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Radiator cap won't come off

Resevoir cap won't come off to add water

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Just had a go-round with same problem in an 87 Cavalier. Had to take off radiator cap, add coolant, squeeze bottom radiator hose. After no more bubbles, add coolant, squeeze top radiator hose. Squeeze bottom again. Add coolant as needed. The air was because it was run low when the radiator cap gasket failed and coolant boiled out. Never got the overheat notice on digital dash or idiot light. Make sure you have a new radiator cap.

Jun 24, 2014 | 2000 Chevrolet Impala

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Do you put water in the radiator

Yes, you can put it directly in the radiator. You may have a resevoir you can add more coolant in, also. Either one is okay. I much more prefer to add it directly to the radiator. Just please make sure it is completely COOL before you open it. If not, then open it very slowy. When you take the pressure off of it, the water/coolant will instantly boil and explode. I still have the scars of removing a cap that I thought was cool enough.

Aug 02, 2013 | 1999 Buick Park Avenue

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How to fix a vapor lock in the radiator on 99 mercury couger

Run the motor until it's a little bit warmed up. Put a big rag around your hand and remove the radiator cap while the engine in idling. Don't take the cap off completely all at once. Just loosen it first. After the steam and a small amount of coolant escape,

remove the cap completely and slowly pour water into the radiator and let the vapor circulate out. Don't get burnt. The rag around the hand is of utmost importance to avoid steam burns.

If the radiator won't take more water, there's a drain **** on the bottom of the radiator. Open it with a pliers if need be. They're usually too tight for just finger strength.

Let about 1/2 liter of coolant drain out onto the pavement. Close the drain **** snugly, but be reasonable.

The vehicle is idling all this time. Now, remove the radiator cap as described above, slowly add water (about one liter per three minutes, so you don't crack the engine block) and let the gas circulate out.

Jul 27, 2012 | Mercury Cougar Cars & Trucks

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I have a 2003 Ford taurus. I keep on losing a lot of the coolant out of the resevoir cap. It percolates, then I lose it. I've replaced the cap twice. The first time it looked like the cap was...

When it is percolating, can you feel if the bottom radiator hose is hot and the top one cool? If so your thermostat could be bad. Are your cooling fans coming on at the right times and last but not least, do you have any water in your oil? That could be a bad head gasket and the percolating would be the exhaust gases bubbling back through the radiator.

Jul 13, 2017 | 2000 Ford Taurus

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How to know when there is enough antifreeze in radiator

Hello there and welcome to fixya
Checking your radiator fluid:
antifreeze2.pngEvery modern vehicle has a Radiator fluid overflow compartment that is translucent so you can see where the coolant level is without removing the cap. On the side of the compartment there is a full line and an add line. the coolant should be between the two lines. If it's below the add level add 50% water/coolant to the full level.
The green line is the full line, the red line is the add line in the picture.
If you don't have antifreeze but you need fluid, add distilled water,not ordinary tap water, so mineral deposits won't build in the radiator and cause corrosion or blockage. However, you should keep the correct ratio of water and coolant to prevent corrosion and for the highest level of overheat or freeze protection.
To check the fluid IN your radiator
radcap.png you will need to remove the radiator cap. DO NOT remove the radiator cap while the engine is hot. The contents are under pressure and many people have gotten severe burns by removing the radiator cap when it is too hot.
Notice the word "caution" on the cap in the picture.
It goes on to say the contents are under pressure.
IF you have no choice, but to remove the cap when hot, use a towel and remove it slowly to release pressure before you get the cap off.
The fluid in the radiator should be at the top of the radiator.

Make sure you keep 50% water/coolant mixture in the radiator. Some people put more antifreeze in during the winter, but never put more than 70% coolant. It will reduce it's ability to carry heat away from the engine and prevent corrosion.


Dec 23, 2011 | Oldsmobile Cars & Trucks

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Where is the radiator cap to add stop leak

Lift the hood. In the upper right hand corner is the overflow fill tank. If you want to put it in fast reach down the right side of the radiator(when it's cool) unscrew the small plastic petcock and drain a gallon or two of antifreeze into clean pan. Replace petcock. Open the cap on tank and add stop leak. Fill back up with antifreeze. Now would be a good time to change it. Go to Napa and buy the original antifreeze the car came with Zerex G5. Mix 50/50 with distilled water.Fill to just above cold line and start engine keep adding mixture till it won't go down any more. Replace cap and watch level for two or three days of driving add mixture after engine is cold12_2_2011_3_42_50_pm.gif

Dec 02, 2011 | 2005 Chrysler Pacifica

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Why is it that the radiator fan wont run?and sometimes when water came out at the coolant cup during traffic situation.

Thanks for choosing FixYa Jamie and welcome. If your cap is leaking, you need a new cap. It shouldn' come out the cap. There should be a drain hose under your resevoir. You need to check your radiator fuse in the fuse box to see if it has blew. If it hasn't, you need to check the wires to the radiator. If they are not bad, you need a new fan. It usually comes out when there is to much fluid in the coolant system.

Aug 27, 2011 | 2003 Honda Civic

1 Answer

1997 volk jetta where do i add water

To add Antifreeze into the coolant system, you add the fluid into the overflow resevoir. The radiator on VW's does not have a rad cap and they use the overflow. Hope this helps.

Apr 01, 2011 | 1997 Volkswagen Jetta

1 Answer

Loosing antifreeze

air in your hoses from the flush.

To Fix:
(you'll need more anitfreeze)
turn on engine, open radiator cap.
squeeze hoses, bottom one first, to releive pressure/air in your hoses.
Notice the level dropping in the radiator cap hole.
Once you seen the fluid level drop, add more anitfeeze, directly to the hole.
Once hole is filled to the top, replace radiator cap, and drive.

Jan 11, 2009 | 2004 Kia Rio

1 Answer

Where is 2003 Ford Focus ZTW radiator cap?

If your resevoir cap is a screw on cap it is probably the only cap you have most cars nowadays pressurize the resevoir and this is where you add coolant and dont have a rad cap

Dec 31, 2008 | 2003 Ford Focus

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