Im really tempted to power wash my engine, but Im sure if I do Ill mess up the opti? Does anybody know of a good way to really clean the engine good without messing up the opti?

 

Cover it with a plastic bag and pray.....

 

Last time I did it, I put a few plastic bags over the whole water pump and opti area, I also put one down near the Air filer so it wouldnt get too wet.

After that, I just sprayed away and tried not to hit the plasic area too directly. The end result comes out really nice, superclean.

 

Thanks, Ill take both of your advice.