Pressure of oil in the engine

At small deterioration of cams of a camshaft them smooth out a grinding skin, at first coarse-grained, then fine-grained. Places metal at end faces of tops of cams saw round grinding a skin before elimination of sharp edges. At over 3 mm on length of a cam the shaft is subject to replacement. If camshaft cams are worn out on height, them grind on the special kopirovalno-grinding machine tool for camshafts. The cams of a shaft having considerable deterioration, it is possible to restore with the subsequent grinding.
After repair a shaft wash out and check height of cams. At deterioration of cams on height more than with 0,5 mm in comparison with nominal height a shaft replace, as at such deterioration filling of cylinders therefore capacity of the engine falls worsens.
If basic necks of a camshaft are worn out over admissible limits, them restore or chromium plating, and then grind. A camshaft bend measure by the special indicator and check on an average neck. The admissible bend (palpation) can be no more than 0,10 mm. If it more, it is necessary to correct a shaft.
On basic surfaces under shaft necks there should not be scratches and backlashes, and on cases of bearings there should not be cracks. After clearing and camshaft washing check a backlash between its necks and apertures of support on a cylinder head. To define a backlash it is necessary to measure diameter of a neck of a camshaft, to establish the bearing corresponding to it, to fix its case and to measure internal diameter of the bearing, then to subtract the second value from the first. The difference of values also is backlash size. Measure a backlash and the calibrated plastic wire. The admissible backlash can be no more than 0,2 mm.

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