Well, radweld plus did not stop my 206 gti's water loss. One more thing to try - Wonderweld. It can repair some engine block / head gasket problems. T he car is 14 years old and if it needed a head gasket it would probably be scrapped. The instructions are here:
It says run the engine for up to 2 hours until water loss stops, topping up as required. The problem is, you just cannot see the water level in the op aque 206 expansion bottle, and also, how can to top up the engine safely wh en it is hot? In 2 hours I reckon I'd get though an expansion bottle conten ts, so I'd probably run it for an hour and then cool down and top up and tr y half hour runs to see if it is still losing water.
Failing, this, how hard is a DIY head gasket change ? I think a garage woul d charge at least 500 quid. And I've heard horrors about needing to skim th e blocks and replace the studs etc.
If I don't sort the leak I'll not be able to keep enough antifreeze concent ration to drive it this winter.
Simon.