I've used Bars Leaks several times. The only time it failed me was on my Mini but the radiator was curse word and every time it plugged a hole a new one appeared.
My uncle (a grease monkey for nearly 40 years) puts Bars Leaks in cooling systems as a matter of course. He reckons he's never known it block a heater matrix and, if a stone holes your rad on the motorway, you won't even know about it.
My uncle (a grease monkey for nearly 40 years) puts Bars Leaks in cooling systems as a matter of course. He reckons he's never known it block a heater matrix and, if a stone holes your rad on the motorway, you won't even know about it.