engines
We remove the crankshaft and install it during the overhaul of the engine.
If the valve does not fit snugly against the seat, gaps will form in some areas of the valve and seat. In this case, gases under pressure and at high speed pass into the formed cracks, therefore, in this place the chamfers are subject to strong corrosion and the adhesion of the valve to the seat deteriorates.
In figure 1, a diagram of the Foton Aumark ISF3.8 CM2220 electronic engine control system without SCR from 2010
The engine is dismantled for overhaul. Conditionally, the engine has already been removed from the car.
Motor mounts removed and engine mounted on a frame or stand
The removal of the camshaft was discussed in the article - "How to disassemble the ZMZ-402 engine »