Is there a final word on engine washing?

[itsnotanova]

I pressure wash the bottom all the time before working on them. Of course they're up on a lift and I have good access to clean underneath. I'm not sure you would really get to that much with a car on the ground. I also power wash the whole motor once it's out, but I wouldn't recommend doing it with the engine still in the car. Mostly because you can't really see where you're spraying in such a confined space and there's some areas that shouldn't have 1800+ psi water sprayed at. You're also more likely to get overspray on the interior. I've had good success with simple green and a garden hose.