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27 votes

Should I really keep my gas tank at least half full?

I'd suggest there's credence for all of these Your fuel pump overheating if it runs dry Unbeknownst to most, the fuel in the tank cools the fuel pump in most vehicles. The pump sits in a ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
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
5 votes

Corrosion on positive terminal and cable

Corrosion is a result of many things, from normal natural processes to contact with leaked chemicals. If anything I'd also say its more likely that the cracked cable connector is the result of heavy ...
Jason C's user avatar
  • 4,890
5 votes
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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

Inner sill corrosion implications in Rover 45 2003

At the time of the MOT, if it was unsafe to drive, it would have failed the test. An advisory like this one is letting you know that something is starting to look like it could eventually fail a ...
HandyHowie's user avatar
  • 25.2k
4 votes
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Car inconsistently won't start

Thanks for all the help! It turned out that when I got my battery tested and they said it was "good" they were reading it after the battery had been charged from driving it. I had it tested again this ...
Phillip Byram's user avatar
4 votes
Accepted

Can corrosion on the subframe be addressed by cleaning and repainting or waxoyling?

If there is no structural damage, you should be able to take a wire brush or angle grinder with a wire brush attachment and clean the affected area, then using the Hammerite, paint the surface to ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
4 votes
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Can finger prints on disc brake rotor cause problems

I've never considered fingerprints to be a massive problem in a "I drive a family wagon to the shops" context but if this is on your Porsche just before tomorrow's track day you might feel differently....
Caius Jard's user avatar
  • 1,145
4 votes

Inner sill corrosion implications in Rover 45 2003

MOT advisories are just things that they think you should know, if it was unsafe your car wouldn't have passed its MOT. Sill corrosion is a sign that the frame is weakening, and will eventually become ...
GdD's user avatar
  • 16.9k
3 votes

Should I really keep my gas tank at least half full?

Your fuel pump overheating if it runs dry This is indeed a concern, as with all other fluids in the car. Most car fluids serve dual purposes-- cooling as well as lubrication. You're not supposed to ...
Ivan's user avatar
  • 131
3 votes

Should I really keep my gas tank at least half full?

Half full seems way over the top. I normally refuel somewhere between 1/4 and shortly after the low-fuel warning coming on. If I were out in the back of beyond I would always make sure I had plenty of ...
nigel222's user avatar
  • 201
3 votes

How to remove rust from chromed parts?

I use aluminum foil and Turtle Wax chrome polish on my Harley. The aluminum foil is softer than the steel wool and will not scratch the chrome and at the same time adds a aluminum coating to the rust ...
Calvin Babb's user avatar
3 votes
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Rust From Repaired Chip in Paint Didn't Go Away

So I've thought about this question for a long time now and finally decided to answer. If you really want to keep the rust at bay, then you are definitely going to need to apply a product designed to ...
Dalton D's user avatar
  • 1,958
3 votes

Corrosion on battery post

This goes straight back to Ohms Law as the corrosion is effectively adding a resistor into the starter circuit this reducing the amount of current the starter motor can physically draw. Starting the ...
Steve Matthews's user avatar
3 votes
Accepted

How serious if corrosion on the inner sill of a Ford Focus?

The sills are a vital structural part of a unibody chassis, they provide strength and rigidity which is important in the event of an accident, this is why it's been flagged up in the MOT. Without a ...
DizzyFool's user avatar
  • 1,571
3 votes
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Aluminum parts on motorcycle oxidized after washing

Usually this is either one of two things: 1) the soap used was not suitable - may have had a bleach or some other chemical which may have attacked the aluminium surface, 2) these are just simple ...
Solar Mike's user avatar
  • 34.6k
3 votes

How to remove negative battery terminal

On negative ground vehicles (virtually all cars now), the reason you should remove the negative side first is so that if your wrench is touching the neg terminal, and it makes contact with the body/...
Mobius's user avatar
  • 1,318
3 votes

Can spraying the car with a light layer of diesel help against corrosion?

There is some merit for the suggestion, but with tradeoffs. For the most part, the oil acts as a barrier to oxygen and will prevent a little bit of corrosion. Over time, it'd add up. The tradeoff is, ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes

When to use threadlocker?

It depends on the vehicle but it's not uncommon to see threadlocker specified for assembly. Use threadlocker when it's called for. Today many modern vehicles use one-time-only fasteners instead of ...
jwh20's user avatar
  • 12.1k
3 votes
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Rusted spark plug well/mating surface - is this a concern?

You could cut the threaded part off an old spark plug, knock out the ceramic, roughen up inside the hole, and fill the hole where the ceramic was with something like chemical metal. This can be ...
HandyHowie's user avatar
  • 25.2k
3 votes
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What could be the cause of rust only on the inner side of the brake disc?

The rust is caused because the brake pad isn't touching it there. It is plainly that simple. It could be there is a worn spot in the brake pad or in the rotor for whatever reason. Either way, where it ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes

Prevent inline "waterproof" fuses from corroding

First of all, you need to clean them out. Use some vinegar to do this by soaking them in it. If you can't soak them in it, put as much as you can in the cavity of the fuse holder. Once the reactions ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
2 votes

Car inconsistently won't start

Make sure that the connections at both ends of both battery cables are clean and tight. Corrosion at one end of a cable suggests there may be corrosion at the other end as well. If the car usually ...
DavidRecallsMonica's user avatar
2 votes
Accepted

Battery corrosion cleaned off with baking soda but car won't start now. Does the terminal need replacing?

I would remove that terminal and fit a new one - new terminals are available at most auto spares shops. Do make sure that you get the correct one (positive terminals are larger than negative ones) - ...
Solar Mike's user avatar
  • 34.6k
2 votes

Should I really keep my gas tank at least half full?

I used to own a car that ran on LPG (Honda Accord). This meant my LPG tank was my main fuel source, and the full-size petrol tank was used only when starting the engine, and as a backup. I tended to ...
Hobbes's user avatar
  • 4,412
2 votes

2007 Mustang, Bad battery?

Not necessarily an issue with the battery, but the corrosion does need to be cleaned off or the health of the battery will suffer. Use a baking soda and water mixture with a scrub brush, followed by a ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
2 votes

Battery terminal corrosion?

It's hard to tell from the pictures, but it could be Vaseline. A coating of petroleum jelly helps reduce corrosion and prevent dirt from getting into the contacts. I'd suggest leaving the Vaseline on ...
GdD's user avatar
  • 16.9k
2 votes

Can finger prints on disc brake rotor cause problems

You should clean the rotors with brake cleaner. If it was just normal skin oils you wouldn't have a problem, but your hands were contaminated with all manner of lubricants which are designed to stay ...
GdD's user avatar
  • 16.9k
2 votes

Car has failed MOT, is it worth it?

The MOT report has an option to specify that the car is in such bad condition that it should not be driven at all, and the only way it will be allowed to leave the MOT test center is loaded onto a ...
alephzero's user avatar
  • 2,944
2 votes

Can an insulated copper wire oxidize down its ENTIRE length?

Yes, the oxidation can travel the full length of the wire given time. Used to have to clean the strands and use flux to solder joints on wires like that, patience to scrape them was needed. When I ...
Solar Mike's user avatar
  • 34.6k

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