I use Simple Green on a warm, not hot engine, then the water hose.

Ron

i dont know wat all the problems with pressure washers are, i use the lvl 4 nossle on my gas powered pressure washer at least once a month on my engine bay. im carefull not to hit anything like the alt or distrib with a lot of power but i have never had a problem.

X2 I use a pressure washer every time with no problems. I just use quick little shots of water and try not to spray anything directly for too long, and of course stay sway from as much electrical as you can. For me it works just fine

Looks good!

Simple green + pressure washer works for me all the time. No problems as of now.

just gotta be careful where you spray ive done it a few times to get some dirt out a few days after mudding and no problems ever with it

I just did mine this morning since we did a trail ride over the weekend. Baby fired right up afterwards. I don't see why some people have problems unless the Jeep is not maintenanced correctly. You drive through puddles, what's wrong with cleaning the engine?? Here's what I use.....

I believe cd2 repels dirt. At least the can says so. Lol

But tire shine? On the engine? Way to caustic IMO. Too many electrical components in there to take chances for me. Any moisture can introduce rust and corrosion and that stuff is asking for it. It's not typically made for tht environment anyway, I am referring to the closed engine bay at 80mph. Im goin to the zone ill check out the meguiars and how friendly that would be to the ol engine bay. I want to make sure the products I use are made for the application at hand.

i use that purple power stuff too and i love it. it cleans very well. but if you use to much or don't dilute it enough then it will eat your paint

Like many have said here, I have always washed my engine bay dawn with pressure. I usually go to the car wash though and use the tire/engine soap setting they have,although I'm sure it is not available at every car wash.

I have done the same thing. Although not yet on my XJ. But I just drive down to the local car wash. Wash the car then POP the hood. The one I usually go too has a degreaser...says for wheels and engines. Spray it on and let it sit. Usually do that first. Then wash it off. I use the spot free rinse under the hood. It's not high pressure. And won't leave spots. I hate spots...

I've used Simple Green or engine degreasers and hot water from the garden hose for years and never had problems. I sometimes spray the engine compartment down with Armorall to make it look good. I think the Armorall helps prevent corrosion. If nothing else, it makes it look nice.

once your done degreasing and watching...douse it with WD-40....it works really good at preventing corrosion and keeps it clean. I do it on all vehicles and my boat motors to keep grease from building up and water from getting in the electrical parts..just cover the intake with a towel when your washing and spraying with a protectant

X2 on the Purple Power. It is one of the cheapest 2-butoxyethanol based cleaners you can buy. That same chemical degreaser gets sold under a lot of different names and fancy bottles, but why pay extra for a fancy bottle? Walmart sells it for less than $5 a gallon.

Fill up an old 32 ounce windex bottle for about $1.22 and you've got the same degreaser that's in that expensive spray can of Gunk Engine Brite that would cost you $4.00 for 15 ounces.

Look at the MSDS listings for most of those cleaners... 2-butyoxyethanol (Butyl Cellosolve) is the magic ingredient.

I HP wash it like I am trying to sabotage it and they start right up without a sputter. 2000 XJ
I also just use basic, tire foam after a good wash or two. Then, in a week or so I will wash it again and the plastic stays nice looking for 4-6 months with occasional high pressure rinses.