2123 cylinder head gasket"
In most cases, repair of the cylinder head consists of lapping or replacing valves, replacing valve guides, replacing or grinding valve seats
In case of such malfunctions as a violation of the tightness of the channels of the jacket of the cooling system and warping of the mating surface to the cylinder block, the block head is replaced.
You will need: wrenches "for 13", "for 17", "for 21", a spark plug wrench, a screwdriver, round-nose pliers (tweezers), a device for compressing valve springs.
Disconnect the fuel pressure regulator hose from the nozzle on the receiver.
Remove the nuts securing the receiver to the intake pipe
Remove the receiver and the gasket installed underneath it
If there is a valve spring compression tool that differs in design from the one shown (for example, a screw screwed into the hole in the head of the block for the hydraulic support), it may not be necessary to remove the receiver.
For convenience, you can remove the intake pipe and exhaust manifold (see "How to repair the Chevrolet Niva exhaust system"), as well as the rest of the hinged components removed together with the head, however, if repair or replacement of these components is not required, with sufficient skill you can repair the block head without removing them.
Remove all spark plugs
Mount the valve spring compressor on the head of the block, place a suitable stop under the valve (for example, the head from the tool kit), compress the springs
Remove the crackers from the plate of springs
Remove the fixture, spring plate
Remove the springs
Remove the inner spring support washer
Remove the outer spring support washer
Remove the valve from the guide sleeve.
Remove the rest of the valves in the same way
Thoroughly wash the cylinder head and clean the oil channels of the head. We remove carbon deposits from the combustion chambers and from the surface of the exhaust channels with a metal brush.