Do you spray your engine with a hose to clean it...

Nah. I actually know what bolts are used for.

>He doesn't know about boots
>He doesn't know what happens when you get your belts wet
>He doesn't know about all the grease build up under his ancient car keeping it running

Well have fun with the shit loads of mechanical problems popping up because you wanted to "Detail" your bay.

compared to doing it the other way:
slightly easier
slightly cleaner finish
much more likely to fuck something
up to you really.

Please explain to me how Jeeps, Hummers, etc. can plow through rivers with water over the hood with nothing more than a snorkel to get air to the engine. They're literally submerging the entire engine and everything.

I guess if you own a Jeep, Hummer, etc you can wash your engines with a hosepipe.
What about everyone else?

I've always heard that a regular hose is fine, but a pressure washer can be a bad idea because water can be forced into connectors and then the heat from the engine bay can turn it to steam which will fuck your shit up.

Yeah
Most of the electronics in the car operate at 12 volts which isn't enough to conduct through water. I usually just cover up the bits that deliver spark then go to town.

A pressure washer isnt necessary though. A had a friend get some spark issues after spraying down his shitty Cleo's engine bay but he didnt cover anything up. And I think he pressure washed it

Did it to my Lancer after leaving the oil cap off by mistake. I just taped plastic bags around anything that looked electrical and it was fine.

No, there is nothing wrong with this. Would likely be a good idea to let it dry out before starting the car tho.

If this actually hurt a vehicle nobody could wash their motorcycle or ride in the rain.

>What about everyone else?
There is nothing unique about those vehicles. Keep the water out of your intake and spark plugs/coil packs and you are fine.