I am new to this forum and this is my first post!! I've learned so much from this site and never really thought about signing up till now! Haha

The reason for this thread is that I have 1993 f150, 5L 302 V8 that I'm looking to restore to a neat game day ride. A strong engine that has about 200k miles on it but was so well maintained from the previous owner that it runs like a top. Gotta love a solid 302 right? Well after a some normal and updated PM done, like transmission and coolant flush, differential lubed, belts and hoses and and plugs redone, etc, for my own peace of mind, I really want to get underneath the truck and treat the undercarriage. It looks like it hasn't been cleaned since of the factory lot. I'm gonna replace the shocks and struts after but what chemicals or methods do yall suggest to use in order to get that old built up grease and minor corrosion that have accumulated and stayed on the driveshaft, axles and suspension and such. Also what undercoat do yall suggest to apply owhen everything is as clear as possible? Thanks guys.

 

I would use 'Gunk' for the grease along with a pressure washer. I don't know what to suggest to use for the under coat and corrosion.

Welcome to the Forum

 

Gunk is good or purple power I think it's called I have tried that also. As for treating the under carriage, por 15 seems to get great reviews. It's what I'm using on mine once it warms up a bit more.

 

Would going pretty aggro with the pressure washer be a slight risk to also promoting some rust/corrosion if not dried thoroughly or saturating a spot that already has some rust, etc.?

 

I would guess no worse then a car wash with a undercarriage sprayer? I worked at one as a kid an it was a series of pressure washer wands with fan tips for the undercarriage.

 

Im going to do the undercarrage of my truck with por 15 once it gets warmer. You can find everything you need on eBay for way cheaper than their website.

 

Or Walmart has it even easier. I'm also doing mine when the weather breaks.

 

Holy crap that stuff is expensive! I hope the idea of "rust" is gone after you use that!!!

 

https://www.f150forum.com/f2/ultimat...ean-up-255465/

 

Aggies,

I'm assuming you live in Texas (not in the rust belt). Since you do not live where road salt is spread in winter, you do not have to use Por 15. Instead, do what I did.
(1). Wire wheel your entire frame inside and out with a wire wheel or cup on a grinder
(2). Treat entire frame with Skyco Ospho (this product will convert any remaining surface rust from iron oxide (rust) to iron phosphate. This will seal the rust and prevent it from rusting any further. Apply 2 coats and wait 24 hours. Your frame will turn a black color if Ospho is properly applied
(3). Paint with a foam brush or spray on Rustoleum Rusty Metal Primer (2 coats)
(4). Paint with a foam brush or spray on Rustoleum PROFESSIONAL gloss black or flat black paint (At least 2 coats)
My frame looks fabulous and has held up for years with no signs of rust.
Por 15 is over kill if you don't live above the Mason-Dixon Line !!!!!!