Right,

I have never noticed it before...

I had been out on about a 3/5 hour drive last night and when I got back I looked under the bonnet and noticed the exhaust manifold slightley glowing.

The engine temprature is always where it should be if not to cold with the new oil cooler.

I dont think I have looked under the bonnet before in the dark so just wondered if its usual for the manifold to be glowing after a long drive?

Yannis

yes