Yes, stupid auto correct and me not catching it. The vacuum can draw it into the engine where it is consumed and burnt. If it is leaking at the rear of the master cylinder it can eventually deteriorate the [SIZE=10.5pt]diaphragm [/SIZE]in the booster or rot out the booster case causing a loss of power brake assist. Or you may notice that you sometimes hear a vacuum leak when pressing the brake pedal.
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