I have an oily smell in the cabin of my Peugeot 207. On investigating I have what looks like oil around one of the glo plugs, is this normal as the others are fine. Can it just be tightened or do I need to get a mechanic to check it?
Are you sure it's around a glow plug? You don't say what engine it is but if it's a 1.6 HDi then it quite common for the injector seals to leak, which can be fixed by removing the affected injector, cleaning and recutting the injector seat and putting in new copper seals.