Composite sump

[Spider13]

The engine in my fortwo was rebuilt some 7000 miles ago and they used the composite sump with a rubber gasket but I have found it to be leaking I've tried tightening the bolts which has worked a bit by slowing the leak down but it's still leaking,would I be able to re-use the rubber gasket iff I remove and clean the surfaces or just buy another one,iff so are all the rubber gaskets the same ie for metal and composite sumps
thanks in advance steve

[Buckster]

I expect you will find some old gasket on the mating surface.

[Spider13]

Hopefully not as the rebuild was done by a very reputable smart garage

[tolsen]

Heat rubber gasket in piping hot water and it should regain its original shape. Clean mating surfaces and refit. Use gasket sealant if in doubt.

[Thrumbleux]

Rubber gasket has to be fitted dry - no grease or sealant. If using sealant, dispense with the gasket.