A few months back I was 95% successful in doing a coolant flush. The 5% fail was a rookie error in over tightening the top bleed screw back into the radiator. It didn't take much but I stripped the thread. I thought I'd resolved it by putting a couple of small copper sealing washers onto the bleed screw and easing it tight.
No doubt due to the hotter weather, it's become obvious that the radiator is not sealed at the bleed screw. I've noticed a few splashes of white back along the RHS of the engine and on close inspection I can see that a small amount of coolant is leaking out of the bleed screw hole. It's not loosing enough coolant to be noticeable at the indicator marks on the expansion tank but I want to sort it out.
I'm not going to be taking it all off again and trying to re-tap the hole to accept a bigger screw, nor do I think helicoils are a good idea in the soft aluminium radiator.
A mate has suggested loctite'ing the screw into the hole. I understand that there are different colours and applications of loctite and even a tape version. I don't want to put it in so permanently that it rips out and cause further damage when I need to take it out for another flush.
Has anyone got any suggestions of a quick an easy fix or experience of a similar issue?
Thanks in advance