I have a 1971 beetle that i just bought and im working slowly on fixing it up for showing. theres much to be done. and ive been kind of overwhelmed with the electronics and wiring for now, but i just decided to open the oil filler cap on the engine (1600) and i saw that theres white gunk collecting near the cap. what could i possibly be? theres no coolant or water in the engine for it to seep through one of the gaskets. please help?