300tdi rocker gasket

Morning all
I am going to give the valve clearance adjustments a go.I will fit a new rocker cover gasket just in case.The Haynes manual is (to me anyway)
Is it just a straight swop or is there sealant involved
Mnay thanks
Paul

there shouldn't be any sealant, but there might be. In any case thoroughly clean both surfaces before refitting with the new gasket.

I had a persistent leak from the rocker so cleaned it all properly (already done a few times) and replaced the gasket with a new one and an absolute smidgin of blue hylomar and job's a good 'un .. no leaks now.

To me it looks like a poor design .. too much surface area not enough bolts to clamp down evenly. Mine had been clamped down very, very tight so I suspect the cover had developed a warp ... I guess this is the same for a lot of rocker cover leaks.