Rust proofing drilled holes preventive

Hi All

Just got my brand new Tacoma rust proofed and I have a dilemma.

2020 Tacoma trd OR

It was oil spary all around,

my concern is the holes they drilled In The cabin .

total of 4 holes

1. The holes were drilled so the paint has been broken and exposed metal is now exposed. Drilled not professionally so metal bits were everywhere.
They did cover the hole in oil and put a plug in it.

but this won’t stay protected there forever.

my plan is to get a small magnet stick and take out what metal shaving I can inside the hole and clean the area where they drilled with alcohol and prime paint and then used Toyota paint touch it up. After that I want to put a generous amount anti siezed inside the hole and around and spray krown oil (rust proof oil) and put the plug back In.

2. the location where they put the holes in the cabin in the rear is in a exposed area. When the door closes it doesn’t seal this part. As you can see In The photo.

nothing I can do but do what I said in number 1. (Unless you have a better idea?)

the front holes are on the top and when the door closes it pushes on it so I hope this helps moisture from getting in.

Any have experience in this.

Am I being overly concerned?

I should also mention I live in Canada Ontario, and they put a lot of salt on the road. In winter.

 

Did they not tell you they would drill holes?

I’d just do whatever you planned, magnet stick sure, get a coat of touch up paint on the holes and try to get the brush to wrap the backside. Give it some time to dry.

Then I can’t tell if the grommets have cutout holes for a spray wand but if they do, replace with solid grommets. And then never take your truck back to this anti-rust place.

 

The FUQ. Not sure what your options are, but I would be pissed if that were my truck. That's not rustproofing, that's wreaking a new truck!

 

This is pretty standard for the shops that do rust proofing. The question is did they tell the OP or was it just written on paperwork, and average customers don’t bat an eye so they went ahead and did it.

 

https://www.youtube.com/embed/3-vFYl0F8Fc

 

The fact that those grommet things can deform around the curves makes me think its probably pretty soft plastic and will seal pretty good against water intrusion, so that should help.

Some paint on the bare metal wouldn't hurt, but remember to clean it really well to remove all of the oil before, or else the paint wont stick. Obviously.

Lastly any undercoating Ive ever seen is meant to be done annually, if not more. Assuming you go back to the same place, they will pull those plugs and spray more in there. So even if water does somehow get in, it should hopefully be protected

 

Drilling those holes is common and is really the only practical way to get the product in certain areas. I have never heard of them being/causing a problem. They've been doing it that way for many, many years.

The alternative would have been for you to strip a good portion of the interior trim in order to access those areas and spray it yourself.

 

Krown drilled them into my Subaru. They plugged them but one of the plugs was not seated properly. Check also your doors - that's another area they like to drill even tough there are enough access points. I took out the plugs, cleaned up the area of oil, got some new plugs and sealed them with silicone before putting back in.

 

Can't imagine drilling holes into my new truck. But my state gets salt on the roads like 4 times a year. Only thing i did was use rust proofing between bolt on sliders and the frame.

Disregard the ARB front recovery point and rear diff breather i have planned.

 

I would never drill holes. That spot will never rust even untreated. And there are other ways to get that spot.

 

The drilling is necessary to get to the areas inside the doors, etc...

They are plugged after applying the "goop" all over the inside.

Water does NOT get in. If water comes during rain and gets into door, it's running over the "goop" and out the holes in the bottom of the door.

Don't worry man. I've no issue with 7 vehicles in 30 yrs. That's using Corrosion Free.

Don't waste time with it. It's covered so much in there that H20 never bothers it.

 

100% not necessary. I can get into the doors, dogleg, and all other areas needed on these Tacomas with no drilling.

 

Aren't there access holes and little rubber plugs literally on the bottom side of that same panel? My truck has them and I spray Fluid Film up into that same location every year.

 

Cool. How does this help the OP? or anyone else for that matter?

 

It doesn't. I'm stating a fact and letting everyone that reads this thread know that they should never allow anyone to drill holes in a brand new truck for the purpose of spraying oil in a panel. With that said there is nothing the OP can do short of removing each plug, cleaning the edge of each hole, touch up every edge, re-insert plugs.

 

with the right spray wands, you dont need to drill any holes in a tacoma. the bottom of the rocker panels have 8 or 10 plugs in the bottom, pull them, spray to the next hole. you can also pull the sill/carpet trim, and spray the rocker from the top.

the bottom of the doors drain holes can access the whole bottom to middle of the door panel.

YES, YOU CAN DO IT WITHOUT DRILLING!

I removed a door trim panel this summer for a window issue, found my fluid film spray method from the drain holes reached to at least mid point up the panel, and totally coated the bottom of the door edge/pinch weld/seam area.

i am fully satisfied in my corrosion protecting spray/coverage. spent 6 hours, 2 qts of fluid film, 1.5 qts of wool wax, and 1.5 spray cans to do my annual coverage coating just today. i use the small cans and small long wand to get bottom of tailgate, doors, hood. then use the big pro gun with different wands for the frame, floors, rockers, suspension, boxsides, and fenders.

the main thing is, you have protection, doing your clean up and touch up will help but, covering those drilled holes with a corrosion protector each year, and monitoring them is you best solution. congrats on the new truck! welcome to tacomaworld! Ski

 

This. The spray can straws are perfect for the door bottoms and tailgate bottoms.

If you don’t want to pull the plugs on the rockers (if you have steps) there’s small openings on the pinch weld.

I had the rocker plugs off once pre-steps and sprayed the gun in too. I find I use a bit less FF each year but my truck is pretty saturated by this point.

 

This is how I did mine, but I went a step further and removed the B and C trim so I could get down in the pits where they drilled the holes on OPs truck.

But also the tailgate, remove the panel and sprayed that. removed the fender liners and sprayed the holes for the fender flares, and even removed the wipers and cover to spray the wiper tray.

 

It’s a good thing. Krown does this type of work. My FIL lives in upstate NY (lots of salt), been getting Krown service done annually for 7 years I think. Zero rust this far. I just got it done this year after moving in from the south

 

The general consensus here, in case anybody missed it, is that IF YOU DO IT YOURSELF it is entirely feasible to do a thorough job without drilling. I don't think it is realistic to expect a shop to start pulling panels, searching for plugs and using expensive rattle cans when they know their method works and is cost effective for them.

You could try a hybrid approach where you do the areas that would otherwise require drilling and have a shop do the rest if you can find a willing shop.