04 G35, Heat Problem
#33
It was definitely air in the system, most non VQ oriented mechanics do not know how to properly bleed our coolant system.
*Warning: If temp gauge begins to quickly climb immediately shut the car off, let it cool to ambient temp and check fluids.
**Perform at your own risk, It is highly recommended for a professional familiar with the platform to perform this task.
-Rob
- Elevate the front of the car (where radiator cap is highest point in the system), Top off radiator and coolant reservoir
- Start the car
- Turn the Heat on 90* and fans on high
- Let it idle until operating temp is reached
- Rev the car to ~3k rpm and hold for 10 secs
- Let the car idle for a couple seconds
- Repeat steps 5 and 6 4-5 times
- Turn off the car
- Place a fan in front of the car and allow it to cool completely down to ambient temp
- Check reservoir and Radiator level, add if necessary
- Repeat Steps 2-9 until you no longer have to add Coolant and your heat is Hot
*Warning: If temp gauge begins to quickly climb immediately shut the car off, let it cool to ambient temp and check fluids.
**Perform at your own risk, It is highly recommended for a professional familiar with the platform to perform this task.
-Rob
Our '04 FI G35 is a recent purchase but had a Mishimoto dual core radiator installed at some point so the cooling system has been opened. The heater has never worked for us. Recently I had the car up on jacks installing a BBK and when I drove it immediately after, the engine temp gauge was all over the place (mostly hot). All I could figure (since I didn't open the cooling system) was that an air pocket moved from the heater core to the head.
After reading your instructions above, I went through the process and found a huge air bubble in the cooling system. When I opened the bleed valve (with the radiator full), there was nothing but air in that hose going to the heater core. I ran through your process and after repeating steps 5-6 a few times, the G finally has heat...but only when the engine is above 2k rpm. If you sit at a light idling for 30 seconds....the air gets cold again. I apparently have more air to chase.
I just ordered a Lisle Spill Free funnel which will be here tomorrow. With that, I should be able to get the rest of the air out of the system. What a pain.
#35
Does it have to be a Lisle or can it be this one....http://www.oreillyauto.com/site/c/de...t=C0166...????
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