REPLACED HEATER CORE, THEROMOSTAT, WATER PUMP AND HEATER CHECK VALVE. THREE HOSES GONG INTO CHECK VALVE ARE HOT. HOSE FROM THE WATER PUMP WARM. COULD THERE BE A AIR POCKET WITHIN THE SYSTEM KEEPING HOT AIR FROM INSIDE THE TRUCK? IF SO,, HOW DO I GET THE AIR POCKET OUT? COULD IT BE POSSIBLE THAT THE LINE FROM THE WATER PUMP IS BLOCKED? THANKS FOR YOUR HELP IN THIS MATTER, NEED HEAT! MUFFDIVER
Jan 17, 2010 at 12:06 PM