Question about 2004 Toyota RAV4

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My wtaer reserve tank dries up easy

My water reserve tank dries up easy and i don't know why. Secondly where do you top up the radiator water. Is it through thr reserve tank or the radiator tank itself?

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Fill the rad cold and the reserve tank to the cold mark, i suspect the reserve tank is leaking

Posted on May 08, 2010

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Posted on Jan 02, 2017

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Thermostat mitsubishi


Did you refill the radiator and reserve tank after the work? If not, the radiator will suck water in from the reserve tank to top the radiator off.

Jun 21, 2014 | 2001 Mitsubishi Montero Sport 4WD

1 Answer

Refilling radiator


Before you add coolant always make sure that the engine is cool never add coolant to a hot engine.Next remove the radiator cap and fill it to the top with a 50/50 mixture of coolant and water.After you have filled the radiator with the coolant water mixture put the radiator cap back on and then fill the reserve tank to the cold level mark on the side of the bottle

Apr 27, 2014 | 2005 Chrysler Town & Country

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How do I put the water in the radiator?, where is the opening?


Should have a clear plastic tank on one side of the engine compartment with a cap. A hose runs from the top of the radiator to the tank.
The tank for the windshield washer has a snap on cap, the radiator reserve tank has a twist on cap.

Jan 31, 2013 | 1999 Chevrolet Cavalier

1 Answer

Water in reserve tank boiling from radiator


well the reserve thank usually holds excess water. basically when water gets hot it expands and increases in size, the expansion causes some of it to go into the reserve and it can be very hot even boiling..

did this happen before or is it strange ?
notice any other problems while driving around, noises, engine overheating ?
does the radiator fans turn on ??

Dec 30, 2012 | 1995 Toyota Corolla

1 Answer

My 1996 ford explorer was running fine today. I came home and parked and then returned to find a puddle of coolant. I filled the radiator with water and the reserve with water. I ran the engine for...


make sure the engine is fully warmed up (check the temp gauge and feel the top hose from the radiator to the engine) that hose should be HOT and it you should NOT be able to calopse it-it should feel hard. If you do not have a leak under these conditions, you probably just have an overfull surge tank and it 'puked' out some fluid. If you top radiator hose is NOT hard after the engine is fully warmed up, you have something wrong-it could be as simple as a radiator cap that is not sealing properly, or a leaky hose, an intake manifold leak, or an internal leak in the engine (don't rule out a leaking radiator, it has end tanks that can and do leak).

Sep 05, 2011 | 1996 Ford Explorer

1 Answer

Overheating and trying to locate the radiator and the reserve coolant tank. Don't know which is which?


The radiator is usually the black tank in front of the fan. It has a silver cap (DO NOT REMOVE WHEN HOT!!!) that you can take off when the car is cold to check if there's fluid in it. The reserve coolant tank is usually a white plastic and has a hose in to that connects to the radiator. It is used to catch the extra fluid that comes out of the radiator when it warms up becasue coolant expands when it's heated. The reservior should have two marks on the side of it. One for "max fill" and one for "add". Add coolant to it if it is below the "add" line. If it's extreamly low, you'll have to add coolant a coulpe times to level it off once air gets out of the system. Your best bet is to remove the radiator cap, top it off with the right antifreeze (you can get this pre mixed) and replace the cap. Then fill the reservoir with the right antifreeze to the max fill line and drive the car until it gets warm. About 10 minutes. Then top off as necessary. I do NOT recommend using plain water to do this. If you use water it can freeze and do extensive damage to your engine. Go to your local auto parts store and ask them for the correct antifreeze. Ask them how to mix it or purchase the pre mixed kind.

Dec 08, 2010 | Lincoln Continental Cars & Trucks

1 Answer

Why is all the fluid staying in reserve tank-none


The line to the reserve tank to the radiator could be plugged up or you have a loose radiator cap or a bad seal causing the tank to hold whats in it. The coolant system is a pressurized system and if a seal is bad or a line is plugged you will experience this problem for the pressure is not there to take whats needed from the tank to deploy in the coolant system

Jan 26, 2010 | 1999 Oldsmobile Silhouette

1 Answer

I have a 2001 chevy Malibu. Have problems with


Due to the complexity of the newer cars on the raod today!! what you are experiencing is Normal!!! since the coolant systems on the newer cars run at such a higher pressure and a high Rpm the reserve tank which has it's on drain hose for excessive overflow from the radiator allows the extra high pressure release from the radiator to back flow to the reserve tank and then out the reserve tank overflow hose on to the raod

Jan 17, 2010 | 2000 Chevrolet Malibu

1 Answer

Replaced water pump, alternator, radiator, crank sensor and no coolant leaks and car has antifreeze, but why is low coolant dashboard indicator light keep flashing on 97 saturn sl2


Inside the coolant reserve tank there is a sensor for coolant level.


Over time,this sensor can get stick.


Inspect the coolant reserve tank for crack or leak.

Locate the coolant level switch/sensor and soak it in clean warm water.

Make sure it's free to move up and down the float path.

Top off the coolant tank with coolant only.



Dec 02, 2009 | 1997 Saturn SL

1 Answer

Radiator pressure cap on 2001 Grand Am GT


If it is on the reserve tank not the radiator. then there should be a air vent on it somewhere. it might even be a hose coming from the top of the tank. Make sure that it is not plugged. When your car gets hot it overflows the water in the radiator in to the reserve tank, as it cools it sucks it back. if you don't have a vent opening then it is like taking air out of a milk carton with the lid on. If it is the cap on the radiator then you might have air in the hose or engine.

Jan 31, 2009 | 2001 Pontiac Grand Am SE

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