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GEN 4 Jimny undersealing

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17 Aug 2019 21:20 #212223 by Micheal
I've just acquired an SZ4 and am less than impressed by the pattern of undersealing on the vehicle. Given known Suzuki rust problems on the Gen 3 Jimny and other vehicles (I had a Grand Vitara that rusted badly by year 10) would you advise undersealing? The dealer advises that Suzuki will state that having this undersealing will invalidate the 12 year corrosion warranty.
Thanks

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18 Aug 2019 05:37 - 18 Aug 2019 05:39 #212228 by facade
Replied by facade on topic GEN 4 Jimny undersealing
Get it treated if you are keeping it. I have just Dinitrol'd mine (smells terrible.)

The Gen 4 seems not to have some of the rust traps of the Gen 3- the front body mounts are different, but adds a couple of new ones - there are two rust trap boxes on the sides of the chassis that I can't see what they are for.

Anti-corrosion warrantys are generally worthless, as they rely on paying for an annual inspection and any corrosion to be treated (expensively) and are only for rust that has penetrated entirely from the inside (which I suppose was the case with front & rear mounts on the Gen 3, but no doubt there would be some exclusion because it develops at seams)

My Gen 3 managed to get to 19 without any welding (it needed it then though), I Dinitrol'd it when I got it at 9 years old, I'm hoping this one will get to 25 by dinitroling from new. (No doubt it will be electronics failures that kill this one)

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)
Last edit: 18 Aug 2019 05:39 by facade.

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18 Aug 2019 07:24 #212233 by RainerK
Replied by RainerK on topic Re:GEN 4 Jimny undersealing
I used 8kg of Mike Sanders fat. Inside of the frame, doors, hud, .... and also on the underside of the car.

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18 Aug 2019 12:11 - 18 Aug 2019 12:26 #212248 by Andy2640
Replied by Andy2640 on topic GEN 4 Jimny undersealing

I've just acquired an SZ4 and am less than impressed by the pattern of undersealing on the vehicle. Given known Suzuki rust problems on the Gen 3 Jimny and other vehicles (I had a Grand Vitara that rusted badly by year 10) would you advise undersealing? The dealer advises that Suzuki will state that having this undersealing will invalidate the 12 year corrosion warranty.
Thanks


That pricked my ears up.

In what way is the anti-corrosion pattern no good? First time ive heard someone comment on the stock anti-corrostion protection.

Ive had a good grope of the wheel arch protection, which seems a little thin. Ive also noticed some abrasions and cuts in the layer of protection (whatever it is) seems like some sort of gum. But these cuts have gone right through the layer, and expose the metal work. If rust starts there, it is effectively compromised... no?

Mhhhh, i gotta this booked in asap.

Edit: Also a bit worried about the potent odour this ditrinol treatment causes. Has anyones odour faded yet? (Giggle giggle lol).


A wise man once said...... When we are Mean, Shout at People, Lose our Tempers, Swear, and generally act like Tool Bags, Never forget ..... We are all Cavemen in Suits, Uniforms and/or Overalls ..... Living in Semi-Concrete Jungles. Andy - 2019 AD.
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Last edit: 18 Aug 2019 12:26 by Andy2640.

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18 Aug 2019 13:46 #212252 by facade
Replied by facade on topic GEN 4 Jimny undersealing
I think the stock coating is the absolute bare minimum- makes sense really, if Suzuki can save £2 worth of sealant per car that is a nice new office block by the end of the year.

The reason mine stinks is I pulled the rear and sill trim and gave it a good dose on the inside round the rear wheelarches, down into the rear body mounts, across the rear crossmember, and down the bottom of the B pillars (crikey! I forgot the A posts and inside the screen pillars!- something to do next week I suppose..) You have to remove the seat belt reels to do it properly.
I'm running round with no trim, hoping the solvent will evaporate quicker than if I covered it all over. with hard plastic.

I bought a kit to do mine, and I've loads of the black underbody wax left, I suppose I can give it a fresh coat every few months under the wheelarches.

I had to buy a wax injection gun though, the schutz gun I have has a tube that needs bigger holes drilling than stock- I spent half a day making a narrow tube and nozzle and it didn't work, as there wasn't enough flow over the paint tube.

