Camshaft
The bearing journals of the camshaft are not allowed to have any scoring, nicks, scratches or dragging of aluminum from the bearings. The working surfaces of the cams and eccentric are not allowed to have any damage or wear marks in the form of faceting.
The camshaft is installed with its outer journals on two prisms placed on the test plate, and the radial runout of the remaining journals is measured with an indicator, which should not exceed 0.02 mm.
Camshaft Bearing Housings
Bearing housings must not have any cracks in any place. There must be no burrs or scratches on the bearing surfaces under the camshaft journals.
Check the clearance between the camshaft journals and the bearing holes. The clearance is determined by calculation after measuring the journals and bearing holes on the cylinder head with the bearing housings installed. The clearance must correspond to the data table 1if the gap is more than 0.2 mm, then the cylinder head with bearing housings is replaced.
Toothed belt
The toothed part surface must have a clear tooth profile, without folds, cracks, undercuts and fabric separation from the rubber. No traces of oil are allowed on any belt surface. There should be no delamination or fraying on the end surfaces, but slight protrusion of the fabric fringe is allowed. The surface of the outer flat part must be smooth, without folds, cracks, depressions and bulges.