Dust in Prado

Submitted: Saturday, Aug 17, 2019 at 15:57
ThreadID: 138951 Views:2121 Replies:13 FollowUps:3
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We have just travelled outback in our 2017 Prado and the dust entering the rear door has been terrible. A Toyota mechanic told me it is a common problem. Are there any suggestions how this problem can be solved?
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Reply By: Rangiephil - Saturday, Aug 17, 2019 at 17:17

Saturday, Aug 17, 2019 at 17:17
Just about any car will get dust inside if the operator does not take precautions.

1 run the airconditioning on fresh when there is no traffic around with the fan on medium.
2 When someone comes the other way task your copilot to turn onto recirc until the dust clears.
3 I find that blocking the outlet vents in the back helps to pressurize the car.

4 check with a piece of paper or whatever that the rear door seal contacts all the way around and if not adjust it.

5 look under the trim panels to see if there are any unfilled holes in the panels and if there are bog them up with Sikaflex or similar.
If you do all that you may still get a bit of dust in but not as much.
AnswerID: 627317

Reply By: Member - Stephen L (Clare SA) - Saturday, Aug 17, 2019 at 17:19

Saturday, Aug 17, 2019 at 17:19
Hi Lloyd

It will happen to any vehicle and the best way to stop it is to have your air system to fresh, and not recirculating, turn on your a/c and that will pressurise the vehicle and any air escaping from your vehicle will be forced out of areas where it is not sealing, and in doing so will stop dust entering your vehicle.


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AnswerID: 627318

Reply By: RMD - Saturday, Aug 17, 2019 at 17:59

Saturday, Aug 17, 2019 at 17:59
For dust to enter there has to be a negative pressure inside. I had a 60 series LC. And made a rear side door window insert which fitted into the upper channel and held in by the window wound up. It directed air into the insert and straight to the rear compartment, thereby pressurizing it. Having seals actually seal as mentioned above is a good starting point. The vehicle design must be causing dust to be sucked up to the rear door, does it have a downward air director built into the rear door to destroy the vacuum caused by forward movement? If not effective, there will be dust to the seals and drain holes of rear door. Redirecting or increasing air from over the door to wash down the rear is very easily done and works.
AnswerID: 627320

Reply By: Member - mark D18 - Saturday, Aug 17, 2019 at 18:25

Saturday, Aug 17, 2019 at 18:25

Had a Nissan Patrol with a barn rear door with bad dust problems and the same problem with a 90 series Prado

My hundred Series IFS with the 2 piece folding tailgate just completed 6000 km on mainly dirt roads had minimal dust ingress

The Barn doors just don’t seal as well probably because of the weight of the large single door .

Just my thoughts
Cheers .

AnswerID: 627321

Reply By: gke - Saturday, Aug 17, 2019 at 19:46

Saturday, Aug 17, 2019 at 19:46
Lloyd, I take the spare off the door and put it on the roof rack and this helps on my 2009 Prado 120 .

Also check the rubber bungs in the rear quarters are not letting dust in from below.

I agree with the pressure remarks above.

Good luck, Graham
AnswerID: 627323

Reply By: Frank P (NSW) - Saturday, Aug 17, 2019 at 23:08

Saturday, Aug 17, 2019 at 23:08
I had a 2007 120 Series with factory towbar fitted by my dealer. The monkeys that fitted the towbar didn't properly insert the harness grommets, one of which was difficult to get to. I got heaps of dust as a result, inside the rear linings and roof lining.

