I have a radiator that has started leaking oil, by its bolt.
I assume that cause can be that metal is a bit rusty around the bolt, as it is easy to remove the paint when scratching and a bit of rust is below.
Facts: from the factory it had a transparent silicon but it is not stopping the leak anymore. The bolt seem very tight
Should i remove the silicon, remove rust and apply a sealant? Untight the bolt, remove rust, apply a sealant and tight the bolt again?