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Coolant leak, cant find it

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Old 05-24-2008, 05:55 PM
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Default Coolant leak, cant find it

Its someplace on the passengers side, front of the engine. The car has a meziere electric water pump, 2 years old. Gaskets are new this year.

The pump and fittings look and feel dry as a bone, but underneath, the whole area below the pulley is wet, AC lnes wet, etc.

If I run the car, get under and look, I cant see a leak. The car might need a load on it to leak, I'm not sure. Any ideas?
Old 05-24-2008, 06:06 PM
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Thermostat housing?
Old 05-24-2008, 06:15 PM
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try to pressure test the system
Old 05-24-2008, 06:27 PM
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think it mite be a bad water pump.
Old 05-24-2008, 06:40 PM
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The thermostat housing looks dry, and it better not be a bad pump, though if it is, I still cant see where its leaking.

Pressure test? how do I do that?
Old 05-24-2008, 06:53 PM
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mine did the same thing it turned out that there is a hose that is on the passanger side towards the back by like the firewall, the clamp just slid down. take a look to see if thats it.
Old 05-24-2008, 08:41 PM
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Go to a parts house and get a small bottle of coolant dye, only a couple of bucks. Let the coolant and dye circulate a little while...go on a nice drive. Get a UV light and track down the leak. This method has not failed me yet. Just make sure to clean up the area before you put in the dye so you get a better visual.
Old 05-25-2008, 07:12 AM
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Some good tips, thanks. I'll follow up with most of them soon, but in the meantime:

Once I backed the car out, and kept it running, the drips started hitting the driveway. I got under there with a light and looked around cloesly.

Its getting wet just under the EWP, in 2 places, under the drivers side and pass side. The drivers side seems less, or the coolant is simply running down in a long path or something.

If I didnt know any better, I'd think it was the water pump gaskets leaking.
But they are new, and the new style. Only been on the car a year. Also why would both side start leaking at the same time???
Old 05-25-2008, 10:19 AM
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Originally Posted by Michael02hawk
Some good tips, thanks. I'll follow up with most of them soon, but in the meantime:

Once I backed the car out, and kept it running, the drips started hitting the driveway. I got under there with a light and looked around cloesly.

Its getting wet just under the EWP, in 2 places, under the drivers side and pass side. The drivers side seems less, or the coolant is simply running down in a long path or something.

If I didnt know any better, I'd think it was the water pump gaskets leaking.
But they are new, and the new style. Only been on the car a year. Also why would both side start leaking at the same time???

maybe the gaskets arnt set right. or the water pump bolts wernt torqed enough.
Old 05-25-2008, 01:29 PM
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Originally Posted by stangkiller2005
maybe the gaskets arnt set right. or the water pump bolts wernt torqed enough.
Well damn....In checking the bolts, I re-torqued them down to 24 ft/pounds, 2 more than the recomendation. I felt the loc-tite break free when I started to re-torque, so they didnt come lose. Anyway, the drivers side, bottom bolt (the tough one to get to) tho it was loc-tited, wasnt at its original spec of 22#'s. So its very tight now, along with the rest.

So far, it seems to be tight, no leaks. I've let the car run for 15 mins, backed out of the garage and back in, a few times, no leaks.

go figure. and thanks.




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