Burning Smell

[Pudgey Roy]

How's it hanging there lads!
I took me lovely red bird out today for a spin as the sun was shining in a lovely clear blue sky. I was after driving for about an hour, and Roy Orbison came on singing Pretty Woman when I noticed a burning smell! it was only for a few seconds and was like that smell you get from oil on the manifold. It went away, and came back for only seconds again later on. I checked all the fluid levels and had a mooch about under the bonnet, but I could not see any obvious leak. Any ideas?

Pudgey