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Old 09-05-2011, 11:37 PM   #1
LiveAloha
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Default how do you keep the underside of the car from corrosion?

Whats a good way to keep the under side maintained and corrosion free? Any good cleaning solutions that you might wanna give a tip on?
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Old 09-06-2011, 12:35 AM   #2
sars101
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undercoating?
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Old 09-06-2011, 08:43 PM   #3
vend
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When I lived in Hawaii, we just sprayed water at the end of each day under the car to wash off the crap from the road; worked for us
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Old 09-06-2011, 09:20 PM   #4
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an issue for anyone living in snowy areas... go to self car wash and use their water gun to spray/clean the salt
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Old 09-06-2011, 10:04 PM   #5
Ct Drummer
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Quote:
Originally Posted by jxkim View Post
an issue for anyone living in snowy areas... go to self car wash and use their water gun to spray/clean the salt
I do this, and every couple of weeks I bring a set of ramps with me.
I put the fronts on ramps and I spray the underside out really well.

Mike
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Old 09-12-2011, 02:18 PM   #6
JJay03
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Spraying it off at the car wash helps for sure. I know Mikes car wash has some undercarriage spray that suppose to help with corrosion.
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Old 09-14-2011, 10:36 AM   #7
theSTIgdrivesanSTI
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Usually any tunnel carwash has an undercarriage spray. Its usually a wax like coasting that seals up and stops anything from rusting.
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Old 09-20-2011, 02:46 PM   #8
drivin blind
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If the weather isn't freezing, I use my lawn sprinkler. Just slide it under and move it around. Winter, I have access to a wash bay with hot water. RP
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Old 09-20-2011, 02:48 PM   #9
fmars62
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when you go to a car wash make sure you get the underbody wash it helps alot
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Old 09-26-2011, 11:14 PM   #10
elow07
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The one thing you have to worry about if you are gonna undercoat is over spray. Any little wind and you will end up with black little dots all over your car. I have seen it happen to a lot of guys. BUT if you can pull it off, it will seal up a lof of cracks and keep it looking nice.
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Old 09-27-2011, 11:59 PM   #11
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I wish the previouse owner of my car would have taken better car of the underside. ALL my heat shielding is rusted reallllyyy bad. in some spots the shields are only held on by like one screw because the others have rusted through!
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Old 09-29-2011, 08:27 PM   #12
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So I lived in Virginia and would drive my STi back and forth skiing all the time. A about 2 years ago I tried an experiment and sprayed LPS3 on some of the rusty bits underneath, specifically the frame bits that connect to the sub-frame - I only did this on one side to see what would happen, on other rusty bits of the frame I smeared anti-seize grease.

(My STi is pretty rusty for such a new car.)

So after 2 years the results are in, the LPS3 kept things on one side from rusting much at all, and so did the anti-seize grease. The stuff that was treated this way stopped rusting compared to the stuff that wasn't rusting or that was not yet rusty. On the side where I didn't treat stuff the rust had spread.

Now I'm slowly going through the car and wire wheeling the rusty stuff and painting it with Chasis-Saver.

The only regret I have about using anti-seize grease and LPS3 this way is that it is a real pain to remove later. When I pulled the sub-frame and repainted it I had a heck of a time getting it off and had to resort to brake cleaner, etc.

