Cleaning after off roading - Page 2 - Toyota FJ Cruiser Forum
Maintenance Tech This forum is for discussion of all aspects of maintenance that should be performed on the FJ Cruiser to keep it operating at maximum efficiency.

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post #11 of 19 (permalink) Old 01-27-2013, 05:26 PM
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Re: Cleaning after off roading

If it gets really muddy and sticky I make sure to let it sit for a day and get hard and clunky and then drive it down the street past my neighbors house watching the mud rockets launch from all over onto the road



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post #12 of 19 (permalink) Old 01-27-2013, 05:38 PM
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Re: Cleaning after off roading

I usually just drive mine through a car wash with the undercarriage sprayer. I've been through some deep water with no breather relocation and haven't noticed water in my fluids. YMMV...


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post #13 of 19 (permalink) Old 01-27-2013, 05:56 PM
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Re: Cleaning after off roading

Pam cooking spray works great for bugs never tried it for mud.

Place a sprinkler under the FJ overnight it will do a good job of cleaning and rinsing the undercarriage.

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post #14 of 19 (permalink) Old 01-27-2013, 05:58 PM
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Re: Cleaning after off roading

If it's thick mud (is there really any other kind though?), you'll want to get that out from under your FJ as soon as you can. There are a lot of little nooks under there where it will lodge.

A useful tip someone gave to me is to use a yard sprinkler. Set it up under your truck and turn it on. Let it keep spraying back and forth under the truck. It will loosen up most everything under there. I do it at night. Next morning, get under there with your hose to knock all the loosened mud out. Don't forget your engine compartment.

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post #15 of 19 (permalink) Old 01-29-2013, 12:40 PM
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Re: Cleaning after off roading

I've pushed mud with my skid plates once or twice. After I get home from the car wash I deburr my rock rails and touch up the flat black as needed, I also grease up the drive train to push any moisture out. I also stick the garden hose in the frame in several locations and give it a good rinse. I also rinse the lower half of the radiators, they get pretty dirty. The reason I even mess with the factory rock rails is because I've cut myself on a burr while working under the FJ.
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post #16 of 19 (permalink) Old 01-29-2013, 12:45 PM
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Cleaning after off roading

The best way to clean the underside is a hand held power washer wand hitting it from every angle. None of the automatic washers will do the job well enough. I place the power washer up above my skids as well to
Flush those out. I'm not sure the sprinkler idea hits it hard enough, or gets all the right angles. The power washer is much more powerful. I have salt to deal with here so I go to all lengths to clean the underside from all angles..

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post #17 of 19 (permalink) Old 01-29-2013, 12:57 PM
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Re: Cleaning after off roading

I follow the sprinkler method and for the radiator cleaning I use the following:
Thexton 467A High Pressure Air/Water Cleaning Wand |

Works great for cleaning out the fins of the radiator.

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post #18 of 19 (permalink) Old 01-29-2013, 01:10 PM
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Re: Cleaning after off roading

I know most of you know this, but the primary reason to wash out and off the mud is because it contains moisture(wata). The thicker the mud build up, potentially the more moisture it contains...and you dont want that sitting up in/against and under the FJ. Espescially goes for shoreline dwellers like me...salty air/dirt/sand...can be real enemies to the FJ's undercarriage(obviously)...

If you live in an area where they salt the roads, this should be a routine for you -off-roading or no...

I get the hose out and put on clothes that can get wet and shoot out everything at every angle(mindful of electrical areas). Then I "rinse and repeat" 30 min later...because much dried mud that did not come out on the first wash has softened, and then gets blown out on the second pass. I have seen it!


Last edited by MotioncontrolMike; 01-29-2013 at 03:47 PM.
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post #19 of 19 (permalink) Old 01-29-2013, 01:26 PM
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Re: Cleaning after off roading

Yeah dont forget to stick that garden hose up behind the fender flare plastics. Youll get dirt out of there for a while!


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