tulad ng sabi ni boybi, car manufacturers put some protection on electrical components.. I think the protection is only meant for water splashing under your engine, pag engine wash kasi parang ni-submerge mo na rin sa baha..

but to be on safe side, takpan na lang ninyo yung alternator ng plastic, yung iba pati yung distributor cap.. not sure kung pati aircon compressor kelangan pa