Related to covering up electrical connections, Nissan "waterproofs" some of their engines. Obviously by "waterproof" I dont mean you can taken underwater, but I mean its ok to high pressure spray anything under the hood. I used to work at an Infiniti dealership and whenever engine work was done, we hit all the engines (except G20's) with a HOTSY(high pressure hot water). The techs said all the Infiniti engines should have no problems with water in the engine compartment. I dont know if it is the same with the X, but they were fine were fine with it. Someone may want to ask a Nissan Tech next time they are getting a service done. But yeah, simple grean and GUNK both all work well. Hot high pressure water makes all the difference in the world though...easy to get tough grime off. Just be careful not to splatter engine gunk onto the paint.
John

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