Rust Proofing for Canada - 2014+ Jeep Cherokee Forums
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post #1 of 28 (permalink) Old 01-01-2015, 08:05 AM Thread Starter
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Rust Proofing for Canada

What do you think about Krown rust proofing and drilling access holes? I looked at my KL and could not find any high point (not drainage holes) on doors and rear hatch. The hood is the exception but the sound proofing panel must be detached.

IMO, drilling holes will break the paint surface and invite rust. Please don't tell me to consult with Krown because they will assure me it is fine, I would like to hear from those who has actual experiences.

This question/discussion based on my own experience with a Mazda MPV, the doors rusted from inside out. Once you spotted it, it was too late and I don't want it to repeat.

Many owners on this forum did not think additional rust proofing is necessary because Jeep has done that from the factory. It makes sense if you trade your car in every 3-5 years and your roads are not salted.

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post #2 of 28 (permalink) Old 01-01-2015, 10:26 AM
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I would post this question in http://www.autos.ca forum. We don't need it out here in Alberta, but I know many members on that forum swear by krown.
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post #3 of 28 (permalink) Old 01-01-2015, 10:32 AM
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They put some kind of grease on the hole before closing it with a plastic plug to prevent rust catching there... Long term wise I don't know if it's efficient or not. They use a special drill bit also that prevents burs from the drilling...
They did damage my hood gasket with their product though, make sure they protect it with a good spray of sillicone prior to the rustproofing treatment and make sure they don't overspray in that area... They did replace the gasket, but only because my vehicule was less than year old.

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post #4 of 28 (permalink) Old 01-01-2015, 10:57 AM
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Rust proofing

Aftermarket undercoat and rustproofing probably voids the perforation warranty, proceed with caution. Check with the dealer, get any "sure it's ok" in writing.
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post #5 of 28 (permalink) Old 01-01-2015, 11:43 AM Thread Starter
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Thanks to all replies.

I read somewhere else about damaging bushings and gaskets and appreciate that davidevo50 for citing your own experience. I plan to spray bushings and gaskets myself with silicone before doing it.

I also read up on the warranty booklet and if I understand it correctly, Jeep only covers when rust eats through the metal sheet during warranty period. Therefore, the warranty effectively covers nothing.

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post #6 of 28 (permalink) Old 01-01-2015, 04:20 PM
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You don't need rustproofing. Manufacturers do not supply repair parts beyond 10 years of manufacture. When it biodegrades get a new vehicle. If you want it forever hermetically seal it and put it in a museum. Every vehicle I ever owned was Totaled before it rusted out.
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post #7 of 28 (permalink) Old 01-01-2015, 04:41 PM
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I've had every new car I've owned in the last 45 years rust proofed, under coated, etc. and have never had a problem with rust. Maybe it is not necessary on the KL, but my '64 International Scout 4x4, which was touted to be built of galvanized steel in many areas, rusted out in 5 years. So, I've had all my new cars rust proofed since then, and have had no problems, ever.

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post #8 of 28 (permalink) Old 01-01-2015, 04:44 PM
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I should have added that I was living in Connecticut and Maine when I had the Scout, and the roads were well salted. We don't have that problem here in B.C. but, nevertheless, our T'Hawk is undercoated and rust proofed.

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post #9 of 28 (permalink) Old 01-20-2015, 04:13 PM Thread Starter
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I got my Jeep rustproofed at a Krown location in Mississauga, ON. I now understand why they wanted to drill holes in our cars.

They had one person to drive the car in. Once done, he also washed the car and drove it back out so his clothing would not stain the car.

The second person did the drilling and sprayed into door panels, hoods and hatches.

Then they got the car on a hoist, the 3rd person sprayed the underside and wheel wells.

They applied lithium grease to the drilled holes and plugged them tight and clean. I would overlook if I did not know what to look for.

This process allows them to move the cars along at good rate on busy day. Someone may argue that modern cars may already have access points but they can't not stop and look for those. The process took about 45 minutes.

I did not get a lot of drips because the cold weather froze the oil a little and our Jeeps have plastic cover panels running along the body. Those must have collected a lot of oil drips.

Overall, I feel better seeing how it was done, will see how the Jeep fare in the next 5-10 years.
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post #10 of 28 (permalink) Old 01-20-2015, 04:37 PM
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Quote:
Originally Posted by sanghill View Post
You don't need rustproofing. Manufacturers do not supply repair parts beyond 10 years of manufacture. When it biodegrades get a new vehicle. If you want it forever hermetically seal it and put it in a museum. Every vehicle I ever owned was Totaled before it rusted out.
Manufacturer's may not supply parts beyond 10 years, but there are always numerous aftermarket options available.

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