My wife's Peugeot 308 (petrol) has an amount of oil on the top of the plugs, IE between the plug and coil pack. Am I right in thinking that's a sign of the rocker cover gasket leaking? I've took the plugs out and apart from being soaked in oil from the removal, they do seem ok once I clean them. It's also only cylinders 1 and 4.

I can also see oil on the side of the engine, so I'm wondering whether both issues will be resolved with a new rocker cover gasket. It seems to be about £15 for an FAI gasket.

[Edited on 9/7/16 by Slimy38]

Sounds like a cam cover/rocker cover gasket .

Also check the breathers are clear.

Following on from this, does anyone know where I can get a rocker cover gasket from? I've emailed a couple of sellers on Ebay but they're not getting back to me (obviously don't want the business!!). I'm so used to just using Ebay that I'm having trouble seeing who else is out there.

The main issue is that I have an FAI reference number, but I can't yet confirm it is for her car.

I'd like to avoid the dealer if at all possible.

Peugeot or a motor factors !!