I have an 07 jk and plan on degreasing under the hood tommorrow. What components should I cover up while cleaning under the hood?

 

I just cover the air intake then sprayed a mixture of Simple Green all over.. After letting it sit a while, I used a pressure washer to blast everything. I then started the engine and allowed it to warm up to evaporate any water left over.

 

X2 on just the air intake. You can shield the alternator a bit from the simple green but not a deal breaker.
I usually use a long handled brush to break up the mud/dirt and wash it off right after. Finally wipe off with a damp cloth so leaves no water spots.

 

Using a pressure washer, with a wide spray tip really minimizes the amount of water you need to blast the grime away.

 

Yes! Completely agree with the Simple Green! I buy the concentrate and dilute it to a 50/50 mix, let it soak, then hose it off with a garden hose before it dries. You might have to do it twice if you don't have a pressure washer.

 

I suggest not to buy the simple green at a car parts store. Places like Home Depot sell it in gallon jugs considerably cheaper.

 

Simple green it works


See.

 

I have found that if you wash it often enough it stays very clean. I just give mine a quick wash whenever I wash the jeep. She's stayed pretty clean.

 

Any other tips? Wash it with the engine running?

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I don't wash engine while running because the fan throws the stuff everywhere. What I do is spray a semi warm engine with simple green. Leave it on for a bit, then pressure wash it with water to rinse. The. I start it up and let the engine heat up to evaporate the water.