If its only a small weep have you tried Steel Seal in it? Wonderful stuff but £25 a throw..
Thanks Taffmog, I've used it in the past on short term end of life motors, and have some equivalent in the store. I've read it can lead to later problems like stuck (welded) plugs and build up on valves in certain cases- although this shouldn't be the case with my engine as the head gasket isn't blown, but I'd be more than a bit worried about furring up passageways in the longterm. I got my bottle previously for a suspected HG on the budget Saab, but didn't need it in the end. It is quite expensive for what it is as you say, so if you ever need it for short term quick fix on a cheap motor, this stuff is equivalent :
https://www.ebay.co.uk/itm/Water-Gl...726670858?_trksid=p2349624.m46890.l49286
