Sweet Coolant Smell but No Coolant Leak? - JeepForum.com
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post #1 of 5 Old 11-06-2010, 10:22 PM Thread Starter
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1999 TJ Wrangler 
Join Date: May 2010
Location: Florida
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Sweet Coolant Smell but No Coolant Leak?

So as some know, I have basically had a major once over on my 2.5L. The newly replaced head, new thermostat, new hoses, new temp sensor, new radiator & cap & the new water pump replaced 11 mnths ago.
The majority of the wrok has been done over the last couple months. I notice a sweet coolant smell when i get out of my Jeep. The overflow coolant container isnt loosing coolant and I cant see any leaks anywhere. I thought it may have been just coming from the coolant bottle due the the yellow flip lid that doesnt really seal tight when snapped on. I took a balloon and stretched over the fill and snapped the yellow did over that.....fit tight then. I then took some very dense spunge foam and put a piece in the overflow channel to maybe help keep smell contained. I still smell the coolant. Any ideas ......
Also they did a pressure test on the motor when they found the cracked head which was replaced. I dont smell it coming from the exhaust either. Definitely coming from under hood area / not inside the jeep.

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post #2 of 5 Old 11-07-2010, 12:01 PM
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1999 TJ Wrangler 
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Location: Yucca Valley, CA
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It always seems to take a long time for the smell to leave after any anti freeze spill. With the top off, I can sometimes smell just a whiff when the thermostat first opens. Maybe from the pressure forcing the vapor thru the coolant recovery bottle? As long as there are no leaks, it will go away in time.

Expediency is no excuse for substandard work!
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post #3 of 5 Old 11-07-2010, 02:12 PM
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I blew the plastic cap off my radiator. After replacing the entire cooling system it took several weeks for the smell to go away.
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post #4 of 5 Old 11-07-2010, 02:35 PM
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Give it time to either burn off or to show its head. Keep watching for stains on and around radiator, not drips but stains & smears.
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post #5 of 5 Old 11-07-2010, 10:56 PM Thread Starter
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Thanks for the advice. I did use engine bright degreaser to wash the engine bay down , hoping that would do it but no. Ill keep an eye on it.
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