Cars & Vehicles
Antifreeze and Engine Coolant

When do you add coolant with the car started or not?

Top Answer
User Avatar
Wiki User
Answered 2007-01-10 20:03:51

You should add coolant with the engine off and cool, top off the radiator and fill the coolant reservoir to the cool or cold level. When the system is hot or running it will be pressurized and will be dangerous to open. You can however add coolant to the overflow reservoir at any time.

User Avatar

Your Answer

Still Have Questions?

Related Questions

Does car need to be running when putting in coolant?

yes, should never add coolant to cold engine

Why is my car overheating and get no heat inside the car?

You are probably low on coolant. You need coolant to heat the cabin and cool the engine. Add more coolant and take your vehicle to a shop to find/fix the leak.

Where do you add coolant in your mustang?

depending on what year the car is it will either be to the radiator or to the resivour

How do you add coolant to a Buick 1995 roadmaster?

Make sure the car engine is cooled off, preferably early in the day before the car has been started. The coolant tank is on the passenger side under the hood. Fill the tank to the line that says "" and you're done.

If the low coollant level light is on what is wrong?

you need to add coolant to the coolant resevoir. coolant is antifreeze. if you dont have enough in your car you can overheat and damage your engine.

Where do you put and fill water in BMW car engine?

At the radiator or overflow tank. Do not add water, add coolant.

Why do you keep on having to add engine coolant to a car?

Maintaining the fluids in the cars is important. A person has to keep replacing the coolant fluid because the car is using it or because there is a leak.

You were told by a mechanic to add coolant to your buick container if it needs it There is a cold line and a hot line on the container how high should you go?

After your car has completely warmed up the coolant level should be at the hot line. If it lower than that , wait until the car cools off and add coolant until it reaches the cold line. Never add the coolant directly to the radiator as you may over fill it.

Do you add engine coolant with car on or off?

Off and cooled down. Putting cold coolant into a hot block can crack it. And it can damage the radiator, as well as spitting the coolant back at you.

How to Add coolant to 1991 lumina?

how to add coolant to 1991 lumina?

How do you add coolant to a 2004 Chevy Malibu?

i have the same car. ya just go ahead and add it to your radiator while running

Does the car need to be running when adding antifreeze?

No , it's best to add coolant when the engine is cold

Coolant loss Any Expert advice?

Coolant loss out of what? Car, home air conditioner? Please add additional details in order to receive an answer.

Do you have to have your car running to add coolant?

No,you should never add coolant to a running car.Or even a hot one for that matter.They are a closed system,you risk being burned badly byv doing so.

Would a car lose antifreeze and over heat if the cap to the coolant was not put on tightly?

yes, because once the coolant started to steam it would seep out.

How do you add coolant to a car?

Coolant is added in the top of the radiator through the filler under the cap on some models. On the models without a radiator cap, the system is filled by adding coolant to the overflow bottle.

How do you add coolant to your 96 Buick Roadmaster engine?

The overflow resavour is where you add coolant

Where do you add the antifreeze Lincoln LS?

You can add it to the coolant reservoir. It's located in the top left corner of your engine. Make sure your car is cool before you add in the antifreeze.

Where do you add coolant to your c240?

You add coolant to a C240 at the radiator overflow tank. This allows the radiator to suck in coolant as needed when hot.

What does the code PO117 Engine coolant temperature circulating low input mean for a 2000 Chevy Astro Van?

Monitor your engine temperature and your coolant levels. Chances are you need to add more coolant to the car.

Your car starts slow white smoke started billowing out of hood now car does not start any ideas on what is going on?

White smoke is coolant burning off. You have a coolant leak or the engine is overheating. Have this looked at by a professional ASAP, and stop driving the car.

How much coolant do you need to put in your car?

The bigger your car, the more coolant you need to put in. The bigger your engine and car, the more coolant you need

Is car coolant different to truck coolant?


What does it mean when the low coolant light comes on in my 2002 Chevrolet Suburban?

I am not a car guy, but my low coolant light just came on in my Saturn Vue. I checked the owners manual and it said I should add anti-freeze/coolant. If you go to a car parts store (NAPA, Auto Zone, Pep Boys), they can tell you what type of coolant to add. If the problem repeats, you probabaly have a leak in your cooling system. Good Luck!

Can you add blue coolant to green coolant?

You should not mix colors or brands of coolant.

Still have questions?