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Old 01-30-2019, 01:54 PM   #1
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Brake Clean To Clean Rear Radiator

Has anyone cleaned a rear radiator on a DP with Brake Clean? It works great to degrease parts that are caked with grease, and I have a few spots on my radiator that are starting to get plugged up with oil from the inside. Seems to me it should work great. Just wondering if anyone has tried it. Both the CAC and the coolant radiator are aluminum on my coach.
I do have a slobber hose that runs all the way to the rear of the coach, so most of it is rerouted past the rad.
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Old 01-30-2019, 03:46 PM   #2
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It may evaporate so quickly the oil just moves down the coils, not completely off.
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Old 01-31-2019, 10:07 AM   #3
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Plus the fins on the radiator are fairly delicate, especially those with aluminum fins. Some brake cleaners say to avoid use on aluminum & magnesium parts.


I would choose a less volatile cleaner, one that clings a bit longer and does not evaporate so fast. Maybe mineral spirits, but a a detergent solution is probably better yet.
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Old 01-31-2019, 10:24 AM   #4
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if its oil, maybe wd40 or penetrating oil, even engine degreaser. then a soap product like purple power or simple green.
ive found using simple green full strength works if you let it soak with several applications.
use a medium pressure water spray to get it out. high pressure washers will bend the fins. i know.
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Old 01-31-2019, 10:45 AM   #5
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Also, brake clean is very hard on rubber and some plastic parts, so belts,hoses and supports may be affected.
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Old 01-31-2019, 10:57 AM   #6
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Blow it out with compressed air first to get rid of the larger bits. Brake clean will work great for the oil, you just have to be sure to blow it out as well.
The oil residue left over will wash off with the brake cleaner, but don't be afraid to use lots.
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Old 01-31-2019, 11:12 AM   #7
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"G Schulz"......I've helped clean a couple of the rear radiator coaches. My first rear radiator was on a Monaco and they stack them one on top of the other, pretty easy to clean. The sandwiched type, which Freightliner uses, is very difficult to clean, but can be done.

First, get a garden sprayer and use Dawn dish soap as your cleaning agent. You need to thoroughly soak both the Charge Air Cooler (CAC) and the radiator from both sides on both units. Many of the designs, require lifting the rear bed and then lifting the rear metal cover, under the bed, to access the units.

I found that if you make a cheap sprayer out of pvc pipe, you can get down in between the two units. The sprayer would work just like the pvc toilet bowl sprayers. (3' of 3/4" pvc pipe with a hose fitting on one end, capped on the other end and a couple of holes drilled into the pvc pipe sides.) This allows yo to get in between the two units.

If you can, connect the water hose that you use to your water heater drain. This will give you some really hot water to rinse away the grease. You may need to spray with Dawn and rinse a couple of times.
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Old 01-31-2019, 12:56 PM   #8
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Simple green full strength. And warm water to spray it off if you can
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Old 01-31-2019, 01:06 PM   #9
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Simple Green makes a product that is designed specifically for aluminum. It is used extensively on airplane parts. Google it and it should pop up. Have used on my coaches A/C evap which is a side mount.

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Old 01-31-2019, 07:11 PM   #10
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foaming coil cleaner for a/c units
its easy on the fins and hard on the grease
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Old 01-31-2019, 09:09 PM   #11
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Quote:
Originally Posted by beaverfever View Post
foaming coil cleaner for a/c units
its easy on the fins and hard on the grease
That's what I use too, it does a good job of cleaning, and rinses away easily.
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Old 01-31-2019, 09:25 PM   #12
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I was also about to suggest air conditioner coil cleaner, you can buy it in an aerosol can. Check with your local commercial air conditioner parts suppliers
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Old 02-01-2019, 09:10 AM   #13
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I was also about to suggest air conditioner coil cleaner, you can buy it in an aerosol can. Check with your local commercial air conditioner parts suppliers

home depot carries it
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Old 02-02-2019, 03:47 PM   #14
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I have cleaned it with Simple Green and rinsed it very well with a garden hose sprayer. I am getting pretty good flow of water through the fins when I rinsed it off. There are a few spots where it seems not to be flowing through. My radiator and CAC are stacked units and made of aluminum. I think I might try spraying it with A/C cleaner spray and then respray with Simple Green and then a good rinse since the A/C spray is designed to clean coils. I see a trip to Home Depot in my future. I havenít had any over heating problems so this is preventative maintenance.
Thanks for all the suggestions.
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