Bought new car: rust on disk brakes after 3 days

[AgMech Cowboy]

19 hours ago, wgdanson said:

Off topic, but relevant.

Rust is more annoying on a cast iron frying pan as the taste gets on the food. Yuk.

Always wipe it with a thin coating of oil after washing.

Yes, good advice and , yes, off topic. ????  

[AgMech Cowboy]

Deleted 2nd duplicate post

Edited September 11, 2019 by AgMech Cowboy

[exemplary21]

This is not normal at all.

 

It clearly indicates that terrorists have dropped some acid on the discs while planting a bomb in your car.

 

You should discard the car immediately.

[Momofarang]

I have never bothered to look at my disk brakes. Just hope there would be some alarm on my dash if they got too rusty. Amazing how much time people can waste with their cars. Glorified piles of scrap metal if you'd ask me. Got two of those painted in white, some Japanese brand I reckon.

[Captain 776]

They are carbon steel.......of course they are going to oxidize (rust) even with just the moisture in the air.

Someone above said they were surprised they were not painted.........never saw that anywhere in my life..........except when someone puts fancy ones on like Ferrari or Porsche or something.

[canthai55]

Use rust converter first - then paint.

https://www.theruststore.com/Rust-Converter-FAQs-W48.aspx

Bought mine in Tesco if memory serves

[millymoopoo]

Perfectly normal for cast iron disks.

It's the fault of the Mag wheels, specifically the large gap between the spokes on the wheels, (more visual) with normal pressed steel wheels you would not notice it as the holes are much smaller.

Painting is not recommended as the heat from the disks will cause it to smoke and/or burn off.

[transam]

1 minute ago, millymoopoo said:

 

Painting is not recommended as the heat from the disks will cause it to smoke and/or burn off.

Mine hasn't, but then I am not a rally driver....????

 

PS. I bought a cheap tin of black acrylic paint, a couple of light passes leaves an incredibly thin coat of paint that covers. Do not use brush on stuff, it is too thick..Of course if you are posh there is paint out there for heat applications..

[brianthainess]

22 hours ago, Crossy said:

Surface rust on the rotors is nothing to worry about (they are cast iron or something similar).

 

I'm quite surprised they weren't painted, but if you don't like the look of it there's nothing to stop you painting the rusted areas. Obviously keep the paint off the braking surface (the shiny bit).

 

They are never painted and should not be,even heat resistant paint could cause a fire ! Rotors get very hot! this is very bad advice and your post should be removed.  

[transam]

1 minute ago, brianthainess said:

They are never painted and should not be,even heat resistant paint could cause a fire ! Rotors get very hot! this is very bad advice and your post should be removed.  

Don't be silly..

[brianthainess]

23 minutes ago, millymoopoo said:

Perfectly normal for cast iron disks.

It's the fault of the Mag wheels, specifically the large gap between the spokes on the wheels, (more visual) with normal pressed steel wheels you would not notice it as the holes are much smaller.

Painting is not recommended as the heat from the disks will cause it to smoke and/or burn off.

Absolutely you could end up burning the rubber flexible brake line.

[transam]

Just now, brianthainess said:

Absolutely you could end up burning the rubber flexible brake line.

Yeh but you used Dulux gloss......????

 

Sunbeam, I have used paint on exhaust manifolds....But it wasn't Dulux gloss..

[essox essox]

19 hours ago, wgdanson said:

Read my post again please. Oil on the frying pan.

mr Danson, people do not read correctly DO THEY???

[Scrubtastic]

There's actually nothing wrong with metal discs developing some light rust after a few hours of stationary time. BUT BUT BUT -- new discs are coated with a thin coat of oil at the factory so that when you buy them new, they don't arrive all rusty. Either Isuzu sucks, or some idiot at the dealer thought it would be a good idea to spray brake cleaner on it before selling to you. Maybe he took it for a ride and wanted to clean off the dirt. Who knows.

 

If you really hate the look and are willing to shell out some cash, there are third party manufacturers of brake discs like Raybestos that pre-coat the non-contact areas with various different substances as part of their manufacturing process. Switch to one of those if you feel like it. Dunno how much they cost in Thailand but in the US they're only about $25-30 each from RockAuto.

