that yellow one looks like a temp sensor to me shaun, can you post a pic of it removed ?
and what i mean is, to cut the heater pipe and fit a rubber T piece in (cut from a car in the scrappie,s) , then wrap some ptfe thread tape stuff around the sensor thread then jubilee clip it into the T piece :grinning:
http://www.micra.org.uk/attachment.php?attachmentid=15520&stc=1&d=1272986635
