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05 suburban coolant leaking



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Old 10-19-2010, 12:30 PM   #1
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05 suburban coolant leaking

I can smell it outside the vehicle. I can't find a leak anywhere! It slowly goes down in the reservoir. I have now clue. I think it's the waterpump, but I can't find any evidence from the weep whole. It it comes from the intake gasket then I wouldn't be able to smell it, right?
Any mechanics that can help out on here?
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Old 10-19-2010, 12:55 PM   #2
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I had a problem like that on my 97. Besides the water pump..... the quick disconnect off the intake (heater hose) on the passenger side was leaking. I could not see it at first with the large hose off the intake. Mine was pitted badly. I replaced it with a metal one that autozone sells. The OEM one seems to be made out of putter or some cheap metal. I broke it off trying to remove it. Ended up having to chip at the threads with a dental pick to clean it up and install the new one.
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Old 10-19-2010, 03:10 PM   #3
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I'll look, thanks!
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Old 10-20-2010, 07:42 AM   #4
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Like Mike said, those stupid heater hose fittings suck. Had the same thing on a 4.3, but luckily mine actually screwed out instead of breaking off. They get a dissimilar metal kind of corrosion, as well as being brittle. A little teflon on the new barbed fitting, and you're gtg forever. I'd replace both of them while you're at it.
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Old 10-21-2010, 10:41 AM   #5
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05 Sub is going to have a 5.3 ls style motor and will not have the heater hose fittings you speak of and no coolant runs threw the intake on that motor.
Check your heater core for leaks.

And one last thing not sure on the year but there was a problem with some gm heads will crack around the head bolts under the valve cover and slowly leak coolant into the crankcase.
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Old 10-21-2010, 10:47 AM   #6
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Put some UV crap in it. It's the water pump. Very slow drip and slings it on the motor where it evaps really quick.
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Old 10-22-2010, 07:59 AM   #7
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Good deal.
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