Posted By: wvjohn
2007 qc 3500 6.7 cummins overheating - 08/04/15 02:41 PM
hi, i have 2007 6.7 cummins qc 3500 with only 85,000 miles, started to run over 200 deg. changed thermostat, bled all air, ran cool for a few days. system seems to be pressurized loosing coolant sometimes out the recovery tank,other times no noticable leaks, but loosing coolant.any ideas would be appreciated. still has egr system. thanks john