[Gorillajin]

Hello
My car was leaking oil from valve cover gasket area for a while, and finally the gasket was replaced. The dealer did not clean the gunk of oil, and it's still there.
I like to clean the oil that way if there is an oil leak, I know right away.

Can I just spray oil de greaser to remove those gunk? Spray water down in the engine bay? Do I need to remove the under cover to let water escape to the floor?

Some of areas are hard to reach, and I am wondering spraying de greaser is enough to remove those oil stain and gunk.

Any advice is welcome.

Thank you.

[codeterrorist]

I would imagine removing the splash trays from underneath will allow the dirty soapy water to drip down so it doesn't get collected on the trays.