Where do I get one from?

I currently have normal ones on the rad and on the expansion tank and want to blank one off.

Thanks

I'm sure QH do one if you ask at your local motor factors.

lococ solution would be to first remove the rubber seal and solder up the spring plungerey bit; then glue the seal back in?

Hi,I just used a higher pressure one for the rad from halfords,theory being the header bottle will open first .
Seems to work fine.

Q.H. used to do one for the old Austin/Morris 1100/1300 . Don't know if they are still available but if you can find a listing for these cars it may help . Can't remember any other cars using a blanking cap but i'm sure there are others. HTH

Car builder solutions do one for £6 + p&p. www.nfauto.co.uk

Mine was 3 quid from local factors, just get them to rummage about.