Radiator Drain

[dyogi]

Sorry if this is a stupid question but is there a petcock drain on the radiator of an '07 C6? I wanted to drain out a bit to add some water wetter but couldn't locate a petcock. If not what is the preferred method of draining out a bit of coolant?

Thanks in advance,

Dennis

 

[NORTY]

Can you just add it to the overflow resivior?(sp) It would enter your system as it cools in contracts with many heat cycles.

 

[dyogi]

Can you just add it to the overflow resivior?(sp) It would enter your system as it cools in contracts with many heat cycles.

I don't think that coolant in the overflow reservoir will circulate unless there is a demand for more coolant into the system. If the C6 is like other cars, coolant must be removed before you can add additive to the reservoir and it pulled into the system. Can anyone shed light on this? Thanks.

Dennis

 

[Tuna]

Sorry if this is a stupid question but is there a petcock drain on the radiator of an '07 C6? I wanted to drain out a bit to add some water wetter but couldn't locate a petcock. If not what is the preferred method of draining out a bit of coolant?

Thanks in advance,

Dennis

I use a turkey baster and just suck some of the coolant out of the reservoir and save it. Add the water wetter and top off with the coolant you removed. Make sure you don't put the turkey baster back in the kitchen afterward.

 

[dyogi]

I use a turkey baster and just suck some of the coolant out of the reservoir and save it. Add the water wetter and top off with the coolant you removed. Make sure you don't put the turkey baster back in the kitchen afterward.

So you're saying that the coolant from the reservoir tank circulates constantly and not only when the system demands replacement coolant? If that is not the case, wouldn't the water wetter additive would just sit in the reservoir tank unless the system demands it?

Thanks for the input

 

[Tuna]

So you're saying that the coolant from the reservoir tank circulates constantly and not only when the system demands replacement coolant? If that is not the case, wouldn't the water wetter additive would just sit in the reservoir tank unless the system demands it?

Thanks for the input

It appears to me that the tank that the 'radiator cap' sits on is part of the overall cooling system and not just a 'reserve' tank. I don't see any other port for servicing the cooling system.

Either way, coolant is pushed into the tank and pulled back into the system each engine run cycle, so the water wetter will get into the total system in short order. At least that is how I understand.

 

[dyogi]

It appears to me that the tank that the 'radiator cap' sits on is part of the overall cooling system and not just a 'reserve' tank. I don't see any other port for servicing the cooling system.

Either way, coolant is pushed into the tank and pulled back into the system each engine run cycle, so the water wetter will get into the total system in short order. At least that is how I understand.

It seems that the coolant in the reservoir just sits or cycles at a really slow rate. I replaced the coolant in the reservoir with the water wetter and it doesn't appear to have cycled (at least much). I guess its back to draining some coolant. I still can't locate a petcock on the radiator, I guess that I'll have to crack a hose connection.