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Old 01-11-2018, 06:17 PM   #1
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Ford SD Aluminum Body to Steel Mounting

I have built a bracket to mount a Viair constant air system under my 2017 F250. The bracket is steel, and it is mounting to aluminum supports under the bed of the truck. I plan to use thin Kydex between the mounting locations to prevent corrosion. I may coat the plastic (Kydex) with dielectric grease to help as well.

Any thoughts about this from those of you with more knowledge about metallurgy and what I need to watch for or do to prevent corrosion?

Thanks
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Old 01-11-2018, 07:34 PM   #2
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Kydex is hard. The grease won't be there forever. I would think the vibrations of the compressor would eventually wear the paint away, then you have no corrosion protection at all. I would use rubber mounts.
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Old 01-11-2018, 08:33 PM   #3
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I think Ford powder coats their frames, I could be wrong, and if so I don't see a problem mounting the bracket with dielectric grease then maybe sealing that with silicone caulk. Of course a thin sheet of rubber would be a good idea also.
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Old 01-11-2018, 08:48 PM   #4
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Maybe mount the compressor to a Delrin block and then the block to the Aluminum. That would isolate it. Stainless fastener to Aluminum unless you can find Aluminum bolts and nuts.
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Old 01-12-2018, 07:59 AM   #5
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It was easiest for me to build the mount out of 3/16th flat aluminium plate primed and painted. It's bolted to the bed's crossmembers in front of the passenger side wheel well. About 2 years no issues.
Click image for larger version

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Old 01-12-2018, 09:27 AM   #6
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Nice! That's exactly where I'm putting mine. Fabbed up something similar with scrap sheet steel I had in the shop already. Difference is I'm going to only mount the 2.5 gal tank there. The compressor is mounting to frame just below it. With kydex walls to keep it from splash.
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Old 01-12-2018, 09:45 AM   #7
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Ford has an SVE Q-222 covering this issue and what they recommend to prevent Galvanic Corrosion
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Old 01-12-2018, 12:37 PM   #8
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Quote:
Originally Posted by 05CrewDually View Post
It was easiest for me to build the mount out of 3/16th flat aluminium plate primed and painted. It's bolted to the bed's crossmembers in front of the passenger side wheel well. About 2 years no issues.
Attachment 160021
Iíve been reading this thread and your mounting idea and fabrication looks great! This will help me stop carrying a pancake compressor with me.
Great job!!!
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Old 01-12-2018, 01:02 PM   #9
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Quote:
Originally Posted by mule View Post
Iíve been reading this thread and your mounting idea and fabrication looks great! This will help me stop carrying a pancake compressor with me.
Great job!!!
Thank you. If you notice, I constructed a manifold that includes 12v solenoid valves. 2 of them are for the UP & 1 is for the Down (air dump) for the rear Airlift bag system. This is operated from the in dash momentary double pole double throw rocker switch.
1 air line is for the triple air horns mounted in the bumper. I also ran an air line up into the stake pocket of the bed with a quickconnect to allow me to hook up the 25' airhose I carry for tires and what not.
I got practically everything through Amazon except the pipe fittings which I got locally.
Click image for larger version

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ID:	160030
Click image for larger version

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Quote:
Originally Posted by ADVtraveller View Post
Nice! That's exactly where I'm putting mine. Fabbed up something similar with scrap sheet steel I had in the shop already. Difference is I'm going to only mount the 2.5 gal tank there. The compressor is mounting to frame just below it. With kydex walls to keep it from splash.
I had planned on closing in the sides with canvas & snaps for the winters but I just have been spraying it with heavy duty silicone spray when I service the truck. Still might though some day.
Sorry for the fuzzy pic but that's all I got for now. If you need links or questions just ask. I'm really pleased with the system.
Click image for larger version

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Views:	90
Size:	33.3 KB
ID:	160032
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Old 01-12-2018, 01:24 PM   #10
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Quote:
Originally Posted by 05CrewDually View Post
Thank you. If you notice, I constructed a manifold that includes 12v solenoid valves. 2 of them are for the UP & 1 is for the Down (air dump) for the rear Airlift bag system. This is operated from the in dash momentary double pole double throw rocker switch.
1 air line is for the triple air horns mounted in the bumper. I also ran an air line up into the stake pocket of the bed with a quickconnect to allow me to hook up the 25' airhose I carry for tires and what not.
I got practically everything through Amazon except the pipe fittings which I got locally.
Attachment 160030
Attachment 160031


I had planned on closing in the sides with canvas & snaps for the winters but I just have been spraying it with heavy duty silicone spray when I service the truck. Still might though some day.
Sorry for the fuzzy pic but that's all I got for now. If you need links or questions just ask. I'm really pleased with the system.
Attachment 160032
Thatís great, I really appreciate the extra effort you took for posting your work and sharing your setup!
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