Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
Re: Gasket cement for Valley Pan?
I like RTV silicone on one side of the gasket and a little 3M weatherstrip adhesive on the other. Silicone on both sides would act as a lubricant before curing and may allow the gasket to come out of place.
Neither of these choices were available when these engines were designed. If it were a newer engine the thing would probably call for RTV silicone and no gasket.
Always allow 24 hours for RTV silicone to fully cure.