random over heating

[die-tryin]

Any one had random over heating events? Had probs a few weeks back temp gauge going up and dumping coolant from tank etc. had a few goes at refilling it / bleeding it problem sorted was ok for the 30 mile trip home rather than the probomatic cross town trip before bleeding etc. was fine for a few more weeks running about and a 200 ish mile round trip. could leave it running no probs at all till sat night left it running for 15 mins then 1/4 mile the all starts again. had it looked at bleed etc and left for best part of an hour and a short drive all ok again. till 30 mins later whent to go shopping all starts again. any ideas?

[widdowson2008]

I would initially look for signs of coolant leaks personally, and get them fixed.

In the middle of sorting a similar problem. This Bongo in question has had leak problems which occur at varying time spans.
In our case, leaks from the pump and perforated pipework have been identified/rectified. Will know to what success in the next few days.

[wonkanoby]

flush it out and renew stat as well as leak checking

[mikexgough]

flush it out and renew stat as well as leak checking

good start..... might be all that is needed