2. Measure the camshaft runout using a dial indicator. If the measured value exceeds the standard (0.030 mm), replace the camshaft with a new one.
3. Use a micrometer to measure the cam lobe height as shown in the figure. If the measured value is not within the standard, replace the camshaft with a new one.
Note:
Standard cam height:
- Intake: 42.34 mm.
- Issue: 40.37 mm.
Minimum cam height:
- Intake: 42.27 mm.
- Issue: 40.30 mm.
[Based on website data: MAZBOOK.ru]
4. Using a micrometer, measure the camshaft journal diameter in four positions - in two mutually perpendicular directions (X and Y) at two points (A and B), as shown in the figure. If the measured values are not within the norm, replace the camshaft with a new one.
Note:
- Standard camshaft journal diameter: 24.96-24.98 mm.
- Minimum camshaft journal diameter: 24.93 mm.
5. Measure the oil clearance in the camshaft journals:
- Clean the camshaft journals and corresponding camshaft caps.
- Place the camshaft in the cylinder head with the rocker arms removed.
- Place a piece of round gauge equal to the width of the camshaft journal along the camshaft.
- Install the camshaft cover and tighten the bolts.
- Remove the camshaft cover.
- Measure the oil clearance in the camshaft journal at the most flattened part. If the obtained value exceeds the maximum permissible value, replace the cylinder head.
Note:
- Standard camshaft journal oil clearance: 0.035-0.030 mm.
- Maximum permissible oil clearance of the camshaft journal: 0.090 mm.
6. Using a dial indicator, measure the axial clearance of the camshaft. If the obtained value exceeds the maximum permissible value, replace the cylinder head or camshaft.
Note:
- Standard axial clearance of the camshaft: 0.07-0.22 mm.
- Maximum permissible axial clearance of the camshaft: 0.23 mm.