Rising and Falling of Coolant Temp

[v8s4me]

gizzardio said:

...I was more curious than anything else to check the stat out and see it working. Very weird then that nothing happens when sat in pan of boiling water.

If it's not working the way it should then perhaps you should suspect that then? If it was sticking shut and then popping open, it might give rise to the symptoms you describe. You'll soon know once you put the new one in. There should be a number stamped on the lip of the stat; this tells you the opening temperature.

[gizzardio]

Hi

Just an update as always good to share the outcome.

Replaced thermostat and rad pressure cap and it seems all is well now. Temp sitting solid,if perhaps a little cooler than before when sitting at cruising.

Cheers

[NaCl]

Glad its sorted. Do you know which of the two items cured it?

[gizzardio]

I think it was both. The sticking opening of the old stat tested in in boiling water and the leaking cap prob allowed air into the system after running.

30quid fix is always nice!

[NaCl]

It's great when a potentially expensive problem is sorted cheaply and easily!

[Niiige]

Glad it is sorted for you.