Common questions

What do you need to know about radiator fluid?

What do you need to know about radiator fluid?

Radiator Fluid: What to Use & What to Avoid. Radiator fluid is the antifreeze coolant that is used in your radiator to help cool your car engine. Always making sure that your vehicle has adequate amounts of the correct type of radiator fluid will help keep your car engine cooler and allow your car engine to last longer.

What causes a leak in the radiator fluid?

Reasons for loss of radiator fluid. The plastic container that you top off has a leak. (Check underneath it for puddles, also make sure the hose between it and the radiator is not leaking). Radiator (Look on the bottom for drips, it is typically behind the grill in front of the engine) Water Pump (This one can be harder to spot leaks with,…

Why is coolant coming out the top of my radiator?

Various possibilities come to mind based on issues I’ve had with my cars over the years: I had a head gasket leak from the cylinder into the coolant that was pushing coolant out the top of the overflow tank. Wash off the overflow tank after filling it, so it’s easy to see if it’s coming out the top or from somewhere else. Highly active question.

How can I tell if my Honda Civic has a coolant loss?

When I have a small coolant leak or coolant loss on a car like this Honda Civic, the first things I always check is.. look for obvious leaks on hoses and the radiator tanks, then I inspect the radiator cap. I am looking for rotted, cracked, dry seals or a weak spring on the radiator cap.

What should I do if my radiator fluid has run out?

When it was last flushed and filled, what was it filled with? (same choices as above) You can purchase a coolant freezing/boiling point tester from most auto parts stores and even in the auto department of places such as WalMart for a few dollars. You suck up some of the coolant into the tester and it tells you what temperatures it can handle.

How can I tell if my radiator fluid is leaking?

I doubt the fluid is overflowing. You most likely have a leak somewhere. The plastic container that you top off has a leak. (Check underneath it for puddles, also make sure the hose between it and the radiator is not leaking).

How does coolant drain out of a radiator?

Not a drop had drained back in. There are two hoses on the reservoir; a hose from the radiator neck to the bottom of the reservoir, and a hose from the top/side of the reservoir that drains out underneath the truck.

Why is the bottom of the radiator warmer than the top?

The bottom radiator hose is a lot warmer now (which indicates the radiator is not plugged and the pump is circulating coolant), but engine temp is even colder than before. I can also now see the coolant churning up in the top of the radiator, with the cap off. When I turn the heater on, the engine temp will drop a little bit too.

Why does my car get too hot when I idle?

As Tester said, it sounds like the radiator fans are not working. This is allowing the coolant to get too hot when the car is stationary. When you start driving air is flowing through the radiator and cooling the engine. The fans should be doing that when the car is not moving, but for some reason they’re not. Check the fuses for the fans first.

Is it safe to use transmission fluid in radiator?

Automatic transmission fluid is not designed to withstand the high temperatures that are created in your car engine and offers little or no protection at all from overheating. In addition, using automatic transmission fluid in your car radiator may result in damage to the engine block of your vehicle.

How can I tell if I need to add coolant to my radiator?

Check the freezing and boiling point of your coolant. Over time, the ability of your radiator fluid to absorb and dissipate heat declines. You test the freezing and boiling points with an antifreeze hydrometer. See the directions under “Checking the Coolant Protection Level.” Add coolant as needed.

As Tester said, it sounds like the radiator fans are not working. This is allowing the coolant to get too hot when the car is stationary. When you start driving air is flowing through the radiator and cooling the engine. The fans should be doing that when the car is not moving, but for some reason they’re not. Check the fuses for the fans first.

What does it mean when your car Idles smooth?

Smooth idling indicates that your engine’s fuel and air are mixing just right. What is rough idling? If your vehicle’s idle is rough, possibly rising and falling, or having difficulty maintaining a steady rate of rotation, you may have a problem that needs fixing.

What does it mean when your car engine is idling?

Intake leak When you start the engine and let it run without pressing the pedal, it is called idling. When the engine is left in idling position, it maintains a steady but low rate of revolution approximately 1,000 RPM. The RPM needle stays constant, and this indicates that the vehicle’s engine is receiving the correct amount of air and fuel.

Do you remove the radiator cap when the engine is hot?

FYI you should NEVER remove the radiator cap when the engine is hot. You could get seriously burned. Wait until the engine and radiator have cooled before you remove the cap. Thanks so much for the replies, I really appreciate it. I will check the fans as you guys suggested, but I can tell you that a fan does come on for sure after the car is off.

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Ruth Doyle