Battery terminals getting carotid

Asked by Oct 31, 2016 at 10:46 PM about the 2004 Cadillac CTS RWD

Question type: Maintenance & Repair

Every few weeks my terminals get carotid and
when i go to start the car it keeps rolling over, I
have to disconnect the negative post from the
battery let it sit for a few mins then put it back on
and it will start. Has anyone had this problem or
know what it could be?

4 Answers

28,935

Carotid? Like the arteries to your heart?

Sorry that was my stupid auto correct I didn't even notice

I've been trying to find an answer everytime I look it up it I just find people saying to clean the terminals and your good to go, but I want to know if something is causing the issue. Both terminals are getting carodid.

28,935

There are a couple things that can cause battery terminal corrosion, one is the hydrogen gas released by the battery, some batteries have vent holes (in cases where the battery is mounted in a trunk) others just vent to the atmosphere. This shouldn't be a problem with modern batteries. The other thing is the lead sulfate and copper, which makes up a bimetal contact between posts and terminals. The corrosion usually accumulates on the negative post due to the charging system undercharging (less common is accumulating on the positive post if the system is overcharging.) After you clean the posts and terminals, try coating them with dielectric grease.

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