Checking the cylinder head of the M62 engine for leaks must be carried out in the following order.
Prepare fixtures «11.1.477», «11.1.470», «11.1.471», «11.1.473» And «11.1.474». Remove and disassemble the cylinder head. Plug the holes in the cooling cavities with a tool «11.1.470».
Apply fixtures «11.1.477» And «11.1.471» on the sealing surface of the cylinder head and screw them with the cylinder head bolts.
Install fixture «11.1.473» on cylinder head, for cylinder head 1-4 (or fixture «11.1.473», for cylinder head 5–8). Connect a compressed air source to the cylinder head (pic. 4.53).
Immerse the cylinder head in a bath of water, if necessary, you can reduce the hardness of the water with detergents. Give a test pressure of 4.5 bar (kgf/cm2) and check the tightness of the cylinder head for cracks in the walls by the appearance of air bubbles.