Last summer, i decided that my Bella was due a radiator change and decided at the same time to renew the themostat and change the coolant from the Blue to the Pink long life stuff. Ordered the radiator from the Boston crowd on ebay who had been offering replacement radiators at a very attractive price. Called them and told them that i did not need the hole for the sensor and would they stick a bung in the sensor hole. Radiator arrived and i spent a saturday flushing and installing and all was good.
Over the space of a few months, i noticed that i was still loosing coolant, so checked all hose clips and retightened and still the leak continued.
Over Christmas, i loaned the car to my daughter while she visited school friends and got a call at 2am saying she was stuck at side off road as the car had reached 130o and the header was empty. The following day i had my mechanic check it over and he came back with bad news ....Head gasket!
I have just finished the install of a new gasket and replacement head and while doing everything was attempting to identify what had caused the problem? Last night just as i was checking radiator prior to install, i noticed the bung hole was covered in coolant sediment and upon further investigation it simply fell out into my hand.
They had literally just "Bunged" the bung into the sensor hole and this had been the cause of my nightmare, should have given it a more thorough check prior to install.
Now all i need is some of that plumber sealant stuff for plastic threads ..... anyone remember what you call it?
So be warned, if you buy a replacement radiator with the bung in place, be sure that it is properly in place and not just bunged in!