Lifted92
Junior Member
I have a 2007 Dodge ram 2500 with the 5.7 Hemi. A couple weeks ago I replaced the water pump due to the bearing going out, I also replaced the Thermostat while I was there. Filled the radiator and puke tank and let the pickup get up to temp with the radiator cap off. Thermostat opened around 205° and sucked coolant down, it was refilled and the cap was put on whenever it leveled off and the heat was hot.
Fast forward to the next day and I lose heat during the massive cold spell and have never gotten it back. I have tried the same bleeding procedure about 3 more times to no avail. During this time the engine ran normal temp with no other issues.
Now a couple days ago after using the pickup for over an hour it overheated on the highway and I cannot make it more than 2-3 miles without this thing overheating. We have since used a pressure bleeder to pull the air out of the system with a vacuum and replace it with coolant and it didn't seem to help in any way. while it was sitting there idling the coolant/engine never overheated but it kept surging out and never really leveled out, however the heater actually got hot this time. Put a new radiator cap on, the system pressurized and I drove it less than 1/4 mile and it overheated again and lost heat in the heatercore at the same time. I know there is flow through the thermostat from when we bled it last but I am completely lost on what to try now.
Does anyone have any ideas what could be the issue and/or how to solve it? Thanks in advance for any help, it sure is appreciated
Fast forward to the next day and I lose heat during the massive cold spell and have never gotten it back. I have tried the same bleeding procedure about 3 more times to no avail. During this time the engine ran normal temp with no other issues.
Now a couple days ago after using the pickup for over an hour it overheated on the highway and I cannot make it more than 2-3 miles without this thing overheating. We have since used a pressure bleeder to pull the air out of the system with a vacuum and replace it with coolant and it didn't seem to help in any way. while it was sitting there idling the coolant/engine never overheated but it kept surging out and never really leveled out, however the heater actually got hot this time. Put a new radiator cap on, the system pressurized and I drove it less than 1/4 mile and it overheated again and lost heat in the heatercore at the same time. I know there is flow through the thermostat from when we bled it last but I am completely lost on what to try now.
Does anyone have any ideas what could be the issue and/or how to solve it? Thanks in advance for any help, it sure is appreciated