Passat V6-2.8L (ATQ) (2004)
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Commercially available hydrometer
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Shop rags
NOTE:
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Checking specific gravity shortly after topping up with distilled water will result in erroneous readings. Charge battery after topping up with
distilled water, then check specific gravity.
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Minimum battery temperature of 10 degrees C (50 degrees F) is required when carrying out specific gravity tests.
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Specific gravity of all cells must be checked.
CAUTION: Before beginning repairs on the electrical system
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Switch off all electrical consumers.
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Switch ignition off and remove ignition key.
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Remove all battery cell caps.
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Dip end of hydrometer into cell and extract sufficient electrolyte to allow indicator float to swim freely (the greater the electrolyte density in
kg/dm3, the higher the indicator float position). Note each cell's specific gravity reading from float arrow-. Repeat sequence until all cells are
checked.
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Review noted values and compare with values in table below: