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Unread 06-13-2013, 03:26 PM   #1
yjgirl88
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Coolant leak

Hi everyone,

I have a '94 YJ and I am having an issue with coolant leaking. Bought it a few days ago knowing there was a leak. Brand new water pump, installed by previous owner who didn't remove the old WP gasket, so we pulled that out and put a new one in. New thermostat as well. Now, the engine is staying cool but we are still seeing a small leak. Can't get in to see exactly what the issue is yet, but any suggestions on where to look? Anything that is a common issue?

Thanks!!

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Unread 06-13-2013, 03:41 PM   #2
Rproject
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1987 YJ Wrangler 
 
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You're going to have to trace out the leak trail. It could be from your hoses, maybe a clamp isn't tight enough? Are you sure the gaskets are properly seated for the thermostat and water pump?
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Unread 06-13-2013, 03:42 PM   #3
idaholtby
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Could you please be more descriptive as to the location of the leak. Most non-descript answers go for the water pump, but obviously you have addressed this. Drops seen underneath is from what locale? Front of engine, left/right, near firewall, etc...
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Unread 06-13-2013, 04:12 PM   #4
yjgirl88
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Front of engine, area of where the WP gasket is.
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Unread 06-13-2013, 04:29 PM   #5
idaholtby
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Quote:
Originally Posted by yjgirl88 View Post
Front of engine, area of where the WP gasket is.
The only answer I could provide then is to crawl under the beast after it has been warmed up and then shut off. Coolant pressure is at it's greatest at this point of time and provides the best chance of catching it in action. If the water pump is not the source, as it has been replaced with new, then look at all hose connection points and then the radiator itself, as it can spray in any direction from a breach.
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Unread 06-13-2013, 06:02 PM   #6
yjgirl88
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A farther out view for area comparison

image-3818148154.jpg


Closer up
image-2654960350.jpg
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Unread 06-13-2013, 06:04 PM   #7
yjgirl88
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Those pics are taken from the drivers side.
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Unread 06-13-2013, 06:07 PM   #8
idaholtby
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1991 YJ Wrangler 
 
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Quote:
Originally Posted by yjgirl88 View Post
Those pics are taken from the drivers side.
Well with these pictures, your issue is either a cracked thermostat housing or insufficient thread sealant on the heater tube that is threaded into the t-stat housing.
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coolant , Coolant leak , water pump

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