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coolant leak...

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Old 05-10-2012, 12:06 AM
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That's just condensation coming out of the tailpipes. Completely normal.
Old 05-10-2012, 09:25 AM
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im fairly certain it isnt the water pump gaskets, i dont see signs of leakage there. i havent checked the weep hole in a while , gonna do that.
Old 05-10-2012, 09:26 AM
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doesnt seem like a lot of condensation to you?
Old 05-10-2012, 09:31 AM
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some of that fix all is really expensive, like over a hundred bucks. i dont know if i want to spend that. even though its "guaranteed" to work. but i really see no other choice, since i havent been able to pinpoint the leak.
Old 05-10-2012, 09:31 AM
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Originally Posted by cammed00
My 00 Sierra w/4.8 did the same thing and the light always seemed to come on in the same exact spot on the way home and it ended up being the weep hole on the water pump. Not sure if it's any help but a suggestion I guess.
I had that too. Water pump was a lifer from ho-Reilly's, and just swapped it. Problem solved.
Old 05-10-2012, 01:51 PM
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Originally Posted by slow.8
doesnt seem like a lot of condensation to you?
Nope. That's why stock mufflers have weep holes in them. Lets the condensation that collects, drip out the bottom. Your mufflers are holding the moisture inside, collecting in the bottom of the mufflers. Then you start the engine, or rev it up, and some (not all) of that water gets pushed out with the exhaust gasses.
Old 05-10-2012, 03:21 PM
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my 2004 was doing kinda the same thing, if you looked at the front of the pump or even from the top of it,I could not see any water leaks,pulled it off and the whole back of it was wet and leaking.
Old 05-10-2012, 05:46 PM
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1) Have a pressure check performed.
2) Put the dye in the coolant and check for external leaks that way

You said the heads were off at some time. How long ago was that? Did you get the system full of coolant afterwards? Properly burped all the air out?

If your coolant keeps going low and no external leaks can be identified, then it is going into the crankcase - somewhere, somehow.

My leak was ongoing for seven months. No external leaks. No milkshake on the dipstick. No milkshake even when I changed the oil (after 3 months of first sign of leak). Oil still look good. It wasn't until it started leaking at a greater rate that another sign showed up - the oil level light came on. Why? because the coolant gelled up the oil and weighed down the sensor. Still, the oil was black, everywhere except for the driver side rocker area: milkshake.
Old 05-10-2012, 06:00 PM
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Have you pressure tested your cooling system?

If not, that's the first place I'd start. Pump it up to 14-15 psi and see if it loses pressure.
Old 05-11-2012, 10:28 PM
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ill look into getting it pressure tested, thanks. ill try the dye also... appreciate it
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