Car is in getting brakes done, service and polish. Ask mechanic to fit a new thermostat as we know there's no temp gauge and a few posts on temp warning light on. We'll glad I did it was starting to stick. He should me the old one and even the rubber washer had gone completely sideways on it. Don't wait it's not a big job.

 

Thanks Powerhouse. Model, year and miles please?

 

Well mine is 2007, 95,000 miles and an xkr. But they have gone in xk's to. There is a few posts out there for later models. But i would get it done son as possible, cheaper than an engine,
https://www.britishparts.co.uk/produ...ostat-AJ811788

 

Changed mine last year, 2007 XK, thermo stuck open (better than closed), was causing a CEL, and posting a OBD code.

 

Replacing the coolant and thermostat both every 5 years or so is smart preventative maintenance.