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Old 11-29-2012, 08:11 PM   #3
vectorit
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Join Date: Jun 2007
Location: Southern California
Posts: 7,617
Re: Coolant level dropping fast

Check your heater box, and does the cab smell like coolant?
Put your hand up under the dash in the passenger area, feel the carpet for wetness and pull it up to see if the jute padding is soaked.
A pin hole in the heater core will leak off mostly vapor, causing the radiator coolant level to drop about as much as you are losing.
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1968 K20 Suburban
1972 K10 LWB PU

Last edited by vectorit; 11-29-2012 at 08:19 PM.
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