| Author | Message | ||
     Wei Quek (Apohis) New Member Username: Apohis Post Number: 5 Registered: 04-2003 |
I replaced the thermostat and rad over the weekend and topped the system up with slightly under 2 gallons of coolant. Ran the truck with the overflow cap and rad plug off for about 20 minutes until after the thermostat opened and the car came to running temp. The heater was on the whole time but no heat came out. I checked the water lines attached to the heater valve and one was hot and the other was cold (see picture).  Does this indicate the presence of air in the heater core or is the water valve bad? How does the water valve work? TIA | ||
| Lee R. Byrd (Mobile) New Member Username: Mobile Post Number: 28 Registered: 07-2003 |
I know not of "water valves." I do have a suggestion that works with some simpler(older Jeeps) rigs. When you refilled your coolant, was the rig parked at an angle? If not, you might want to park the rig with the front end (radiator) elevated. If there is an air bubble trapped in the heater core it may be more easilly displaced if it has an upward trajectory. Air is lighter than coolant. It should try and escape toward the point of least resistance, the elevated front end. I can't guarantee any results but it worked on my Jeeps. (The jeeps also did not have a "water valves.") Good Luck | ||
| john heath (Jheath6) New Member Username: Jheath6 Post Number: 33 Registered: 09-2003 |
sounds like an air pocket to me get rid of the air before you blow antifreeze all over the highway when the bubble does work loose | ||
| Kristopher March (Apexdisco) Member Username: Apexdisco Post Number: 158 Registered: 02-2002 |
how would you get rid of air pockets? I'm attempting to flush and fill my radiator tomorrow night. Thanks! | ||
| john heath (Jheath6) New Member Username: Jheath6 Post Number: 40 Registered: 09-2003 |
sometimes 20 min. isn't enough . did you see the level in the radiator drop when the thermo opened it should drop a lot and bubbles should rise to the top and then u have to add more at this point | ||
| Sergei Rodionov (Uzbad) Member Username: Uzbad Post Number: 81 Registered: 08-2003 |
Kristopher - if you fill coolant slowly - should be ok by itself. If you suspect pocket - you can try to rock truck for a bit, with opened caps. Or you can drive on bumpy road  | ||
| Wei Quek (Apohis) New Member Username: Apohis Post Number: 10 Registered: 04-2003 |
Driving around a bit also helps. I found the coolant level dropped quite a bit after driving around for a day or too. Don't forget to top it up and check for leaks. If you haven't already done this, maybe now is a good time to replace some hoses and the thermostat. |
