[motornut]

egr valve?that won't have to come out
engine shampoo,pressure wash,cover the carb etc
you can use engine shampoo to wash the covers
inside and out(once they are off,then dry)
but i have just used gas but a varsol would be good too
when you have them out make sure the bottom is flat before they go back in
bottom being where the gasket goes(they warp most need to be straightened out prior to reusing or they leak again) it's normal