Payments review questions on timing components
A only
B only
Both A and B
Neither A nor B
The camshaft rotates at twice the speed of the crankshaft
The camshaft drive gear or sprocket is twice as large as the crankshaft sprocket
For every two turns of the crankshaft, the camshaft turns once.
The exhaust and intake valves each open once during four strokes
Valve lifters
Timing drive components
Both A and B
Neither A nor B
Hydraulic
Solid
Both A and B
Neither A nor B
One worn or dirty lifter
Low oil pressure
High oil pressure
Incorrect valve timing
One worn or dirty lifter
Low oil pressure
High oil pressure
Incorrect valve timing
.001 inch
.005 inch
.010 inch
.015 inch
Allow for increased port areas
Provide more valve area
Provide less restriction to the airflow
All of the above
A only
B only
Both A and B
Neither A nor B
A only
B only
Both A and B
Neither A nor B
A only
B only
Both A and B
Neither A nor B
Idler Shaft Sprocket
Camshaft Sprocket
Balance Shaft Sprocket
Crankshaft Sprocket
Broken camshaft
Bent valves
Broken crankshaft
No damage can possible occur
20,000 to 50,000 miles
40,000 to 50,000 miles
60,000 to 100,000 miles
There is never a scheduled belt change