See also:

Compass Variance
Compass Variance is the difference between Magnetic North and Geographic North. To compensate for the differences the variance should be set for the zone where the vehicle is driven, per the zon ...

Tire Terminology And Definitions
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Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of coolant, and to ensure that coolant will return to the radiator from the coolant recovery bottle. The cap should be inspected and cleaned if the ...