So while installing the tensioner mentioned, I managed to poke a hole in my radiator!
Quick on my reaction I had a pick tool right near me I poked it into the tiny tiny hole and made it big enough to accept a tiny stainless screw that held in the coolant with no pressure.
Then cleaned the area and sanded the aluminium with a scotch bright pad then with some brake kleen.
It was 34° out (f) so the bk want r evaporating fast so I lit the residue on fire to consume it and also warm the patch area.
JB Kwik to the rescue.
The cold was greatly slowing the cure time but after about an hour I drove maybe 40 minutes and it held.
It's been holding a couple weeks and 12-15 hours of driving it seems to be permanent!
$380 for a new radiator or $0 since I already had the JB Kwik on hand.
I did a similar repair on an SUV with a rear evaporator; the high and low pressure lines are about ten feet long and wound through the underside of the car would be an entire day job to replace not to mention the price!
Anyhow it of course was the high pressure side with the hole but JB weld is spec at 4000+ psi and I needed to hold back 260. Worked and had lasted 5-6 years so far.