Hi guys,

With regards to sniff tester kits, should the tester be used on the header tank or the radiator?

Thanks a lot.

 

What car we talking about here?
Anywhere there's something to sniff I would have thought. I Think your rad (if its got a cap) should be full to the brim so not a lot of 'air' to sniff. Then again I don't think the header tank will have much air space either but probably a better bet.

 

Done mine on the header tank (impreza)

 

We're talking about an Impreza STi Widetrack. I've heard of people using both radiator and the expansion tank, I assume they'd both conclude the same.

You're right, both radiator and header tank are full to the brim - I think removing enough to draw air without coolant will be required.