What do I need to protect when power washing my engine/s?

I have a '04 Gr. Caravan, 95 Caravan SE and a '90 Honda Accord which I want to power wash the engines. The Accord used to have an old battery whose positive terminal corroded and when I brushed it with hot water, the corrosion splattered on the engine and now looks like rust spots and which I want to power wash. Also, is there a grease cutter spray that I can use? Thanks to all.What do I need to protect when power washing my engine/s?
OK FIRST THING DO NOT POWER WASH YOUR MOTOR, if you want to do so use a low pressure hose. if you use high pressure u might damage connectors by getting moisture in them or damage a sensor you can get engine degreaser from any parts store if your wanting to clean them What do I need to protect when power washing my engine/s?
You can power wash your engine, but leave it running the whole time and use a low pressure nozzle..
Keep your engine running and avoid the battery and distributor

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