In-car fumes

[Ado Sigal]

That's correct, and same test should be done on semi warm car. Anyway, 
the only definite signs of coolant loss in the cabin is underlay and 
carpet wetness, window steaming and specific smell, and proper way to 
establish the coolant leak is to pressurize the system to slightly more 
than nominal pressure, and observe on the gauge if there is a pressure 
loss over time.
BTW, if not form heater matrix, the fumes in the car can be getting 
through misplaced or missing firewall - bonnet seal.

Ado


Huw Powell wrote:

>Louis-Alain Richard wrote:
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>>If it is the heater core, then, a few hours after the car is stopped, the
>>pressure in the overflow tank should be nil. You can put your hand on the
>>top rad hose (engine cooled) and feel if it is still pressurized, and then
>>open the reservoir cap to hear if there is still pressure in there.
>>    
>>
>
>Wouldn't there be no pressure in the cooling system once it is cold 
>anyway? IE, even if there are no leaks? 
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