Lots of things can do that, many types of solvents can oxidize the outside layer of plastic and make it opaque white. It's the same reason (oxidation) that black plastic trim turns gray/white after a while in the sun, but it's oxidized from the sun and not solvents obviously.

 

Purple power and then rinse with the hose. I'm not too picky about the water, I rinse it while it's running. It seems to work better than the Gunk EngineBrite stuff to me, plus the Gunk Enginebrite odors give me a headache when the engine gets hot.

 

purple power is AMAZING at gunked on and old dirt. but it will remove paint too so make sure you dilute it... plus you dont go through quite as much.

 

I've used it on all of my cars and no issues with the paint. I don't dilute it and I can be heavy handed with it.

 

Just be careful.

Don't spray cold water on a hot or running engine.

 

my engine hasn't been started in awhile and it wont be started for awhile...lol

 

Lol, then pull it out and do it right.

 

i thought about it, but with no lift and lack of knowledge, i dont want to mess anything up.
just tryin to clean up the engine bay a bit....

 

Simple Green + Grocery Bags + Freedom Wash = Clean Ass Engine Bay

And yes, i noticed every first letter is in caps

 

car doesnt move, sits in driveway