good morning . . . I have a fiesta RS1800 wanted me to indicate one of the valve cover gasket and a gasket crankcase of the best that there have there in your British market has put together two times and new home purchased together in the Ford but the car continues to dribble oil and torque screws were given according to the manual . . . here in Portugal does not have many stores that sell stuff for this car wanted to help one of you there from england . . . hug

 

the rocker gasket will need silicone in the corners, otherwise it will not seal. same with the sump gasket

 

Bon Dir,
Use some LOCTITE 5900 flange sealant, this is the stuff used on production lines when they make the cars, so good stuff but pricey.
chow
tabetha