Small coolant leak

[Mundy]

Occasionally I get a whiff of coolant inside the cabin. There are no leaks that can be seen in the engine bay and a recent pressure test didn't reveal a problem. I don't have any wet carpet or any coolant leak under the car (that I can tell given the normal condensation pool). I understand that there's no hot water valve in the heater system so its not from that. I can't understand why I only smell it every now and again. I am wondering where I should look - does anyone have any suggestions?

Mundy

[AussieAub]

Definitely coolant and not window washer fluid?
I can usually smell washer fluid inside the cabin when I use the windscreen jets.

Just a thought.....

[Judo]

If it's definitely coolant, it almost has to be the heater core doesn't it?

[It'sNotWorthComplaining!]

I had hot coolant smell coming into the cabin, it was a leaking hed rear welsh plug, the oat was seeping out of it. V8 Disco2.

[Marmoset]

I'd suggest heater matrix or o rings to the heater matrix hoses. I've had plenty of coolant leaks that I can smell as soon as I'm out of the car but none have been evident when I'm inside it.

Rich

[Mundy]

Thanks for the responses, guys. There's no coolant smell outside the cabin, only in and only occasionally. I'm sure its not window washer fluid. I'm half way into installing a T2 combo engine saver and will see if there's a correlation between temperature (and hence pressure) and the scent. If so, its in the heater system somewhere and presumably a very small weep that only occurs when the pressure is highest.

I could pull the console and heater system apart but I wanted to avoid being like the guy on the SuperCheap ad trying to find the rattle.

[biggin]

Check that your A/C bleeds aren't blocked.
When mine were, it smelt a bit like coolant.