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Old 12-12-2009, 03:45 PM   #1
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Angry Weird smell questions???


If anyone can help...
I have a 99 Jeep Wrangler TJ Sport. I have had a recent bout with overheating. So far I have: replaced the radiator, thermostat, radiator hoses, and transmission coolant hose. I have had the engine and heater core flushed. My Jeep has seemed to quit overheating, but I am smelling a coolant smell once the engine heats up or when I turn it off and it's cooling down. I thought it may just be coolant burning off the engine from where it boiled over, but I have washed the engine and removed all excess coolant and am still getting the same smell. Can anyone give me a hint of what else this could be???

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Old 12-12-2009, 03:59 PM   #2
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Has it been leaking at all? Where is the smell, in the cabin or engine bay? The seal to the overflow reservoir may not be perfect and vapors/smells are leaking from that

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Old 12-12-2009, 04:04 PM   #3
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The smell is from the engine bay area. Would you be seeing any visual leaking?
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Old 12-12-2009, 04:26 PM   #4
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When hot, the vapors would produce no visible leaks. Your best bet would be to pressure test your cooling system while cold and hot to ensure there aren't any leaks. Something like this: Amazon.com: Stant Inc. 12270 Cooling System and Pressure Cap Tester Set: Automotive maybe autozone has something cheaper or something to rent.

Also, once the engine is cold you can feel around and see if there are any leaks, but as I said before the leak may only be occurring while the system is hot. You could even throw on some gloves and feel around while it is hot. Personally I think the pressure test is your best bet. Either way, start with your overflow reservoir cap, check for visible leaks and move onto pressure testing from there.
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