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Old 01-10-2013, 06:06 PM
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Loosing coolant but no leaking, puking or smoke

As the title says...

I'm loosing coolant somewhere. About 2 quarts every couple weeks.

For starters I had studs done a few months ago w oem gaskets.


I did have a leak that I could not find...weirdly it leaked near the firewall on the passenger side but ONLY WHEN RUNNING A TUNE.

That leak has stopped.

I do not have any puking at all nor any white smoke/steam when cranking cold or any other time.

I smell coolant after its reached operating temp.

As I said I am studded and deleted.

Any idea where the coolant could be going?

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Old 01-11-2013, 07:39 AM
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Bump

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Old 01-11-2013, 08:06 AM
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What is the vehicle? Could be a heater hose that has a small leak in it. If its an Excursion could be heater hoses going to rear heater. With leaking at pass anger side firewall I'd suspect a heater hose.
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Old 01-11-2013, 08:23 AM
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Quote:
Originally Posted by RedneckYankee View Post
What is the vehicle? Could be a heater hose that has a small leak in it. If its an Excursion could be heater hoses going to rear heater. With leaking at pass anger side firewall I'd suspect a heater hose.
Sorry. 2006 crew cab 250

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Old 01-11-2013, 08:38 AM
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If you only smell coolant at operating temp. Look at heater core may have a small crack that has gotten sealed enough not to leak and once thermostat opens its allowing small amount of coolant out. I'd pull thermostat and pressurize system while every thing is cool incase something decides to let loose you won't have hot coolant to deal with.
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Old 01-11-2013, 12:21 PM
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Quote:
Originally Posted by RedneckYankee View Post
If you only smell coolant at operating temp. Look at heater core may have a small crack that has gotten sealed enough not to leak and once thermostat opens its allowing small amount of coolant out. I'd pull thermostat and pressurize system while every thing is cool incase something decides to let loose you won't have hot coolant to deal with.
I don't smell it in the cab. Just around the front clip

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Old 01-11-2013, 12:57 PM
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you may have a small hoseclamp leak, crack in radiator or gasket or a small pin hole in a radiator tube.
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Old 01-11-2013, 07:46 PM
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I had the same thing and finally found that at the top of the radiator where the seam is it had a small crack but didn't leak until I over filled the bottle to much, just a tip
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Old 02-05-2013, 04:20 PM
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I've subscribed to this thread as i have mysterious coolant loss as well. My thread is named.....Using Coolant

The ideas here are quite good....i'll be checking them out over the next couple of days....but i'm loosing gallons at a time.....over a few days with no sign of where it's going.
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Old 02-18-2013, 09:59 PM
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Had the same issue but no visible leaks.


Found it today while checking injector cups that the degas bottle had a small pinhole in it and was only leaking when it reached that level. I found white crust all over the frame, wires and hoses under the degas bottle.

Last edited by Sno-Mow; 02-18-2013 at 10:07 PM.
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