The other lesson I learned with this car is to be VERY careful about how I clean the engine bay. Sadly my usual method was to use some engine-cleaner in a can and spray down the engine, let it sit, use a gentle brush and then hose it off with water and let it dry - Well I believe that I should have followed this with some sort of engine dressing or something else - as all the fasteners on the motor are pretty rusty now, and anything that was a bright yellow zinc is now oxidised and a dull grey.
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Old 11-18-2011, 09:56 AM   #13
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I live in michigan and this is always an issue to think about. Im planing on using a rubberised undercoating. And also cleaning every 2 weeks or so. I wouldnt want to do it but ive heard of an old school tecnique of spraying old engine oil all over the underside of your car. after winter spray it off real well. LOL but i cant bring my self to do it and it would suck if you had to work on it at all. LOL
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Old 11-18-2011, 10:19 AM   #14
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I see you're location is Ft Drum. I hate to be the bearer of bad news, but your seasons of 4 months of non-winter and the rest of the year winter really does suck for our cars. Mine spent one winter up there and I drove it through touchless car washes all the time but it didn't do that much to really help. There is no corrosion on the body, but all of the suspension components paid the price. From now on, removing anything can be a pain, also I had a caliper freeze/ stick from corrosion on the sliding pins. With that said, undercoating won't really help prevent the suspension from rusting out. Also, what unit at Drum?
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Old 11-18-2011, 10:33 AM   #15
phate1229
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In addition to what everyone else says about spraying it down I take a couple extra minutes every time I have the car up on jackstands to look for anything that may be starting to rust. Anything that's relatively easy to remove I pull it off wire wheel the rust and repaint it. Bigger things (such as my front subframe which I need to do before it snows) I just make a note of.
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Old 11-18-2011, 10:37 AM   #16
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Definitely need to spray the underside at the car wash if you live in an area that uses salt!
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Old 11-18-2011, 11:44 AM   #17
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oil undercoat. use a good bar-chain lube/oil. don't cheap out (not all that expensive in the first place) and read the label for it's composition. i would recommend husqvarna w/high adhesiveness, high oiliness, high film strength, and of course, anti-rust.
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Old 11-23-2011, 12:29 PM   #18
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Good thread. I'm definitely planning on regular spray downs, but I was wondering if anyone had any opinions on places like Ziebart and the like as far as undercoating is concerned?

I just finished a with a fresh coat of Collinite 885 on all of the body panels so I think I'll be good for a bit there.
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Old 11-23-2011, 09:45 PM   #19
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good ole wd-40.
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Old 11-24-2011, 12:52 AM   #20
BraveSTi
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I never drive it when its wet outside..I'll walk
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Old 11-28-2011, 04:06 PM   #21
zmi
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Default Wurth underbody seal

Get the car safely up in the air after you spray it down and with good light inspect the undercarriage. Then use a wire brush and scratch the loose rust off. Apply some Wurth underbody seal. http://www.wurthusa.com/project/en/l.../chemical.html I reapply as needed. 150k in Midwest IL. and no major rot.
PS. be sure not to plug the drain holes!
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Old 11-28-2011, 06:10 PM   #22
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Self-serve carwash during the winter months to get the undercarriage of the car relatively clean.

I use Boeshield T-9 on everything except for the bushings two to three times a year. It has a wax in it that dries and provides a limited protective coating - limited because it must be reapplied after a few months, but it does work.

http://boeshield.com/
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Old 11-28-2011, 11:58 PM   #23
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Take a look at a product called fluid film. I just applied some of it on my 92X and it seems to be holding up pretty well with all of the weather we have been having here in Ohio.
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Old 11-29-2011, 12:20 PM   #24
bigmaninjapan
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Quote:
Originally Posted by Big-E View Post
Self-serve carwash during the winter months to get the undercarriage of the car relatively clean.

I use Boeshield T-9 on everything except for the bushings two to three times a year. It has a wax in it that dries and provides a limited protective coating - limited because it must be reapplied after a few months, but it does work.

http://boeshield.com/
Holy hell. I love me some T-9 as my goto chain lube on my bikes (their 200 mile claim is dubious imho), but at $120 per gallon I'd be looking elsewhere.
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Old 11-29-2011, 01:05 PM   #25
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Quote:
Originally Posted by zmi View Post
Get the car safely up in the air after you spray it down and with good light inspect the undercarriage. Then use a wire brush and scratch the loose rust off. Apply some Wurth underbody seal. http://www.wurthusa.com/project/en/l.../chemical.html I reapply as needed. 150k in Midwest IL. and no major rot.
PS. be sure not to plug the drain holes!
Where are you buying it at? My in laws live in LaSalle County (Marseilles) so I'd be interested in picking some up for my car.
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