IS 250 RWD V6-2.5L (4GR-FSE) (2007)
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Use the chart (Figure 1) to compensate for temperature of the tires when adjusting tire pressure. Use temperature compensation Example 1 for the
spare tire.
Example 1: Temperature Compensation - "Cold" Tires
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The vehicle has been parked overnight outside shop (vehicle has "cold" tires) and tire pressures are set to 31.9 psi.
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Workshop temperature is 68° F and expected lowest ambient temperature in the local area is to be 14° F.
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Subtract the expected lowest temperature (14° F) from the highest expected temperature (68° F) = 54° F.
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Using the tire pressure chart (Figure 1) find the intersection of the cold tire line at the point corresponding to 54° F and read off the value on the
tire pressure change axis. In this case it would be about 4.9 psi.
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The tires should be filled to:
31.9 + 4.9 psi = 36.8 psi
Example 2: Temperature Compensation - "Warm" Tires
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The vehicle has been driven to the shop on surface streets for about 30 minutes (vehicle has "warm" tires) and tire pressures are set to 31.9 psi.
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Workshop temperature is 68° F and expected lowest ambient temperature in your area is to be 14° F.
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Subtract the expected lowest temperature (14° F) from the highest expected temperature (68° F) = 54° F.
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Using the Tire Pressure Chart (Figure 1), find the intersection of the warm tire line at the point corresponding to 54° F and read off the value on
the tire pressure change axis. In this case it would be about 6.7 psi.
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The tires should be filled to:
31.9 + 6.7 psi = 38.6 psi
Example 3: Temperature Compensation - "Hot" Tires
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The vehicle has been driven to the shop on the highway for at least 60 minutes (vehicle has "hot" tires) and tire pressures are set to 31.9 psi.
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Workshop temperature is 68° F, and the expected lowest ambient temperature in the area is expected to be 14° F.
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Subtract the expected lowest temperature (14° F) from the highest expected temperature (68° F) = 54° F.
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Using the tire pressure chart (Figure 1), find the intersection of the hot tire line at the point corresponding to 54° F, and read off the value on the
tire pressure change axis. In this case it would be about 9.0 psi.
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The tires should be filled to:
31.9 + 9.0 psi = 40.9 psi