Check it for nasty knocks is the main thing , when Ice cold is easier ! Put it under a slight load like 1400 rpm rattles or a knocking walk away , check engine don't move all over the bay too just be rigid in place
Check radiator for leaks Nd signs of head gasket failure
Get right in rear arches , if you can get in the boot and look behind panels do ! If you see rust it will need a repair soon
Don't be put off by uneven tyre wear