The best way is to remove the battery. Certainly the terminals should at least be disconnected so that they and the posts can be cleaned thoroughly. Also the corrosion on the positive terminal indicates an overcharging situation, so that should be addressed as well.
Good video. Should unhook the negative(s) then positive(s) (on diesel). Use a scraper style cleaner for posts and lead terminals, I still use a wire brush to clean the hard terminal clamps. Also use of a memory saver may be of benefit on many vehicles to retain data written in volatile RAM. A great time to test the battery during this time, on a diesel the batteries need to be tested individually.
Battery posts corrode because of leaks around the post where the case is supposed to seal on the post. I always use some silicone around the post where it connects to the case and the problem is solved. Good to do this when its brand new.
Pour Hot water over the terminals with no need to remove the cables. Then use Vaseline around the bottom of the 2 terminals to prevent the vapors from forming new corrosion on the terminals.
When you see this much corrosion on a battery there is something wrong in the charging system. Could be just a loose terminal or possibly not enough charge from the alternator. I learned this many years ago from a battery so to speak specialist and in the military as a mechanic.
Nice how to video John. My only question/thought is I don't know that I would want the corrosion going into my vacuum. Do you think it could do any damage to the vac?
Pat-413 Great minds think a like. I also thought about that and use my oldest shop vac just in case. Technically the chemical reaction has already happened therefore it should not cause a problem and with The shop vac being plastic it should not cause any corrosion. The filter on the motor should keep any particles out from going in there, so technically everything should be OK.
@@JohnEngel OTOH, the fact that the magic foam is turning PINK suggests there's still some "reactivity" left in that pretty blue powder... NOT a chemist... just a half-baked farmboy with no spare shop-vacs ;')
Don't ever suck up something you don't want hanging in the air if you don't have a proper filter on. HEPA minimum. Acid is one of them. Just use baking soda and water to neutralise it then wipe it off. Big no no to even use a shop vac for this, its lazy.
I have had a 2011 Sonata since 2014. I never had corrosion. I was working on my girl's 2017 Altima. The positive connector was a sand castle. Why would it be so over charged?
Most likely there is a small leak of battery gasses around that post. These pads absorb those gases so they do not create a build up. Great question and thank you for asking.
I picked up some of these pads at O’Reilly‘s auto parts. Put them on the car. They seem dry. Do they need some sort of oil added to them that they don’t include for shipping purposes?
Very informative.thank you. Experiance with this issue has turned me into a firm believer in using the felt rings so thanks for the link. I went to 2 stores today, Wall Mart had terminals, Harbor Freight's DIY candy store surprisingly had nothing, neither had the felt rings. Could be a Covid issue I guess....
That usually means that the terminal needs to be tightened or should be replace. In some cases the terminal is slight tighter at the top which means you would need to remove the felt or replace the terminal.
Your making it more complicated then it has to be. Just boil hot water and pour a cup hot water over the cable no need to disconnect. I put a bit of baking soda a too. It fizzles like soda and dissolves immediately!
Robert when you are good you are good. It was cracked and couldn’t come off with replacing the terminal. We cleaned it and then had to get a ford terminal.
@@JohnEngel at the first 2 minute of the video , I was trying to see what you are doing in the corrosion part but written that clarifies what you are saying in the bottom of the video was blocking the view , but it’s good info
no wonder u have corrosion all the time , no post brush used , no grease used on the post , no sealer used after terminal was put back on , yup corrosion will follow
@@foxkenji theres plenty sealers an protection products out there crc makes a terminal sealer protector permatex also makes a sealer/protector just search battery terminal sealer
This is not the proper way to do the battery service. If you have "BLUE" corrosion is pure acid, the battery should be replaced period and terminal. Corrosion that is "WHITE" is vapor which will happen over time. That battery hold down had corrosion also which needs to be cleaned. CRC battery terminal protector should be used, not the pads they do you no good and big waste of money. Dont follow this video instructions, do it the right way.
