Dexcool disappearing from reserve!?! - Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum



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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > OEM Issues

OEM Issues Original Equipment Repairs and/or Problems

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  #1  
Old 05-19-2007, 10:09 PM
nvmatrix nvmatrix is offline
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Dexcool disappearing from reserve!?!

Just bought my 2007 TB and was checking things out and noticed Dexcool was low in the reserve tank. So I bought some 50/50 and top it off. Check it two days later and most of it is gone!!! What the hell is that!

There has to be a leak some where but its not getting to the ground. I'll have to take it in Mon. to have them look into it. Question I have is there any know issues with losing coolant?
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  #2  
Old 05-19-2007, 10:42 PM
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The one that gets the most attention is the water pump. Check around the shaft.
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Old 05-19-2007, 10:49 PM
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No bulletins on the 07...I'd suggest that you tell the dealer that you topped off the system 1X already, but don't top it off again before you bring it to the dealer...this way they will see that the reservoir is empty
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Old 05-20-2007, 06:59 AM
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Do a quick check on the passenger side floorboard to make sure your heater core is not at fault, or has a loose hose. Being an 07, you would hope not, but never know.

Chris
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Old 05-20-2007, 08:58 AM
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Not to worry you but it could be a small crack in the head leaking water to the combustion chamber.
Check your exaust for excessive water coming out.
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Old 05-20-2007, 11:09 AM
nvmatrix nvmatrix is offline
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Quote:
Originally Posted by bust_ter View Post
Not to worry you but it could be a small crack in the head leaking water to the combustion chamber.
Check your exaust for excessive water coming out.
I'll check it out.

I notice that I can smell it when I get out after driving. But like I said its not hitting the ground and I can't see any in the engine bay. At least its under warranty
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Old 05-20-2007, 11:41 AM
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wow a 07 with a bad head/gasket hope it get's fixed up for you not nice to have problems so soon.

can you see white smoke out the exhaust or does it have a sweet smell to it?
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Old 05-20-2007, 11:56 AM
nvmatrix nvmatrix is offline
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Originally Posted by The_Intimidator View Post
wow a 07 with a bad head/gasket hope it get's fixed up for you not nice to have problems so soon.

can you see white smoke out the exhaust or does it have a sweet smell to it?
Sweet smell from the engnie bay after I get out from driving.
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Old 05-20-2007, 12:07 PM
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hmm maybe you have a leak in one of the heater lines. It could be dripping onto the exhaust manifold and burning off before hitting the ground you need to get a pressure tester for the cooling system and look for leak's and to see if it will hold pressure. you could have a trusted local shop do this for you should only take them 15 minutes to determin the problem assuming it is a external leak one of the hoses rad water pump ect if it is internal you will be best to take it back to gm for diagnoses and repair

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Sweet smell from the engnie bay after I get out from driving.
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Old 05-20-2007, 02:54 PM
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smell

If the smell is from the front something like the water pump is a possibility.
It may be a small enoug leak that it burns it off and leaves little trace of leakage on the ground. Pump, Hose, thermostat housing, lots of things to look at.
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