Attach a square flange A.70172 to each end of the beam (the side of the square is 150 mm and polished) and install the beam with flanges on identical prisms so that the surface of the housing mating to the beam is in the vertical plane. The deformation of beam 1 (Fig. 81) is checked by placing square 3 against the outer and side surfaces of flange A.70172 (2). If the beam is not deformed, the square will fit tightly. The magnitude of the deformation is checked with a feeler gauge. If the 0.2 mm feeler gauge passes on any flange, the beam must be straightened. The perpendicularity of the gearbox mounting surface relative to the supporting surface of flange A.70172 is checked using a square. The 0.2 mm feeler gauge should not pass. If the deformation exceeds the specified value, the beam must be straightened.
After all adjustments are made, the beam is thoroughly washed and the quality of the welds, the tightness of the beam, and the cleanliness inside the beam are checked (absence of burrs, chips and oil residues) and the cleanliness of the breather. Then the beam is painted on the outside to protect it from corrosion.
(The material is posted on the online resource: VAZbook)