Ok quick question, I need to clean my engine(Majorsand/dirt coating the entire thing). I was told that you can wash it at one of those self carwashes. Whats the best way to do this without damaging anything vital? I was also told that as long as the truck was running, you could hose it down without hurting anything. True?

 

hosing while running, not true. Granted it helps, but you can also just be prepared to use an airblower after and/or turn it off and wrap up the electrical things, stay away from anything electrical especially the distributor, fuse box, alternator, etc..