2003 Saturn Vue Hybrid



August, 18, 2009 AT 2:15 PM

Heater problem
2003 Saturn Vue Hybrid 6 cyl Four Wheel Drive Automatic 111400 miles

recent engine swap used engine, new thermostat new heater core, flushed engine and radiator, dealer done, dash switch seems ok now no heat one hose hot other seems cooler


No Heat


2 Answers



August, 18, 2009 AT 6:34 PM

Hello -

Thanks for the info. If you are talking about your heater hoses going into the firewall. One hot and the other not then most likely there is air in the heater core not allowing coolant flow. The system must be bleed of all the air.

This is very difficult sometimes but must be done.

I have provided info on how to fill a empty system.

Filling Procedure
NOTE: All entrapped air must be purged from the powertrain cooling system before the final coolant level can be determined. Proper coolant level is critical to avoid engine damage.
IMPORTANT: The vehicle must be level when filling the cooling system.
1. Slowly add a mixture of 50/50 DEX-COOL antifreeze and clean water to the coolant surge tank until the level reaches the top of the Cold Fill Range surge tank seam. Refer to Capacities - Approximate Fluid in General Information.
2. Start the engine and check for leaks.
3. Run the engine and cycle the vehicle from idle to 3,000 RPM in 30 second intervals until the engine cooling fan comes ON, the engine cooling fan turns ON at approximately 102 C (216 F).
4. Return the engine to idle, idle for 30 seconds then turn the engine OFF.
5. Add coolant to the surge tank until the level reaches the surge tank vent port.
IMPORTANT: The level in the surge tank will return into the cold fill range once the vehicle cools.
6. Install the coolant surge tank cap.



August, 19, 2009 AT 12:35 AM

Hello -

Understand on the no overheat

The symptoms you have, one hose hot one not and no heat usually indicate no coolant moving through the heater core

Both hoses should be the same temp

Looking forward to hearing back from you after the refill. Please let me know so if that isn't it. We can get you some more trouble shooting

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