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Unread 08-16-2009, 05:18 PM   #1
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2009 WK 
Join Date: Nov 2008
Location: Manhattan, New York
Posts: 320
finding the source of a coolant leak

For the last few months I've been slowly loosing coolant out of the reservoir bottle and haven't been able to pinpoint the leak. I've eliminated the head gasket as a problem. I recently noticed a small stain that would appear under my WJ after a drive.

Got down and it smells like antifreeze... I'm guessing water pump but can't really see where it drips from. I don't think it's the radiator either, the drip is behind where the radiator is located. Anyone have any ideas?

2001 WJ Laredo 4.0L - Sold!
2009 WK Limited 5.7L HEMI
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Unread 08-16-2009, 07:05 PM   #2
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2011 JK Wrangler 
Join Date: Aug 2004
Location: Southeast Michigan
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Check real good around the thermostat housing. I had a small leak there that would drain my overflow bottle in about a month.
Previous Jeeps: 84 CJ7 (A True Jeep), 2000 XJ (163,000 Miles/Totaled (Pictures of wrecked Jeep in gallery)), 2004 WJ (parting out die to major electrical issues)

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Unread 08-16-2009, 08:38 PM   #3
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2002 WJ 
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Borrow or rent a pressure tester and you should be able to find the leak pretty easy. Under pressure the leak will usually start to push enough fluid out you will see and or hear it.
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Unread 08-16-2009, 09:17 PM   #4
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1995 ZJ 
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check the water pump, hoses, and thermostat. try and follow the fluid up and see where it is leaking from
95 ZJ, 5.2 V8,160,000 miles
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