Possible thermostat?
I have a 2008 ram 2500 6.7 with full deletes and 5" exhaust and a H&S mini max tuner.
This morning I started the truck with the remote start let it warm up for 15 minutes and pulled away,it was around 23degrees this morning I had heat and the truck had good heat. I pulled in to the car wash to cancel the car wash for the winter so I figured I would get the truck washed.
When I left the car wash I got out to put my antenna back on and noticed it was starting to blow cold air,I looked at the temp guage and it dropped to 150 and then to 140 this was on the temp on the mini max!
So I drove to the express way and it still was blowing cold.
After I got up to 60 mph it got heat for a few minutes but it went away!
Then the temp guage went to 200 then down to 180 so I got off the express way and it went to 220 then to 235 but no heat! I drove over the railroad tracks and all of a sudden the temperature dropped to 180 and the heat came back I drove it home about 2 miles and checked the coolant!! It had pressure in the system but the coolant resiviour was over full it took about 2 quarts in to the radiator and I started it back up, no air bubbles or blowing the coolant out and it had good heat and not running hot!
I got on to the express way and drove for about 5 miles with no issues!
I let it sit for about 4 hours and went back out I drove it for about 4 hours round trip good heat and not over heating the temperature stayed around 190 to 198 I don't beat on the truck and I hope it's not a head gasket I'm going to put a new thermostat in tomorrow and do a block check with the dye while I'm at it! Has anybody run into this?
This morning I started the truck with the remote start let it warm up for 15 minutes and pulled away,it was around 23degrees this morning I had heat and the truck had good heat. I pulled in to the car wash to cancel the car wash for the winter so I figured I would get the truck washed.
When I left the car wash I got out to put my antenna back on and noticed it was starting to blow cold air,I looked at the temp guage and it dropped to 150 and then to 140 this was on the temp on the mini max!
So I drove to the express way and it still was blowing cold.
After I got up to 60 mph it got heat for a few minutes but it went away!
Then the temp guage went to 200 then down to 180 so I got off the express way and it went to 220 then to 235 but no heat! I drove over the railroad tracks and all of a sudden the temperature dropped to 180 and the heat came back I drove it home about 2 miles and checked the coolant!! It had pressure in the system but the coolant resiviour was over full it took about 2 quarts in to the radiator and I started it back up, no air bubbles or blowing the coolant out and it had good heat and not running hot!
I got on to the express way and drove for about 5 miles with no issues!
I let it sit for about 4 hours and went back out I drove it for about 4 hours round trip good heat and not over heating the temperature stayed around 190 to 198 I don't beat on the truck and I hope it's not a head gasket I'm going to put a new thermostat in tomorrow and do a block check with the dye while I'm at it! Has anybody run into this?
Yesterday I drove it around for about 40 miles and today I put over 57 miles on it! Got her good and hit the temp stayed around 192 to 198 so I put a new Cummings thermostat and also did a block check test and it passed,I put in the thermostat in and now it's running about 184 at idle and 188 to 194 on the highway plus it seems the heater is a lot hotter!
But I'll see what happens.
But I'll see what happens.
Well it's been almost a month and about 1500 miles since my issue with the cooling system issue! No overheating,no loss of heat,no loss of coolant!!! It's been fine.
I think once the weather gets warmer out I'll put a head gasket and studs in just to be on the safe side. Any suggestions on what gasket or studs to use?
I think once the weather gets warmer out I'll put a head gasket and studs in just to be on the safe side. Any suggestions on what gasket or studs to use?