 

You can also leave your brake discs (or any other rusted metal) inside a bucket of vinegar to get the rust off for cheap. Although, I'm going to say this, it's pretty menial work bringing out your tools, taking off lug nuts and tires and calipers and brake pads to be able to take out your discs, then cleaning everything, re-lubing, reassembling back and cleaning up all your tools in 90+ degree weather.

[spornb]

Any local Thai garage will resolve the problem, liberal application of grease

 

I can recommend one, when I asked for  routine oil change last time on Toyota Hilux, they drained the gearbox oil

[brianthainess]

8 minutes ago, transam said:

Don't be silly..

I am a qualified registered mechanic with 50 yrs of experience on almost every conceivable type of vehicle you could imagine, no i am not being silly.

[brianthainess]

Just need a quick clean with a wire brush if it bothers you that much, and the white mark is put on to mark that its been checked, you will see these white marks on several other  places  on the car.

[whaleboneman]

27 minutes ago, brianthainess said:

Absolutely you could end up burning the rubber flexible brake line.

Please give a link to any fires from painted rotors. And if my rotors ever catch fire, I'll be pulling over long before any brake line gets burnt.

[transam]

23 minutes ago, spornb said:

Any local Thai garage will resolve the problem, liberal application of grease

 

I can recommend one, when I asked for  routine oil change last time on Toyota Hilux, they drained the gearbox oil

You don't put grease anywhere near a brake disc...

[whaleboneman]

1 minute ago, transam said:

You don't put grease anywhere near a brake disc...

Pretty sure he was joking

 

[Assurancetourix]

What I say ...
Isuzu 3000cc bought as a new vehicle almost ten years ago at the Isuzu garage in Sawang Daen Din;
the brakes at the front as well as at the rear are original;
the vehicle is about 180,000 km;

this vehicle drives daily on red dirt roads and for several days it does not stop raining ...

look at the two pictures I just made ..

 

[transam]

21 minutes ago, brianthainess said:

I am a qualified registered mechanic with 50 yrs of experience on almost every conceivable type of vehicle you could imagine, no i am not being silly.

Really, so they don't make paint for heat jobs...?

[transam]

Just now, Assurancetourix said:

What I say ...
Isuzu 3000cc bought as a new vehicle almost ten years ago at the Isuzu garage in Sawang Daen Din;
the brakes at the front as well as at the rear are original;
the vehicle is about 180,000 km;

this vehicle drives daily on red dirt roads and for several days it does not stop raining ...

look at the two pictures I just made ..

 

Cast irons are not all equal...Depends on it's content stuff.

[Assurancetourix]

1 minute ago, transam said:

Cast irons are not all equal...Depends on it's content stuff.

That's also what I think; ten years ago the metal parts were more cast iron than steel so not prone to rust.

[Assurancetourix]

4 minutes ago, transam said:

Really, so they don't make paint for heat jobs...?

 

It is very possible , there is no heating system on pickups manufactured and sold in Thailand;
I hope that those sold in Europe have one (heating system)

[AAArdvark]

Never drive in the rain

[transam]

37 minutes ago, brianthainess said:

I am a qualified registered mechanic with 50 yrs of experience on almost every conceivable type of vehicle you could imagine, no i am not being silly.

Just for you....

 

 

Now I did not buy the high heat stuff and my discs are still black and unaffected by "my" usage.....

[sawadeeken]

Brand new truck... Yes.... But if you drove in rain and they got moisture then it is perfectly normal..... And Thailand just has lots of rain.........   So I'd guess it is normal and it shows up more since the metal was just recently new and shiny........

[AI5AASIA]

21 hours ago, wgdanson said:

Off topic, but relevant.

Rust is more annoying on a cast iron frying pan as the taste gets on the food. Yuk.

Always wipe it with a thin coating of oil after washing.

What is this Washing a cast iron frying pan?

[transam]

Just now, sawadeeken said:

Brand new truck... Yes.... But if you drove in rain and they got moisture then it is perfectly normal..... And Thailand just has lots of rain.........   So I'd guess it is normal and it shows up more since the metal was just recently new and shiny........

Plus, usually using the brakes dries any water present, but if you park up with fresh water on they will probably get that brown rust colour..