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Old 06-21-2007, 07:30 PM   #58
sfv_rider
Registered User
 
Join Date: May 2007
Location: Los Angeles
Posts: 61
My Ride: '03 330i
Most of the posters who have been insistant on the vent tube have mentoined the buildup of hydrogen gas prompting the need for the vent tube.

A secondary concern is the minute particles of acid that are carried out with the gases. These corrosive gases are bad news - damaging the adjacent materiels and building up as a corrosive white goo on the negative terminal.

You really need the tube - don't short-change yourself when changing the battery.
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