3. TROUBLESHOOTING
49
Visually inspect camshaft face and camshaft height for damaged, and camshaft and
bearing for loosening and wearing, replace as required.
Check camshaft for height dimension, if out of the service limit, replace the camshaft.
Standard
Service
Limit
Camshaft Intake Lift
32.40-32.80m
32.25mm
Camshaft Exhaust Lift
31.89-32.29mm
31.75mm
Check outside diameter of the camshaft, if less than the
service limit, replace the camshaft.
Standard Service
Limit
15.984mm 15.92mm
Camshaft wearing cause and to engine performance influence
：
Poor lubrication will result in camshaft abnormal wearing, such as, oil viscosity low,
impurity too much, and recycling oil little can’t let the camshaft surface forming complete oil
film to make the camshaft surface seriously worn in the high speed rubbing stat. Second,
installing precision problem, when the matching clearance of the camshaft journal and
camshaft seat or bearing is out of the service limit, camshaft rotation precision will lower and
contacting with the relative part produce deviation face to make abnormal wearing.
⑥
Timing gear
a
）
Check timing gear for engagement clearance with aligning two side mark on the gear.
