RE: Hissing noise.
my truck was just in for an oil change and i had them check mine. i was positive it was a pin hole in the coolant system somewhere. it was in fact the leakdown of the air conditioning. the a/c system cools and de-pressurizes etc and you will hear this noise. dont worry about it!
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2008 HEMI Ram Quad Cab Monster Mile Edition
2003 Yamaha R1
1968 Ford Bronco
1971 Ford Bronco
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