Technician B only is right, who says that to avoid warping the cylinder head, the engine must be cold before removing it.
The main task of the cylinder head is to close the discharge chamber of the engine from the top. The upper part of the engine is reached the cylinder head, while the lower part is the engine partnership.
The cylinder head sits on the engine and shuts off the combustion chamber. The gap that remains between the cylinder head and the engine is achieved by the head gasket.
If you notice abnormalities in the functioning of your engine, it is advisable to contact a garage as soon as feasible to prevent further injury.
To learn more about the cylinder, refer
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complete question is,
Technician A only
Technician B only
Both A and B
Neither A nor B