I used Chassis Saver to paint/seal the undercarriage... Pics*

5point9limited

New member
Hey guys I used Chassis Saver today to seal up all of the rust under the Runner today. My buddy did his 2007 Ram 2500 Cummins and the 4Runner. Surprisingly, the 4runner had a decent amount of surface rust for a 2011. Every used Runner I looked at in June had a lot, as well.
I have used this stuff on multiple vehicles, including my Jeep. You can paint right over existing rust and it stops it in its tracks. In fact, they say it sticks better to rust, than to bare metal. It's incredible stuff. You could compare it to Por15. Here is a video of Stacy David from Trucks using Chassis Saver- https://www.youtube.com/watch?v=NXrF1n9s3xM

Here is what I did over 2 days (to allow for drying of water). While the truck sat up high on 4 car ramps.
1. I used my drill with 2 different wire wheels to knock off any loose rust.
2. Used the orbital sander (Harbor Freight) to scuff up the everything to be painted.
3. After everything was scuffed and brushed, I doused the whole underside with Purple Power.
4. I then used my gas powerwasher to blast everything else out and rinse it really well. Do not do this on a windy day while outside.
5. Pulled it into the garage and back onto the ramps for better access to everthing under.
6. Hung tarps from the doors to prevent too much overspray from exiting from under the truck.
7. Bought a siphon feed sprayer for $20 from Harbor Freight and filled it with a half quart of the paint and 10% reducer. I used my trusty 8-gallon compressor from, you guessed it, HF.
8. Climbed underneath and sprayed as much as possible, starting on the frame, crossmembers, and A-Arms.
9. Clean up and crack a cold one

Tips:
-Use a spray wax on the paint before you do this to make overspray easier to remove with a clay bar. It will come off much easier. I clayed and waxed mine when it was done.
-Use paint filters when pouring the paint into the sprayer
- Search youtube for more vids on how to.







 
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In the spring I was doing some work under mine and noticed some surface rust. I took a dirty rag and knocked off some caked on dirt and got it somewhat clean. Then I slopped some POR 15 all over. It stuck to the rusty spots and flaked off elsewhere.
 
Looks like you missed the headers and exhaust :loco:

As much of a ***** it is to have to regularly replace windshields (most people at least once a year), I guess it is worth it not to have to deal with frame rot. We use 99% gravel/sand and only use salt on the tops of passes and around Denver. Tons of original FJ40 plow trucks around here.
 
Had a 2010 SR5 and a 2007 FJ that had significant surface rust. Nothing mechanically concerning but just an eye sore. First thing I did when I drove my 2014 LE off the lot was blast all exposed undercarriage frame with rustoleum rattle can BBQ high temp flat black. Cheap, resilient, effective, and extremely easy to touch up. Highly recommended for these toyota trucks.
 
the problem is all those little holes in the frame.... so while the outside might look pretty its inevitably going to rust on the inside.
 
Looks nice. I've been thinking of doing something like this with my 4th gen. I noticed the rear diff fill plug was covered with the new material. Will Chassis Saver make it hard to remove it when changing out the gear oil? I've heard a plug covered with POR15 (perhaps different chemical properties than Chassis Saver) is almost impossible to remove. True?
 
the problem is all those little holes in the frame.... so while the outside might look pretty its inevitably going to rust on the inside.

Which is why I used Fluid Film with a long 360* wand to get the complete inside of my frame as well as the outside. As you said, this one looks pretty but the salt water just sloshes around the inside and eats it away.


And that frame is rust free compared to mine!

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They always market this stuff up in the salty mountains and rust belt.

It SEEMS like a good idea, but as others have stated what happens is that it gets inside of the frame through all the screw holes and eats it from the inside.

Most of the 4Runners that get used year-round here in S. Coloradostan have turned a faint orange from the sand and gravel blasting--which then is mixed in with that liquefied magnesium salt.

I have no idea how long it takes for a modern vehicle to rust through to hell, but I can say that surface rust is purely cosmetic and if you did this because you can't stand the look of surface rust, more power to ya.
 
Our 2011 4Runner had MUCH more surface rust than my buddy's 2007 Ram. I realize that stuff rusts on the inside, but it sure as hell rusts pretty bad on the outside as well. At least you are helping to retard half of the rusting process. We all know that 4Runners/Toyota trucks are notorious for rust issues.
FJ Cruiser


 

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