Venture V6-3.4L VIN E (1997)
7. Point the coolant testers toward any light source and look into eyepiece.
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Coolant protection reading is at point where dividing line between light and dark crosses scale on right.
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Temperature scale is reversed from a standard thermometer scale. Below zero readings are on upper half of scale.
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If readings are not clear, the measuring prism was not cleaned and dried or there was not enough fluid on measuring prism.
Calibrating Testers
NOTE: The coolant testers are factory calibrated and sealed and should not require adjustment. If adjustment is required, follow instructions
below.
1. Make sure coolant testers is between 21°C and 29°C (70°F and 85°F).
2. Using distilled water, take a reading. If reading departs from a 0°C (32°F) reading on scale, a correction can be made by adjusting screw on
bottom of the coolant testers.
3. Remove sealant covering screw.
NOTE: Do not remove screw from the coolant testers.
4. Turn screw in direction necessary to adjust reading to 0°C (32°F) line.
5. Reseal the screw using a silicone sealant.