Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum banner

1 - 5 of 5 Posts

·
Registered
2003 Chevy Trailblazer LS
Joined
·
10 Posts
Discussion Starter #1 (Edited)
So my Trailblazer's frame/undercarriage is pretty rusted so this upcoming summer I'm planning on trying to fix it up before this issue gets any worse. I bought some good wire wheels to grind off most of the rust, rust reformer to seal it up, rubberized undercoating spray to seal it up even more, and lastly some RP 342 to top it off. Does this seem like a good plan? I'm seriously asking cause I don't want to grind and spray all this stuff just to have it peel off and ruin the frame even more. Does anyone have any tips about this stuff or know which way is best to do this? Any advice will be very much appreciated.
 

·
Registered
2004 Trailblazer LS 4x4, 4.2L:, 2016 ATS-V, 2014 CTS-V Wagon, 2018 Audi A7
Joined
·
153 Posts
Any thoughts about welding on some reinforcement steel?
 

·
Registered
2003 Chevy Trailblazer LS
Joined
·
10 Posts
Discussion Starter #4
Any thoughts about welding on some reinforcement steel?
  1. I have given that some thought but the frame is still in pretty good condition (no holes or major thinning seen so far) so I don't see a big need in doing that. But if I see any bad parts I will weld on some plates. Thanks for the reply
 

·
Registered
2002 chevy trailblazer_lt
Joined
·
17 Posts
I wouldn't go with the rubberized undercoating spray and the rust reformer should be breathable. It's been my experience that rubber coating is bad news in the long run, even if it's done on a frame off build where it can be positively sealed from the beginning. When bolts are tightened against the coating, the microscopic shearing that takes place is more than enough to break the seal and allow moisture in. I probably don't have to tell you this but sealing in rust is VERY bad and can lead to the acceleration of the rusting process and increases the chances of catastrophic failure. Sealing a wound up like that allows it to continue to rot, sight unseen, until after the fact. You need to be able to continue treating the rust, if you're not going to 100% remove it.

My rust protection/prevention is a can of silicone spray about twice a year, late spring and late fall. Use the whole can and liberally coat everything underneath (DON'T spray on rotors and calipers). Then let it sit for a day without driving. DO NOT USE WD-40. It was sent here to destroy all the little rubber and plastic parts under there.

I've been doing this for well over twenty years and never had any problems with rust developing or getting worse. Hope it works for you too.
 
1 - 5 of 5 Posts
Top