Agree re the barn door with the spare wheel hanging off it - very difficult to seal that. Try to create positive air pressure.
AnswerID: 627326

Reply By: Member - Mark (Tamworth NSW) - Sunday, Aug 18, 2019 at 08:50

Sunday, Aug 18, 2019 at 08:50
This was a problem with the first of the present shaped Pajeros (NM 2000 to about 2005). It could be fixed with a new rubber sealing system once Mitsubishi accepted their design fault, they fixed it on subsequent models. I haven't had too many issues in the last 500 000km in my subsequent two vehicles despite doing a few thousand kms on dirt each year (though dust on rear door sill is a PIA)

Tyre on rear door may not help, but I think it's something you should be haranguing your dealer with, may be a light alignment problem on your door, or issue with the seals.
Air on fresh and fan on high works for me, it's also stated in my Pajero owners guide
Best of luck
AnswerID: 627327

Reply By: RMD - Sunday, Aug 18, 2019 at 10:18

Sunday, Aug 18, 2019 at 10:18
Do you have window sun shields on your doors?
Did you travel on the dusty roads with any windows down at any stage?
If any front window is down a little and you have sun shields too, the passing air from around the A pillar simply draws air out of the vehicle and causes a negative pressure inside, that will draw in dust through any rear door or vent hole, even though you may have the fresh air vents of dash open.
AnswerID: 627329

Reply By: Member - Rowdy6032 (WA) - Sunday, Aug 18, 2019 at 12:36

Sunday, Aug 18, 2019 at 12:36
Hi Lloyd

We have had a 2007 Prado since new and never had a problem. Have travelled over plenty of gravel and dust.

We always have the aircon on as recommended above.

If it is still happening with the aircon on I can only think you must have a faulty seal.

AnswerID: 627335

Reply By: Member - peter_mcc - Monday, Aug 19, 2019 at 01:05

Monday, Aug 19, 2019 at 01:05
We've got a 2014 Prado. If you have it on recirc the dust is pretty bad. If it's on fresh then ours seals pretty well. What setting were you using?

If you're driving on lots of dusty roads make sure you check the cabin filter behind the glovebox.
AnswerID: 627342

Follow Up By: RMD - Monday, Aug 19, 2019 at 08:24

Monday, Aug 19, 2019 at 08:24
Peter, and Rowdy
If it makes a difference having the air flow on "recirc" or Fresh flow it definitely means the rear door or any door isn't sealing, jt's just the airflow through the gaps is flowing the other way.
Having fresh is a good idea, just the dust laden airflow is prevented from entering, ie, has changed direction with positive pressure inside, but it doesn't mean the door is sealing better than before. Nothing has changed there.
Adjusting doors so the seals actually clamp the surface may be a good idea.
FollowupID: 901317

Follow Up By: Member - peter_mcc - Monday, Aug 19, 2019 at 11:37

Monday, Aug 19, 2019 at 11:37
I'm not sure you can make the door seal any better - if you have any success please let us know! I've read on PradoPoint that other people have asked Toyota about it and were told that's just how it is.
FollowupID: 901320

Reply By: Rainman WA - Monday, Aug 19, 2019 at 08:14

Monday, Aug 19, 2019 at 08:14
One known area of dust ingress is the vent at the rear of the vehicle. It has a flap that doesnt seal properly in a lot of cases and can let a lot of dust in.

A few owners on Pradopoint have actually sealed the vent off which seems to help with the dust ingress, but probably doesnt help with air circulation.

AnswerID: 627344

Reply By: Member - Neil T6 - Monday, Aug 19, 2019 at 10:31

Monday, Aug 19, 2019 at 10:31
The early 70;s model Falcons were notorious for dust and water leaks. In the dealership where I worked the procedure used to be to shut all the windows, light a couple of smoke bombs in the car and you could see where the leaks were.Sometimes it's easier using a torch to see if there's any smoke leaking out. Don't know if those smoke things are still available.
Fixing dust and water leaks !!!!!!!!!!! probably the worst job to do on cars.
AnswerID: 627346

Reply By: Member - DOZER - Monday, Aug 19, 2019 at 11:05

Monday, Aug 19, 2019 at 11:05
aircond on fresh as much as possible
b4 you bag me out, walk a mile in my shoes, then your a mile away and have my shoes :)

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AnswerID: 627347

Follow Up By: RMD - Monday, Aug 19, 2019 at 15:26

Monday, Aug 19, 2019 at 15:26
Many people have said to have the "aircon" ON. The blower fan on fresh setting, yes, but whether the aircon is on or not probably doesn't make any difference.
FollowupID: 901322

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