Antefreeze ,,leak''..pics included.

[Dejanh]

Pictures will explain it more easily but i have antifreeze leaking right out of some kind of a breather hose underneath my cab, passenger side right where all the AC lines go in....its leaking more in colder weather and it has been doing it for a while with no issues. Am not noticing that am loosing any coolant at all...its a DD60, 400K miles, 475hp.

What is this hose called and what is its purpose?

[Dejanh]

Thats the hose am talking about right next to the AC lines..

[Dejanh]

The aftermath.....

[Copperhead]

sure looks like coolant leak in the core and it is coming out the condesation tube.

[Dejanh]

sure looks like coolant leak in the core and it is coming out the condesation tube.

Its doing it while am parked BTW.

[LightsChromeHorsepower]

Do you have a heater core in there with the a/c condenser? It could be the core or a hose leaking when it's cold. I would check the hose clamps & core.

You need to wash your truck too.

[Dejanh]

Do you have a heater core in there with the a/c condenser? It could be the core or a hose leaking when it's cold. I would check the hose clamps & core.

Man i don't even know how to check for that, ill see about it though.....
Hey, thanx..

You need to wash your truck too.

No use..
Places where we load at are about foot deep in all kinds of *****, from limestone to gypsum and clay. If i wash it today, itll be back to looking crappy tomorow.

[Kranky]

Yes, the heater core is in there along with the A/C evaporator.

Those 2 rubber 90 deg. lines with the spring type clamps on them are the coolant lines to the heater core.

There is a leak in the heater core, or in the lines inside the HVAC unit and the leaked coolant is draining out the drain tube that is there to allow A/C condensation to drain out of the HVAC unit when using the A/C.

You'll have to pull the lid off the HVAC unit inside the cab and have a look.

.

[Dejanh]

Yes, the heater core is in there along with the A/C evaporator.

Those 2 rubber 90 deg. lines with the spring type clamps on them are the coolant lines to the heater core.

There is a leak in the heater core, or in the lines inside the HVAC unit and the leaked coolant is draining out the drain tube that is there to allow A/C condensation to drain out of the HVAC unit when using the A/C..

Thank you my friend...

You'll have to pull the lid off the HVAC unit inside the cab and have a look.

.

Is that the black box type thing underneath my bed, on a passenger side?

[Kranky]

Is that the black box type thing underneath my bed, on a passenger side?

I always work on day cab Internationals, and on those the HVAC unit is under the passenger seat, however, by looking at your pics, I would say yes, the HVAC unit is in your sleeper on the passenger side, directly above where those hoses go thru the floor.

.

[magna19]

is it bright green? or red? bright green is the color of the dye they use in the a/c systems on a freightliner. see if your a/c still works.the other way is follow the lines to the motor and see if they have shutoffs to the bunk lines,if so shut them off.keep an eye on the coolant level.also if you can pressure the cooling system up and pull the covers off the bunk unit and check around inside it for a leak. they are easily accessible to change. did a few of them.

[LBF]

You still have warrenty on that thing? That's the first step, otherwise...

Pull the cover off and have a look to see if you can get the heater core out.

The core's metal lines are attached to those rubber lines in your picture, so if there's no leaks from those pipes, you have a leaking core. Rectangular finned box, two metal pipes out through the floor.

Not a huge deal, if you can carefully remove it, go REALLY easy on the AC lines, bend or kink those and you're into it $$$. Don't mix up the AC evaporator and the heater core, they both are finned box affairs.

If it looks like you can get that core out, trace those two heater lines back toward the front, should be some more rubber where it tee's off to the front heater core. Use two pairs of vice grips to squeeze the pipes towards the front so you can take the rubber pipes off in the picture without losing too much antifreeze. Take the removed core to the dealer and get a replacement.

Let us know how you make out!