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Ok, I'll try to flush the radiator and check the thermostat housing at the same time.

Coolant level went down a little while I went on a quick 5 min drive yesterday, assumed it was due to some air pockets clearing after I refilled the system. Didn't seem to drop this morning.

Hi Alex,

Not had a chance to tinker today but had a play in the morning to see exactly how the car behaves;

From complete cold, gauge read cold as expected.
Turned on the engine, gauge remained cold for about 1 minute (almost thought that everything was back to normal).
Gauge jumped immediately to ...

Cheers Alex, I'll have another tinker tomorrow and come back with more info.

any way I can easily check the operation of the water pump?

Hi, newbie here,

My X-reg 6N2 has recently started to overheat badly.

Started with the coolant temp sensor dying. I replaced it, but after one journey, the car started to overheat.
Initially, the gauge would rise almost to the top and then drop to about middle.
Now, the gauge will rise very very ...