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30 votes

Do I need to replace my rotors?

While I cannot see the back rotors very well, I can tell you without a doubt, the front rotors are brand new. You can still see the crosshatching on the surface which means it was prepped. It doesn't ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
18 votes
Accepted

Is it normal to see a bit of rust under the hood?

If that is all there is, there is definitely nothing to worry about. It is just a very mild surface rust and is also on none structural components. The top one looks like an engine mount which will be ...
HandyHowie's user avatar
  • 25.4k
12 votes

Large rust hole in spare tire area. (Completely rusted through) How to fix?

The following repair is cheap, easy and should last for 3 to 5 or more years depending on your climate, but it's not the "correct way" either. Remove the rust, paint and body protection around the ...
alain's user avatar
  • 221
12 votes

How major are these paintwork & rust problems?

If you're okay with the cosmetic affects of the rust then the only one there that I would even remotely consider an issue is the one above the rear window (pic #4). Front & Rear door - there are ...
motosubatsu's user avatar
  • 10.1k
11 votes
Accepted

Modern cars do not rust faster in coastal locations - Myth or truth?

Though each car is different, yes, they may tend to rust faster in coastal areas. This is even true for newer models. Newer models may resist corrosion (rust) better than older ones, but they are ...
CharlieRB's user avatar
  • 9,015
10 votes
Accepted

Trouble installing new bolts into rusted welded nuts

A tap/die is not the same thing as a thread chaser - while it can be used that way, you have a higher risk of cutting new threads instead of renewing old threads. A proper thread chaser will clean up ...
masospaghetti's user avatar
10 votes
Accepted

Can I use old engine oil to protect tools from rusting?

Don’t use old engine oil - it has lots of contaminants in it. Use a fine layer of clean oil - just a drop or two spread with a rag is sufficient.
Solar Mike's user avatar
  • 34.6k
8 votes
Accepted

Is there a way to check for rust on a classic car before purchase?

When purchasing any vehicle, new or old, you will have to inspect it for rust damage. Certain vehicles are known to rust in specific areas due to the nature of their design. Surface rust may just be ...
Jonathan Musso's user avatar
8 votes

Large rust hole in spare tire area. (Completely rusted through) How to fix?

I have no idea if this is legal where you live, or what tools or supplies you have, but this is what I would do to repair a junker/beater. I have used this for quick farm fixes without welding. You ...
CharlieRB's user avatar
  • 9,015
7 votes

Do I need to replace my rotors?

There's nothing wrong with your rotors as far as can be seen from your pictures, it's totally normal to have the edges rusty, it doesn't impair them. What's important is that the disk surfaces are in ...
GdD's user avatar
  • 17k
7 votes
Accepted

Removing rusted partially broken engine fasteners

Your best bet is to use heat. Take a torch (propane will work just fine) and heat the stud portion until it is cherry red. Then douse it in PB Blaster or WD40 or just about any other lubricant. Then ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
7 votes

Wax Coating For Bolts To Prevent Rust

The only way to ensure bolts/fixtures won't rust is to acquire bolts/fixtures which won't rust in the first place, such as stainless steel. Externally applied coatings will only last so long. Due to ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
6 votes
Accepted

how to clean rust on chain (motorbike)?

I would use something like WD40, and a soft cloth to rub the rust away. Then apply the right amount of chain lubricant and you will be good to go. You can use a brass bristle brush, provided you do it ...
JoErNanO's user avatar
  • 1,765
6 votes

Trouble installing new bolts into rusted welded nuts

Have you tried completely drenching them in PB Blaster or a similar penetrating oil? I've seen it work wonders in the past for me. I'd cover them in a layer of that, and let it sit for several hours. ...
Lynn Crumbling's user avatar
6 votes

How can you prevent the frame and undercarriage on your car from rusting?

Rust is a chemical reaction that occurs when metal contacts air and water. The type of reaction is electrochemical, meaning electrons are being exchanged, and salty water being very conductive just ...
tlhIngan's user avatar
  • 12.2k
6 votes

Removing rusted partially broken engine fasteners

Not exactly what you're asking for, but maybe a different solution. I had similar problems with a couple of Chevys. More-or-less, I cut the studs flush, and used a pair of 'split flanges' to join ...
George's user avatar
  • 1,123
6 votes

Do extremely rusty disc brake rotors/pads need to be replaced?

Repair shop liability issues dictates SAFETY FIRST. Brake repairs are safety issues so there's no cheap economical repair. However, you can, if possible, seek out another repair shop and ask for an ...
F Dryer's user avatar
  • 985
6 votes

Wax Coating For Bolts To Prevent Rust

After I de-rusted and repainted the undercarriage on my truck, I wanted to protect the exposed threads on various fasteners. Painting them was not an option, as that would make disassembly much too ...
MTA's user avatar
  • 6,405
6 votes
Accepted

Rust hole underneath door sill cover

How bad is this in terms of structural integrity? From what I see, this will not affect structural integrity much if any at all. There shouldn't be any issue driving the vehicle. The only reasonable ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
5 votes
Accepted

Prevent (or significantly reduce) brake line rust

You've got two choices as I see it here to prevent (or significantly reduce) exterior brake line rust: Use stainless steel brake lines. This is a great option, but SS lines (and I'm not talking about ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
5 votes

Water leaking through visor area into interior

This solution applied to my '82 Oldsmobile back in the day. I suspect you might have a similar situation. The windshield on that car was actually glued onto the front of the frame with a black ...
Ukko's user avatar
  • 885
5 votes
Accepted

Is there something that can be applied to electrical connections to prevent rust and corrosion?

In general silicone gease applied to the parts before and after assembly is a good way to go. It will be pushed out of the way where you have tight metal to metal contact so it won't cause electrical ...
Peter Green's user avatar
5 votes

How to remove rust from gas tank?

I worked at a shop that repaired fuel tanks and this is what we did. No cutting corners, each step depends on the last. The shop had a fancy caustic soda tub and some of the techs would call that an ...
emican's user avatar
  • 223
5 votes

100 Scratches, easy fix?

It would help to see a photograph of the damage. For small scratches, some cutting compound followed by polish and wax should yield good results with no need to apply any fresh paint. Edit Having ...
Steve Matthews's user avatar
5 votes

Do my brakes really need to be replaced due to rust?

Without having seen the backside of the rotor or the thickness of the brake pads themselves, from what I can see I'd say your brakes are far from needing changed, and especially not due to any little ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
5 votes

Large rust hole in spare tire area. (Completely rusted through) How to fix?

You can fix that by removing the remaining rusted metal, and welding some new steel there. There's really no other way if you live in an area with mandatory yearly car inspections. Try to patch the ...
juhist's user avatar
  • 14.6k
5 votes
Accepted

Car Wash in Winter - Good Idea? / Bad Idea?

I wash my vehicles whenever the temperature gets high enough to be able to do so during winter. A film of dried salt on sound paintwork or the e-coating on the frame won't do much damage, but ...
Phil G's user avatar
  • 1,087
5 votes
Accepted

How can I prevent hub and rotor rusting together?

I always put a very thin coat of copper grease on the mating surfaces and also on the mating surface between the rotor and the alloy wheel. Only a small amount is needed and you want to make sure that ...
HandyHowie's user avatar
  • 25.4k
5 votes

Removing rusted partially broken engine fasteners

These bolts can be very difficult to remove due to the rust and heat they are exposed to. The threads are rusted both externally and internally. I've had some success with the following: Soak with a ...
jwh20's user avatar
  • 12.1k

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