IMHO you were too quick to dump the rad flush. I was recommended by an expert to keep the Wynn's professional flush in for 100 miles when I had the red light problem with OK temp guage reading. In actual fact kept it in for 2 days and cycled from cold to hot about 6 times before dumping. (red light was cured after 2 cycles and I suspect head silt was problem).ed4ferrets wrote:ed4ferrets wrote:Okay, I have a car which is more than twice the age of some of you young whippersnappers out there It has an original steel vertical core type radiator which I can therefore visually see the clumps of rust etc from above.
I have used a bottle of proprietary type rad flush (10minutes) which did loosen and flush out some gunge but I can still see loads. Would running it on a vinegar mix help with a rusty steel rad without damage ?
Surely there are at least 3 wise men who can advise
So long as the rust hasn't eaten substancially through the metal anywhere then a proprietary flush in this way followed by a water flush and backflush should be all that you need.
Vinegar in a BX engine with wet liners may not improve its longevity.