ford sierra saphire 4x4 93 cosworth
snapped the water temp coolant sensor in the head still sealed so i purchased 32 mm fitting kit and inserted the new temp sender into the front pipe and extended the wire from the plug but even though it does register the reading is not even coming onto the white part of the temp gauge please help also with not having a temp gauge am worried that i mayhave another problem the header tank bubbles away when engine is turned off as though its bubbling over but its not to hot when engine is running the header is fine do i have an air block please help me