When everyone says "grease the battery terminals", what do they mean? Are you supposed to lubricate the posts (with silicone grease) and then put the clamps on (so that the grease is interfacing with the clamped surfaces) or are you meant to clamp to the posts clean and dry and then generally cover with grease? Surely a clean and dry clamp will provide better conductivity?
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Re: "Greasing" battery posts and clamps
Does not inprove contact it causes a poor contact when the grease gets hot and works it way between the terminal end and the terminal post. Don't recommend doing this. just clean the top of the battery with 1 -2 gal of hot water when needed
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Re: "Greasing" battery posts and clamps
The purpose of "greasing" the battery terminals is not to improve conductivity but to prevent water ingress, seal out moisture and prevent corrosion - therefore your assumption is correct - you should make the connections first and then a touch of grease over the top will suffice.
Incidentally believe it or not a touch of ordinary Vaseline over the connection is as good as any for this purpose !!
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I should normally ask you for the identification of your vehicle, but your question is so generic, I would like to throw a couple of answers at you first. I have very easily addressed this problem 50 times in the last 50 years.
1) Problem with a loose or corroded battery terminal. Though it might appear tight, or clean enough, either looseness or corrosion can cause the car to die after it runs.
A good cleaning ( both the post and the INSIDE of the terminal are required) and tightening, which includes cleaning and oiling/greasing the screw.
2) Loose or slipping alternator belt. It can look fine, but can slip as you drive, causing the battery to go dead.
God bless your efforts.
Yes. A loose battery clamp or side screw will prevent your battery from charging, also will affect exterior lights, and possibly cause other issues. Your terminals should be clean and greased with dielectric grease your battery should be clamped or strapped down.
The clicking solenoid, and the failure of the starter drive to engage the ring gear leads me to suspect your battery needs to be charged, replaced, or you have high resistance at one of the connection points. If the battery is fully charged, I would clean the battery posts and terminals, the terminals that connect to the starter solenoid, the starter, and the ground terminal and the area where it seats on the block or where ever the manufacturer mounted it. When I say clean, I mean use a wire brush or some other means so that the surfaces are shiny. When you reconnect the cables to the battery be certain the clamps can't twist around on the battery post, if they do the clamps are not tight enough. If they won't tighten up you can get a lead cap at an auto parts store that will slip over the battery post. Loosen your battery clamp and spread it wide enough so it will slip over the cap and tighten the clamp. Also if the battery clamps are the repair type (they have two bolts and a metal plate holding the wire to the clamp), you should take it apart and clean all the surfaces and also the bare wire. Then take a pair of pliers with wide flat jaws and twists the strands together so they won't squeeze out when you tighten the 2 bolts on the clamp.
there are some grease fitting on the rear of the car and there may be some on the front tie rod ends also .so yes they do need lubrication . alot of cars now a days do not have grease fitting for there suspenson parts . but when you have your oil change and you see a charge for lubrication this just maybe the way that company charges for there labor service for changing your oil .
The following assumes you have a top-post battery rather than screw-in battery terminals on the side of the battery.
The battery may be new, but if excess side torque was applied to the battery post when the clamps were installed, the seal around the post may be cracked. Battery acid and fumes leaking through the crack (even if it is microscopic) cause corrosion between the post and connector. Try removing the battery cable clamps and cleaning them and the posts with a battery terminal cleaner brush. If you see corrosion (yellow or yellow-white crust) on the battery post, you have a cracked seal. Wipe everything around the post with a disposable rag, then coat the plastic around the post with petroleum jelly (but not the post. This will reduce the flow of corrosive chemicals onto the connection.
Another possibility is that the battery cable clamps were not thoroughly cleaned when the battery was replaced, and now the corrosion from the old battery is causing problems.
If you are removing or installing terminal clamps on a post-type battery, you must avoid putting a bending force on the post. That means when you turn the wrench or socket on the clamp bolt, you must hold the battery clamp with your free hand and use it to exert a force in the opposite direction from the wrench to keep the post from "bending." Failing to cancel the sideways torque on the post, as I mentioned above, will crack the seal around the post. Since I began observing this precaution, I have run batteries for a full lifetime without any terminal corrosion problems.
Remove all guards in the way, unbolt the baterry hold down clamp, remove,then unbolt each battery terminal. replace battery with a fully charged battery of the same type. Clean the terminals good before installing back on the battery. Use thw terminal washers, usually green and red in color, red for the positive post and so on. Rough the posts, smear some battery grease on each post install washers, then battery posts themselves. Tighten both posts just to the point that they will not turn, don't overtighten them they may break, then you'll need new post ends.
I would bet your guess is the correct one, cold weather is the killer of batteries,you need to chose one that has high cca's Cold Cranking Amps, the hight the number the longer it will turn your engine over in the cold before dying. the blue color around the battery post is corrosion,the best way to get rid of it is to pour hot water on it, "not pepsi" like some think because it will just return.
all batteries are clamped into place by one means or another.remove battery cables.remove plastic cover,if equipped.at bottom of battery,locate plastic clamp or 'wedge' with a single small bolt through the center,holding it to the bottom of the battery box.remove bolt & clamp.connect + cable first,then - when reinstalling.
I presume you mean the battery terminals. Remove negative terminal first by undoing the clamping nut then the positive and scrub the terminal and cable clamp with baking soda and water being careful not to get anything on your clothes or eyes. You could alternatively use a combination brush tool available from the auto parts store or a round file. Put the clamps back on and then coat them with vaseline or grease to slow down future corrosion. Be careful not to short the terminals with any tools while you are doing the work.