Inlet manifold hot spots Cyl 6?

[Topic63]

Just noticed the discolouration around Cyl 6 inlet manifold when compared to the others, however 1, 2 & 3 look brighter than 4, 5 & 6?

it looks as if there is a hot spot for some reason, especially around 6. Car runs absolutely fine, so is this normal or do I need to check anything?

last photograph is how it was some 4 months ago, all seem balanced in colour 🤷‍♂️

Edited February 18, 2022 by Topic63

[Clive]

If you were talking of exhaust manifolds, I would say it would be worth checking the rear carb is not running lean.

The inlet manifold should not get too hot, except it is just above the exhaust manifold. So it may still be the rear carb running weak, and the extra exhaust heat is colouring the inlet. Or even a small exhaust blow (manifold to head gasket, or even cracked manifold) could be colouring the inlet?

Just my 2p worth.