Hoping this is just the cam cover gasket. Is it worth replacing just the gasket or do these plastic covers warp over time and won't seal even with a new gasket? Maybe an engine degrease, cross fingers and forget about it instead? It's just annoying as you can smell the oil in the car, especially when the engine is warm. Car engine runs great BTW, quiet and sweet as a nut with no noise or smoke from exhaust hot or cold. 2ltr MK1 Focus petrol with 89k on it. Thanks.

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