Maintenance and Upkeep Discussion HHR maintenance tips ranging from oil change intervals to brake pads and everything in between.

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Old 06-23-2013, 03:34 PM
  #11  
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When the battery is charging when it is 80 percent recharged the per cell voltage is 2.36 volts the battery will gas it is breaking down the h20 it will vent the Hydrogen and the oxygen, Hydrogen at 4 percent per cubic volume you have a potential bomb all it takes is a spark.
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Old 06-23-2013, 04:26 PM
  #12  
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Ever heard of "bilge gas" exploding a boat? Hydrogen in close quarters (like in the spare tire well of a HHR) is "bad". Not so much worried about the battery itself exploding.

GM may be a bit over protective, but it could happen.
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Old 06-23-2013, 05:22 PM
  #13  
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And thats the reason there is a vent tube that exits the bottom of the car, so there is no build up,, therefore lessens the probability quite a bit...otherwise we;d have cars blowing up all over the place, yes? If it was that bad GM would have never put them there for liability purposes. And lets not forget the thousands and thousands of hot rods with the batt in the trunk...two of them sometimes....
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Old 06-24-2013, 12:48 PM
  #14  
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...... and old VW bugs -
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