My Thanks To GM

[Vics Stuff]

For those of with small leaks , I would recomend liquid sodium slilcate. (AKA Water Glass ) That is what is in all new cars antifreez. This helps to seal small leaks and have seen it used in older vehicle applications with success.
Vic

Originally Posted by Ian NZ

Karl, - I now have a one litre plastic bottle with a plastic hose connection which when I remove the radiator cap I slip the hose over the overflow pipe squeeze the bottle until water comes out the overflow pipe. I do this now and again just to check that the valve is clear.