Probably easier and about the same total price to just get it done.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)

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18 Aug 2019 14:24 - 18 Aug 2019 14:24 #212256 by Digger1
Replied by Digger1 on topic GEN 4 Jimny undersealing
Mine has been undersealed by a Dinitrol specialist they did a really good job and I am well pleased. See pictures.
Last edit: 18 Aug 2019 14:24 by Digger1.
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18 Aug 2019 14:36 - 18 Aug 2019 14:42 #212257 by DAGZOOK
Replied by DAGZOOK on topic GEN 4 Jimny undersealing
The Gen.4 Jimny only seems to roll of the production line with stone-chip rubberised paint protecting the underside. I doubt any off the major manufactures add additional rust protection. Dinitrol is just a brand, there are many other great rust proofing solutions out there (Bilt Hamber is my personal favourite). The professionals that offer these under-body treatments do a great job don't get me wrong. But boy do they charge you for it! Plus the black/brown tinted waxes that they use look pretty unattractive, Especially if you've just bought a gleeming new Gen. 4. I had this treatment done on my '98 BMW Z3 by a local specialist, It ruined the immaculate underside!

www.bilthamber.com/corrosion-protection-and-rust-treatments

I'll be buying some Bilt Hamber Dynax UC (which is clear, but otherwise the same as the Dynax UB - brown) and applying this stuff up on drive-up DIY ramps once a year. :cheer: :cheer:
Last edit: 18 Aug 2019 14:42 by DAGZOOK.

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18 Aug 2019 18:25 #212264 by Gadget
Replied by Gadget on topic GEN 4 Jimny undersealing
I had mine Dinitrol coated as well. Not sure how necessary it will be, certainly the bare metal rock 'chip' I got on the bonnet didn't show any hint of rusting, so I'm guessing the panels at least are galvanised.

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18 Aug 2019 20:34 #212270 by Soeley
Replied by Soeley on topic GEN 4 Jimny undersealing
I had mine Dinitrol'd and the smell only lasts a couple of days. I didn't have the inside done though, just the under body and arches. I think it is a worthwhile investment if you plan on keeping the Jimny.
The following user(s) said Thank You: Andy2640

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18 Aug 2019 21:15 #212273 by Micheal
Replied by Micheal on topic GEN 4 Jimny undersealing
Thanks for all your comments, very useful. I think the general view is that the factory undersealing is inadequate. Certainly there are significant areas on mine that seem to have been missed completely and in vulnerable areas and I can't see how this car won't rust badly unless it is thoroughly washed underneath every week religiously. I tend to think it is good advice to forget the warranty and get it undersealed. I agree with the thorough approaches described above and would be nervous about entrusting this job to a third party... it must be tempting to scrimp on the prep and dismantling for a superficial covering and thereby speeding throughput. Not sure I'm up to all the faff around dismantling trims etc so next question is whether anyone can recommend a firm who can be relied on to do this thoroughly (Scotland or N England)
Micheal

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19 Aug 2019 10:38 #212283 by Bob1050
Replied by Bob1050 on topic GEN 4 Jimny undersealing
Think carefully about what you are trying to achieve - if the Jimny is assembled from zinc coated steel, then adding 'underseal' will have a very limited impact on the speed at which the underlying steel rusts. It will offer some barrier to stone chips and for some folk might be more attractive cosmetically. Any anti-corrosion properties are not reaching the steel itself - they will sit over the factory applied finishes. Little harm in applying any of the off-the shelf 'waxy' type finishes but the jury might be out for a long time before the benefits are realised. I've sprayed a few vehicles myself - lack of trust in commercial applicators. If you are comfortable using a £1 household plant sprayer and have a can of your favoured material - then you can do it yourself and know it has been thoroughly done. The Jimny is a small vehicle so I don't see it being a big job - could be a bit messy though!
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19 Aug 2019 10:54 #212284 by Bob1050
Replied by Bob1050 on topic GEN 4 Jimny undersealing
Approach I usually take - Pick a warm dry day - Stick car on ramps - thoroughly clean the underside and then leave to ensure it totally dries off. Cover ground with an old sheet and wear a paper/disposable boiler suit and a face mask. Add your coating material to spray (thinned as recommended) and just methodically work your way around - avoiding exhaust and brakes. On a warm day it sprays/penetrates/coats/sticks much easier. Avoid really thick coats but accept it will probably run/sag/drip in places. It will smell for a few weeks and you might get a few drips on a hot day or from areas that heat up. You will really learn/understand your Jimny by the time you finish and every year you can respray over a few areas where it might 'wear off' - usually where the wheels spray rainwater, snow or mud up. Upon completion dispose of your overalls/drip sheet responsibly and don't smoke or you might need the fire brigade.

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