GMC, cylinder head replacement in Zevulun

GMC, cylinder head replacement in Zevulun.
The cylinder head must be replaced if it shows signs of oxidation and wear, or the following signs are noted: engine overheating, coolant leakage, oil or gas in the cooling system. To replace the cylinder head, remove the cover, the timing belt case, the pulley belt, the cylinder head mount and the cylinder head itself. Installation of the cylinder head is carried out in the reverse order.