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Old 07-10-2011, 12:17 PM   #1
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Need Help! Water Leak

Trying to help a buddy out he has a 95 YJ 4 banger. Whenevrer he stops and shuts the engine off he loses all of his water/coolant. He can fill it up and drive just fine. He has done trips of 35- 40 min with no overheating. But every time he shuts it off he loses "all" of the water in the system. I have not had a chance to go look at it so I do not know if it is actually all of it or just a significant portion. He says that it pours out from the engine side not the radiator side.

Any ideas of where the problem could be?

He says that the radiator is not leaking nor the upper or lower hoses. He says it looks like it is coming from the water pump area.

Would a failing water pump leak more with the engine off? This is just strange to me since I would figure that while running there would be more pressure causing it to leak out faster but in this case it is the opposite.

Any ideas would be great.

Thanks Ken
If you want to call to get more info I would be happy to talk
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Old 07-10-2011, 12:20 PM   #2
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Yes it definitely would. Replace the water pump!

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Old 07-10-2011, 03:31 PM   #3
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The water pump has a tiny seepage hole that will allow water/fluid to drain out. If it has been leaking for a while you should be able to see the water trail coming from that tiny hole. I think when the pump bearings get shot then the hole leaks and that signals the owner to replace the pump. Pumps are cheap and easy to replace, takes about an hour or so. Just get the pump and a tube of gasket material, and some fresh water/or coolant, and get er done. ( make sure before you put the new one on the vanes are pointing in the right direction, I know a few pumps have an " R " stamped into them and that means the vanes are reversed )
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