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I have a 2007 v6 with just under a 100k on it, and i'm eating through coolant. There's no leaks, no dripping, and I even had it pressure tested. Here's the scary part, if i get on it and run it hard up to about 5k rpm, i can smell coolant with my windows down. Do you guys have any similar problems or suggestions for me?
 

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Sounds like (based on your info) you lost a head gasket.
There is a hydrocarbon test you can do, you can also remove the radiator cap (engine cold), then start it and see if you see bubbles out the filler neck.

You may be able to smell a sweet smell out the exhaust pipe.
 

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check your carpet on the passenger side and see if its wet. close your windows and use the defroster, see if the front windshield fogs up immediately and you smell coolant. either case, you have a leak in your heater core. not a fun job to replace.
 

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I'm with Charlie on this one. If you have the means and the time, do a leak down test. That well tell you straight away if you've got a compression issue and likely where it is.
 
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